17-Nov-18 07:24 PM Find a resource that you think the community will find useful? Post it here! In order to keep the signal to noise ratio high, discussions about resources posted here should happen in another channel. This will be enforced by Admins. 17-Nov-18 07:24 PM Pinned a message. 18-Nov-18 05:09 PM Pfeiffer Vacuum has a great vacuum hand book that covers everything from the fundamental formulas to practical tips on leak hunting. It does of course focus pretty heavily on their own products, but there is still a lot you can learn from them. https://www.pfeiffer-vacuum.com/filepool/File/Vacuum-Technology-Book/Vacuum-Technology-Book-II-Part-2.pdf?referer=1456&request_locale=en_US 18-Nov-18 09:03 PM A weird french PDF book about vacuum, vacuum valves and DiY tools. Sort of explains how to make mostly everything, including a turbopump. It is in french, but should be translate-able. 18-Nov-18 09:03 PM https://drive.google.com/file/d/1WZGzSdgISH3_2-cvSi6ScUxg_2nvoV-t/view?usp=sharing 19-Nov-18 05:44 AM Great paper with explanations about pretty much every type of cryocooler: https://core.ac.uk/download/pdf/81824226.pdf 19-Nov-18 06:46 PM @Applied_Ion was kind enough to share a lot of their research on different vacuum technologies and methods. You can find things in here like different data sheets to a lot of stuff on how to clean a vacuum system. https://drive.google.com/open?id=1ZUwWC_xLnc24KPE1lzBMgEKCOU5bj_NT 19-Nov-18 07:28 PM Two books on partical accelerator physics and design. https://www.dropbox.com/s/d23iq7alg3cnb1u/cpa_humphries.pdf?dl=0 https://www.dropbox.com/s/2bzkebqqxthf8zj/cpb_humphries.pdf?dl=0 19-Nov-18 08:17 PM Another old article about amature accelerators I had kicking around. Please account for 850% inflation in their cost estimates https://blog.goopypanther.org/ramble/2018/11/19/The_Amature_Scientist_Accelerator/ 19-Nov-18 08:46 PM https://dcc.ligo.org/cgi-bin/DocDB/ListTopics - paper server for the LIGO detector. Tons of papers of prep for UHV, outgassing info, machining for UHV, as well as details on the detector itself. 19-Nov-18 11:19 PM DiY Semiconductor tooling and process manuals (hey, they are, don't judge me, XD) https://hackaday.io/project/107598/files -> Compendium! ----- Pdf about Tooling -> Cookbook! ---------Pdf about processes with said tooling. 20-Nov-18 04:38 AM A very cool collection of articles with emphasis on industrial vacuum practice. The Pfeiffer manual is good as far as it goes, but has an emphasis on hardware components (which they sell) over system-level issues. By Phil Danielson http://www.normandale.edu/departments/stem-and-education/vacuum-and-thin-film-technology/vacuum-lab/articles 20-Nov-18 07:06 AM http://www.belljar.net/ 20-Nov-18 07:06 AM Collection of articles available for free and many more very useful, practical items available in pdf for $40 22-Nov-18 04:52 AM so for anyone doing anything with (especially concentrated) HF, among other things, have printed out copies of this sitting around and make sure a copy gets brought with you when you end up in the hospital https://www.honeywell-hfacid.com/wp-content/uploads/2014/06/2734-Medical-Treatment-for-HF-Acid-Exposure_v7-WEB.pdf 02-Dec-18 09:56 AM Aye, aye Cp'n! 02-Dec-18 09:56 AM Btw, I will be making the CNC to analog boards soon. PCB's by themselves are quite cheap, so of anyone wants one or two (X-Y) let me know. 02-Dec-18 09:56 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/PCB1-AD512.jpg 02-Dec-18 09:56 AM I'll be assembling some, but dunno about price for that. 02-Dec-18 09:56 AM (PCB image is not the final-final version, just in case you find weird design things like the grating ground plane) 02-Dec-18 01:25 PM http://www.tubecrafter.com/tubecrafter_020.htm Tungsten wire through glass, vacuum-tight ^ 02-Dec-18 04:20 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Atlas_of_Neutron_Capture_cross_sections-E8C2E.pdf 02-Dec-18 04:20 PM Beware this is only for n,γ reactions, not any other type of neutron capture like neutron induced fussion etc 03-Dec-18 08:53 PM PCB motor actuators are for sale now (from the PCB motor guy) https://www.tindie.com/products/Microbots/flexible-pcb-actuator/?utm_source=twitter.com&utm_medium=referral&utm_content=tweet&utm_campaign=new_product_tweets 05-Dec-18 09:55 AM Scotch brite polishing pads (velcro, 125mm) for people that can't find them in their country (like me) https://es.aliexpress.com/item/DHT-y-tis-30-unidades-5-hook-loop-abrasivo-no-tejido-Discos-de-lijado-grueso-a/32851518850.html?spm=a2g0s.9042311.0.0.77dd63c0lzirAR 06-Dec-18 12:44 PM Excellent PDF from CERN on all of the major types of accelerator structures and details about them: 06-Dec-18 12:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Linear_Accelerators-44D42.pdf 07-Dec-18 05:17 AM This is what I read in prep for my work at CERN: 07-Dec-18 05:17 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/accelerator_physics-92468.pdf 07-Dec-18 05:17 AM it's the 1st Edition not the 3rd but practically the same 07-Dec-18 05:17 AM also these: https://www.dropbox.com/sh/3cvti8o3zmi3nt0/AAByGLZU536F8dxYVGR4BKL5a?dl=0 Please don't spread them around :p 07-Dec-18 05:17 AM not accellerator related but still 08-Dec-18 12:20 PM https://www.ebay.com/itm/twinbird-free-piston-cryogenic-cooler-with-single-Phase-VFD-controller-and-stand/401644839300?hash=item5d83e5e184:g:WUQAAOSwgVJb-03P:rk:25:pf:0 09-Dec-18 12:56 PM https://www.ibiblio.org/kuphaldt/socratic/sinst/doc/fail.html 09-Dec-18 01:00 PM http://zeva.com.au/Projects/SpotWelderV2/ 09-Dec-18 01:00 PM http://frikkieg.blogspot.com/2010/ there is also this thing 09-Dec-18 03:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/reuter_stokes_helium-3_filled_position_sen-7FBA5.pdf 09-Dec-18 04:09 PM https://www.researchgate.net/publication/265176717_Invited_Review_Article_Development_of_crystal_lenses_for_energetic_photons 11-Dec-18 10:22 AM Here are a list of vacuum engineering books with brief description I have collected and purchased online very cheap which have been invaluable to my own efforts: 11-Dec-18 10:22 AM 1.) Fundamentals of Vacuum Science and Technology - Gerhard Lewin, 1965 An exceptional book that covers a wide range of topics, including basic gas theory, conductance, surface effects, pumping processes, vacuum gauges and measurements, pumps, high vacuum components, materials, and high vacuum joints. The key strengths of this book are the chapters looking at conductance calculations and surface effects. The chapter on surface effects is lengthy and very detailed, and includes a large amount of in depth reference material on the mechanisms of sorbtion and desorption, looking at the derivations and mechanisms of these processes in detail, with a large amount of reference charts, data, and equations. 11-Dec-18 10:22 AM 2.) Introduction to the Theory & Practice of High Vacuum Technology - L. Ward, J.P. Bunn, 1967 Another exceptionally detailed and rigorous book on the foundations and principles of high vacuum engineering. This book covers a wide range of topics including gas theory, conductance and flow, vacuum pumps, vacuum gauges and measurements, vacuum construction and sealing techniques, numerical design of high vacuum systems, leak detection, and practical applications of high vacuum technology. The key strength of this book lies in the chapters dealing with calculations for gas flows in vacuum, as well as numerical design of high vacuum systems. These chapters go into greater depth of the mathematics and derivations behind vacuum system design, providing excellent and in-depth examples for calculating various parameters in high vacuum system design. 11-Dec-18 10:22 AM 3.) Handbook of High Vacuum Engineering - H. A. Steinherz, 1963 This text provides an excellent practical reference for high vacuum engineering. While there are some derivations and mathematics on high vacuum engineering design, the key focus and strength of this book is the in-depth detail on the various high vacuum technologies. 11-Dec-18 10:22 AM 4.) Practical Vacuum Systems - Rolland Rutledge LaPelle, 1972 This text focuses primarily on practical systems using high vacuum. The book offers a very good basic and introductory read to high vacuum systems, going over topics such as basic pumping fundamentals, materials of construction, vacuum pumps, troubleshooting/cleaning/repair of high vacuum systems, gauges/analyzers/calibration, vacuum vessels, etc. 16-Dec-18 02:40 PM Originally the server was going to be called the Dead Gauge Society, after a particularly funny inside joke on twitter. @qualia wrote this as the original channel introduction before we switched the name to Vacuum Hackers. Why the name? One fateful evening in October of 2018, on Twitter, Qualia (@profanegeometry) eavesdropped on a conversation between @GigaSquirrel and Tom McCarthy (@FusorFusion) that would change the course of history forever. Tom was looking for a high vacuum gauge for <10^-3 mbar measurements, to which GigaBecquerel provided a link to the notorious Fusor Forums documenting the repair and reverse-engineering of a low-cost analog-readout ion gauge available en masse on eBay (namely, the Instrutech IGM-400). Days later, Qualia received their very own gauge in the mail and posted a picture of it, to which a deluge of like-minded vacuum folx summarily took notice and bought their own. Dave A (@dave_32768) proposed starting a club; @Nixie_guy suggested the name "Dead Gauges Society" (à la 'Dead Poets Society'), and the rest... is history. ✨ 17-Dec-18 10:30 AM For those of you here interested in SEM stuff, there is a free monte carlo simulation software called CASINO. This allows you to simulate beams and target interactions. 2 versions of this: 2.51, and 3.3. The latter is more involved, but allows you to simulate and predict SEM images and signals based on beam and target parameters. It also has the ability to simulate signals from x rays and back scattered electrons. Beam energies from 0.1 to 30keV are supported: http://www.gel.usherbrooke.ca/casino/index.html 18-Dec-18 12:06 PM https://gigabecquerel.wordpress.com/2019/05/22/reverse-engineering-the-instrutech-igm-400-hornet-gauge/ Writeup in the Hornet gauges 18-Dec-18 02:10 PM don't know if it was here already, but since my paper copy of it arrived this week: Pfeiffer's complete Know-How database https://www.pfeiffer-vacuum.com/en/know-how/ 18-Dec-18 02:10 PM and the possibility to order your own copy pressed on dead tree carcasses: https://www.pfeiffer-vacuum.com/en/contact/literature-ordering/ 29-Dec-18 01:57 PM Has anyone the Pfeiffer TCP200 manual? 01-Jan-19 08:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Evidence_of_nuclear_fusion_neutrons_in_an_-16674.pdf 01-Jan-19 08:32 AM @qualia this might be of interest to you, regarding your last twitter post 01-Jan-19 11:50 AM If anyone needs info on the DPF, I got 239 papers on them. Beauty of DPFs, like seen in the nanofocus paper, is that it is a very readily scalable device. 08-Jan-19 11:37 AM http://www.npl.co.uk/upload/pdf/20081014_nuc_thomas2_1.pdf 11-Jan-19 02:19 PM https://inis.iaea.org/collection/NCLCollectionStore/_Public/16/031/16031513.pdf Let's use some kg of highly enriched uranium as a neutron multiplicator for higher detection efficiency! 15-Jan-19 04:25 AM https://pdfs.semanticscholar.org/a557/ae0d1a510e8b125e6b023b07a76300e6afba.pdf 15-Jan-19 04:25 AM this is super interesting 15-Jan-19 04:25 AM I wonder if CNT filaments would work for SEMs 15-Jan-19 04:25 AM http://sci-hub.tw/https://ieeexplore.ieee.org/document/8481707 15-Jan-19 09:44 AM https://ac.els-cdn.com/S0925963504003929/1-s2.0-S0925963504003929-main.pdf?_tid=7c9d1e4b-37c9-4d1f-8b53-685759473eb0&acdnat=1547574130_eb2a0f49789e9df6d74014c31bc731c4 15-Jan-19 09:44 AM "The optimal parameters set was the following: 30 min of growth time, 600°C of temperature, 100 mbar of pressure and 10/70 ratio between H2 and CH4 in the precursors mixture." 15-Jan-19 11:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Fabrication_of_Carbon_Nanotubes_on_Tungste-5A01F.pdf 15-Jan-19 11:09 AM this setup also looks pretty nice and easy to build 16-Jan-19 10:56 AM basic overview of common electron sources: 16-Jan-19 10:56 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Electron_Sources-255FF.pdf 29-Jan-19 12:58 AM LIGO vacuum compatible materials list https://dcc.ligo.org/LIGO-E960050/public 29-Jan-19 03:32 PM SRIM, or Stopping and Range of Ions in Matter, is an incredibly powerful free simulation code for looking at sputtering, target damage, implantation, etc. For use with semiconductor manufacturing and general ion interactions with matter. Very well established code cited regularly in papers and text books. SRIM 2013 is the most updated version: http://www.srim.org 29-Jan-19 03:32 PM Download page for SRIM 2013: http://www.srim.org/SRIM/SRIMLEGL.htm 29-Jan-19 03:32 PM In addition, I have written up a detailed overview looking at using the software for more advanced simulation using a custom input file. This one specifically looks at more accurate simulation of ion bombardment from a DC glow discharge plasma (as opposed to a default monoenergetic beam at direct incidence) using the Davis and Vanderslice ion energy distribution function. Full code, instructions, and detailed walk through is provided along with linked reference papers: http://appliedionsystems.com/portfolio/trim-simulation-of-sputtering-and-implantation-from-dc-glow-discharge-plasma-in-stainless-steel/ 03-Feb-19 01:44 PM Got a few inquires on Twitter for resources for fast Rogowski coils for pulsed power measurements. Here are several papers on the subject - 7 total, broken down into 2 ZIP folders. In particular, the paper titled "Design and Use of Small Rogowski Coils for Use With Large, Fast Current Pulses" from Cornell is the design I will probably be employing for EXEDA: 03-Feb-19 01:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Rogowski_Coils_for_Pulsed_Power_-_1-BF1B5.zip 03-Feb-19 01:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Rogowski_Coils_for_Pulsed_Power_-_2-0E604.zip 14-Feb-19 07:27 PM randomly bumbled into a book published by LANL in 1994 called 'High-Power Microwave-Tube Transmitters' pertinent to radar & accelerators specifically; seems to have a bunch of high voltage & pulsed power info sprinkled throughout. https://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-12687-MS 27-Feb-19 03:45 AM https://gigabecquerel.wordpress.com/2019/05/22/collection-of-information-about-russian-snm-tubes/ Wrote some stuff about those russian corona neutron detectors, might be interesting to some here 04-Mar-19 02:57 AM Okay, so the NFC tags I bought where MIFARE classic tags, wich are only compatible with certain devices (that have NXP hardware). 04-Mar-19 02:57 AM and I can't use them in my phone. 04-Mar-19 02:57 AM Can anyone use them? 22-Mar-19 05:20 AM @Conmega @niklas A source of silicon doped wafers and sections at a reasonable price! (P doped (boron) Orientation 1-0-0 https://www.amazon.co.uk/s?k=alpha+nanotech+inc.&ajr=0&ref=nb_sb_noss 22-Mar-19 05:57 AM Oh nice find @Nixie that isn't bad pricing and its nice you can get onsie twosies to test before getting multiples of 10 like most other places require. I think you can get cheaper from other companies, but maybe not as easily as amazon ordering :) Also its nice they have down to like 2" wafers still! 26-Mar-19 01:58 PM https://www.crystals.saint-gobain.com/sites/imdf.crystals.com/files/documents/efficient_positioning_of_sipms_on_large_scintillation_crystals.pdf Got too many SiPMs lying around? Want to glue them to scintillators? Do it the right way! 27-Mar-19 05:31 AM If anybody really needs wafer Si and can’t get it I could post you some - especially if you don’t accurately care what the dopant concentration or Miller index is 30-Mar-19 12:12 PM https://scintillators.ru/index_en_booc.htm Lots of books about radiation detection and detector readout 30-Mar-19 04:00 PM http://www.quartz1.com/price/techdata/Priemniki_i_detektory_izluchenij_2012.pdf Data on pretty much every single russian radiatio detector 01-Apr-19 01:17 AM @AdamMcCombs https://www.aliexpress.com/item/Outdoor-Fishing-Vest-For-Men-Jacket-Summer-Sport-Clothing-Camping-Multi-Pocket-Director-Vests-Safety-Waistcoat/32888457869.html?spm=a219c.10010108.1000001.12.59713db0DXAMl6 01-Apr-19 03:09 PM LIGO technical note on clean soldering process for UHV https://dcc.ligo.org/public/0099/T1300040/001/CleanSoldering-v1.pdf 02-Apr-19 12:51 PM Probably common knowledge to most this page exists, but is nicely written up and provided me some useful information on producing deuterium gas from heavy water: http://www.fusor.eu/deuterium.html 02-Apr-19 01:06 PM I got a textbook on electrical contacts, corrosion chemistry, arcing, plating properies https://www.dropbox.com/s/9y8a7i1sbqh2qfc/Electrical%20Contacts%20Principles%20and%20Applications%202ed%20%5B2013%5D.pdf?dl=0 02-Apr-19 10:19 PM @goopypanther presumably you could have simply linked to libgen.io 02-Apr-19 10:19 PM but thanks! 02-Apr-19 10:19 PM I grabbed this recently, haven't started digging in yet http://libgen.io/search.php?req=Electrochemical+Methods%3A+Fundamentals+and+Applications+bard+faulkner&lg_topic=libgen&open=0&view=simple&res=25&phrase=1&column=def 04-Apr-19 06:16 PM Good doc on dry etching processes!: https://www.tf.uni-kiel.de/matwis/afm-download/mst_ws2018/dry_etching_2018.pdf 06-Apr-19 03:24 PM Good doc on wet etching reagents for a whole range of materials : https://engineering.dartmouth.edu/microeng/processing/etching/Miscellaneous%20Etchants.pdf 15-Apr-19 04:01 PM If you are looking for ceramics, fused quartz, etc., in the US, check out https://www.advaluetech.com/ I found them on eBay, but maybe they have a bigger line thru their site. Good prices and happy to sell one or two. 19-Apr-19 11:24 PM If you’re looking for alumina or zirconia (etc) parts and materials (and anyone else here happens to be in Australia) : http://www.cof.com.au/ 23-Apr-19 03:45 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/PMT_handbook_v3aE_complete-073DF.pdf 23-Apr-19 05:51 AM Open source Monte Carlo - kinda like the OpenOffice answer to MCNP 23-Apr-19 05:51 AM https://github.com/openmc-dev/openmc 03-May-19 04:17 AM @qualia cool review article here on diamond reactors http://cyber.sci-hub.tw/MTAuMTAxNi9qLmRpYW1vbmQuMjAxMS4wOC4wMDU=/schwander2011.pdf 05-May-19 12:35 PM Does anybody have a data sheet on the blue Leybold sensors? I have two with red bands and am not sure if they are thermocouple or some other style. They have a NSN number but the other numbers do not correspond to any sensor from them I can find. They have some kind of field coil inside which makes me thing along the lines of a cold ion gauge or alphatron or something like that. 05-May-19 12:37 PM This would be a question for #general or #off-topic-thats-sometimes-on-topic 07-May-19 10:08 AM Here is one. Can’t find any info on them. 07-May-19 10:08 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image0-7D66B.jpg 07-May-19 10:39 AM @Charles please read the pinned post here, this channel is for recources that might be interesting for others here 10-Jun-19 08:05 PM Found what seems to be a fairly interesting surplus tool shop. Haven't ordered from them personally, but the selection looks quite interesting: https://www.harryepstein.com/index.php/ 12-Jun-19 04:13 PM PDF Swagelok reference manual for Swagelok parts - a great handy reference for looking up what their parts are called and their part numbers. https://www.swagelok.com/downloads/webcatalogs/EN/MS-13-151.PDF 12-Jun-19 04:13 PM Just the common tube fittings not the fancy ones like VCR etc. 19-Jun-19 10:35 PM <__ice9#6039> Note for anyone not yet aware (as I was not until a couple months ago and just used it again today): almost any metal can be soldered with the right flux and a silver-bearing solder. I often use Superior No.71. It will do brass, copper, bronze, Monel cupronickel, steel, stainless steel, Inconel, Hastelloy, pure nickel, and loads of other things. Except aluminum which needs a zinc-bearing solder. Incidentally aluminum can also be electroplated with almost anything if you first etch it with nitric acid, apply a zincate coating, etch it off with more nitric acid, apply it again, and then plate with something like nickel as a barrier layer. 19-Jun-19 10:35 PM <__ice9#6039> Not sure if this belongs here. Just happened to use it again recently and it was new to me as of a few months ago. 21-Jun-19 06:42 AM Tungsten solders well (I use jewellery Ag/Zn silver solder as the diameter is very fine) and bifluoride flux. But tantalum can’t be soldered 23-Jun-19 09:34 PM Yeah tantalum can’t be soldered and the usual trick of hydrogen brazing can’t be done cause tantalum reacts with hydrogen at temperature. For fusing tungsten we would hydrogen bell jar radiant arc weld with nickel or hasteloy as the filler. The arc generator was a high current transformer tickled with a neon sign transformer to strike the arc and the arc was not to the work but was between two electrodes near the work and the radiant energy from the plasma would heat the weld area. Kinda a bit dangerous cause if there was a big air disturbance the hydrogen in the jar could pop, but it was just the noise that was a bit scary. The bel jar never actually would blow up. 24-Jun-19 04:45 AM http://www.tuks.nl/pdf/Reference_Material/Thyratrons_Preamble.pdf This is a really good paper, that seems to explain most of the practical elements of using thyratrons 07-Jul-19 12:18 PM https://www-pub.iaea.org/MTCD/publications/PDF/Pub1263_web.pdf Energy database for PGAA, the nuclear version of XRF! 11-Jul-19 01:13 AM http://www-physics.lbl.gov/~spieler/TSI-2007/PDF/Why_Things_don't_Work.pdf This is a very helpful presentation about common mistakes with amplifiers, groundung and whatnot. Also I'm pretty sure it's written by someone who has to fix those mistakes on a daily basis and has become a bit salty by now 11-Jul-19 01:21 AM Hah so it seems and the first real page describes real problems I have seen in real life. 12-Jul-19 02:02 AM Paper on the neutristor from conversations in the Radiation chat: 12-Jul-19 02:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Novel_Surface-Mounted_Neutron_Generator-C528B.pdf 12-Jul-19 02:02 AM Paper on Pyroelectric Crystal XRay and neutron generators: 12-Jul-19 02:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/A_Novel_Compact_Pyroelectric_X-Ray_and_Neu-42769.pdf 12-Jul-19 02:02 AM Also papers on neutron optics: 12-Jul-19 02:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Characterization_of_a_Neutron_Collimator_f-4A21C.pdf 12-Jul-19 02:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Neutron_Optics_-_Review-43310.pdf 12-Jul-19 02:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Neutron_Optics-CCB7B.pdf 23-Jul-19 01:27 AM https://ndiastorage.blob.core.usgovcloudapi.net/ndia/2009/fuze/IVAbaginski.pdf A nice little paper about how to do triggered spark gaps on PCBs 27-Sep-19 09:24 AM Does anyone have a driver schematic for a Pfeiffer 055 turbo pump? 27-Sep-19 09:24 AM Yes. One moment. 27-Sep-19 09:24 AM There used to be one on fuzor.net, but it's went missing now (links expired or got cleaned for data storage reasons) 27-Sep-19 09:25 AM https://i.spirit.re/BGQrU.zip 27-Sep-19 09:25 AM This is one of the controllers 27-Sep-19 09:25 AM There's like 3 or 4 that are compatible 27-Sep-19 09:25 AM If you're trying to build your own, don't follow the schematic at all. 27-Sep-19 09:27 AM haha, ok 27-Sep-19 09:27 AM TPH 055 27-Sep-19 09:27 AM there used to be a driver schematic on Fusor 27-Sep-19 09:27 AM Only have the meta picture google holds 27-Sep-19 09:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/B12gGw84tFGfAAAAAElFTkSuQmCC-4E8E8.png 27-Sep-19 09:27 AM cheers for the info, it's a good start 27-Sep-19 09:43 AM the tph-055 is a two-phase turbo with two hall effect sensors 27-Sep-19 09:43 AM all you need to do to drive it correctly is two comparators going into the interrupts of a microcontroller 27-Sep-19 09:43 AM and two fet drivers, with two fets 27-Sep-19 09:43 AM it can also be a four phase turbo if it's one of the older weirder builds 27-Sep-19 09:43 AM same idea, different drive sequence. 27-Sep-19 10:50 AM I can only see one hall effect sensor? 27-Sep-19 10:50 AM https://i.imgur.com/qrwuOHY.png 27-Sep-19 10:50 AM Why do turbos use wierd-ass motors? 27-Sep-19 10:50 AM not just normal brushless 3 phase? 27-Sep-19 10:56 AM newer ones use 3ph 27-Sep-19 10:56 AM and it appears you have a single hall sensor, huh 27-Sep-19 10:56 AM well that's right, you only need to encode two states 27-Sep-19 10:56 AM phase 1 and phase 2 27-Sep-19 10:56 AM you only need one hall 27-Sep-19 10:58 AM x3 27-Sep-19 10:58 AM trying to find a replacement connector 27-Sep-19 10:58 AM the existing one on the pump is all nasty and soldered to 27-Sep-19 10:58 AM 97814 6173-12-8P-SP2-M134 9909 27-Sep-19 11:26 AM https://www.mouser.co.uk/ProductDetail/Amphenol-Aerospace/PT02H-12-8P?qs=B64PmM8FL4h2LZWwl6FfRA%3D%3D 27-Sep-19 11:26 AM oowww 27-Sep-19 11:26 AM given the resistance of the coils is only 0.9 Ohms 27-Sep-19 11:26 AM any idea on what current I should limit it to safely? 27-Sep-19 11:26 AM etc. 27-Sep-19 11:47 AM I believe the starting current is around 2-3A 27-Sep-19 11:47 AM but mine starts happily at 1A 27-Sep-19 11:47 AM the turbo motors are mostly run by voltage - the speed is so high, the back-emf requires very high voltages to overcome, but not very much current to sustain the rotation speed 27-Sep-19 11:47 AM most small turbos take 5-15W to sustain, but up to 50-100W to start, and the current doesn't drop at low speeds(low back-emf), so you have to limit it 27-Sep-19 12:09 PM hmm ok 27-Sep-19 12:09 PM just want to protect it. 27-Sep-19 12:10 PM current just equates to the acceleration rate 27-Sep-19 12:10 PM you can probably start it at 100mA if you're careful 27-Sep-19 12:38 PM hmm ok 27-Sep-19 12:38 PM can't find me fets 27-Sep-19 12:38 PM gonna have to order some in. 27-Sep-19 01:14 PM I will kindly remind everyone that this channel is for links to useful resources, like the link to KF oring sizes @Deleted User posted in General. Not for discussion of hacking on stuff. 27-Sep-19 01:15 PM A list of KF flange o-ring sizes: https://www.marcorubber.com/o-ring-kf-centering-rings.htm If you can't buy vacuum-specific, look for "FKM" or "FKP" o-rings, they're physically identical. Viton is a trade name. 27-Sep-19 01:34 PM The pheiffer turbos we had at work ware limited by the temperature, not the current. 27-Sep-19 01:34 PM So on startup you'd run it at 3-4A turbo current and it would naturally taper off as the gasload got smaller. 27-Sep-19 01:37 PM cheers 27-Sep-19 01:43 PM (people, pls, move over to #general ) 18-Dec-19 06:57 AM Ultra-fast Optics Lecture Notes: 18-Dec-19 06:57 AM https://drive.google.com/file/d/1WcgD5KbQnAZOjUXMLqtSiOqjZvLEtMZc/view?usp=sharing 14-Jan-20 12:31 AM <__ice9#6039> https://www.osti.gov/servlets/purl/1474581 14-Jan-20 12:31 AM <__ice9#6039> Nice monograph on metals processing with FeCrAl (Kanthal) alloys. Mostly known for heating elements in air, but I have also found short spikes useful for things like Tesla coil discharge electrodes (can be soldered to copper after light sanding, using an inorganic stainless steel soldering flux like Superior №71). I think they could be a nice substitute for platinum crucibles under a pretty wide range of applications as well, but haven't been able to find one so far. Might try to make one when my argon induction furnace is ready. 17-Jan-20 09:25 PM <__ice9#6039> Fairly general vapor pressure calculator https://www.iap.tuwien.ac.at/www/surface/vapor_pressure 18-Jan-20 02:31 PM Conflat: https://www.lesker.com/newweb/flanges/flanges_technicalnotes_conflat_1.cfm CF2.75" OR DN40CF ISO: https://www.lesker.com/newweb/flanges/flanges_technicalnotes_iso_1.cfm Smaller stuff: KF16 OR NW16 Larger stuff: ISO160 (I have also seen NW160) Triclamp: Are you making beer? Looks like KF/NW but with a half-round machined in it... Seriously probably not really worth it for HV stuff like we want to do. Other stuff? Probably weird stuff that is hard to find as far as I currently know, avoid it if possible. 19-Jan-20 01:58 AM Somebody was asking about this recently, so for beginners, here’s some photo examples of vacuum flanges. These are KF flanges, with a cantering ring in the middle and a single “saddle” clamp that swings in to place to hold the clamp together. Roughing / foreline systems and some vacuum gauges are common example applications. 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image0-3A9CF.jpg 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image1-E2938.jpg 19-Jan-20 01:58 AM ISO flanges can be recognised by the multiple clamps that are separate components, usually 4 clamps. Turbomolecular pumps are a common application, and large sizes like 100mm or so are not unusual. 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image0-8EB62.jpg 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image1-46CD6.jpg 19-Jan-20 01:58 AM Conflat (CF) flanges bolt together with a knife-edge seal into a copper gasket, and are usually the only flange type with bolt holes. With no rubber gaskets used, high temperature and very low pressure use is possible. 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image0-5215D.jpg 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image1-89B2E.jpg 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image2-67A59.jpg 19-Jan-20 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image3-5152E.jpg 19-Jan-20 02:40 PM what is the foil for? i just got a foreline trap and it has some foil on top as well 19-Jan-20 03:01 PM In storage foil is for keeping things clean and free of contamination, in operation foil is wrapped around the entire system, under which you put heating elements for bakeout. To keep the heat in and keep them in the right positions. 19-Jan-20 03:02 PM ah 22-Jan-20 01:22 PM MDP 5011 info: http://www.wimmeralogic.com/adixen-alcatel/MDP-5011.html 24-Jan-20 01:59 PM http://web.mit.edu/8.13/8.13d/manuals/canberra/canberra-ge-gamma-spectrometer-systems.pdf 25-Jan-20 02:49 AM <__ice9#6039> I built a foreline trap containing internal heating elements with a pass-through. Fiberglass weave is also useful for external insulation as long as you cover it with something less prone to shedding glass splinters. 25-Jan-20 02:49 AM <__ice9#6039> Don't use Kevlar though. In spite of claims of high thermal breakdown temperature (which are technically true), localized hot spots will still offgas various benzyl compounds and ultimately cyanides. 25-Jan-20 02:49 AM <__ice9#6039> Glass is much safer. 26-Jan-20 12:09 AM <__ice9#6039> Here is how to make an oxygen concentrator with some solenoid valves, replaceable water filter media cartridges, and 5A zeolite molecular sieve -- can optionally go from 90-95% O2 to 95-99.X% O2 by removing the argon as well, but that also requires the comparatively more rare carbon molecular sieve 3A Takeda or similar 26-Jan-20 12:09 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/IMG_20200126_020715-E0257.jpg 26-Jan-20 12:09 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/IMG_20200126_020719-FD49A.jpg 26-Jan-20 12:09 AM <__ice9#6039> Speaking of which, I am looking to buy a small amount of 3A carbon molecular sieve, if anyone happens to have some on hand 26-Jan-20 12:20 AM that seems like the opposite of the system someone linked as part of a LN2 generation thing a guy built, very cool 26-Jan-20 12:42 AM http://homemadeliquidnitrogen.com/PSA/ 26-Jan-20 12:42 AM @__ice9 do you have the title/doi/link or anything for the paper your screenshots are from? 26-Jan-20 12:43 AM Please move any discussions or comments about the recources posted here to #off-topic-thats-sometimes-on-topic or #general 26-Jan-20 02:57 AM <__ice9#6039> Here is the original source: https://archive.org/details/NASA_NTRS_Archive_19920013240/page/n9/mode/2up 29-Jan-20 09:50 AM <__ice9#6039> https://twitter.com/__ice9/status/1222372150608384000?s=19 29-Jan-20 04:26 PM http://www.quartz1.com/price/techdata/Priemniki_i_detektory_izluchenij_2012.pdf 29-Jan-20 04:26 PM A list of all the Soviet/Russian geiger-muller, corona, and other radiation detectors. 31-Jan-20 09:43 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Screenshot_20200131-114327-56071.png 31-Jan-20 01:14 PM <__ice9#6039> https://www.montanainstruments.com/help/Window-Thickness-Calculator/ 31-Jan-20 01:34 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Vapor-pressure-of-selected-metals-04D8B.png 31-Jan-20 01:34 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Vapour-Pressure-Curves-for-Various-Materia-6035B.gif 31-Jan-20 02:08 PM https://www.mouser.de/datasheet/2/1/1380_ds-238325.pdf Interesting thingy 31-Jan-20 02:10 PM 3M makes everything 01-Feb-20 08:29 AM <__ice9#6039> Review article on metal-to-ceramic brazing, including which sorts of brazing rod alloys work best on various ceramics http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132003000400002 01-Feb-20 08:29 AM <__ice9#6039> For making hermetic seals mainly 01-Feb-20 08:37 AM <__ice9#6039> Cobalt oxide, a common glaze material: braze with 100% tin at 900C. Aluminum nitride: use indium with 1% titanium at 750C; works even better if about 20% silver is added. Alumina: 68.8%Ag-26.7%Cu-4.5%Ti (Ticusil) works on pure alumina without even metallizing it first (equivalently: it will metallize it) at 900C. Silicon carbide: use silver with 35% copper and 1% titanium (Cusil ABA) at 850C. 01-Feb-20 08:37 AM <__ice9#6039> Silicon nitride: use copper with 20% gallium and 8% titanium, though it requires heating to 1150C so inert gas protection may be needed 01-Feb-20 08:37 AM <__ice9#6039> Zirconia: use silver with 37% copper and 3% titanium at 1000C 01-Feb-20 08:37 AM <__ice9#6039> Ceramics can also be metalized by sputtering, ebeam PVD, CVD, or the W-Mo process (heating W-Mo powder blends rubbed into the surface of sintered ceramic materials to about 1300-1600C under a somewhat reducing atmosphere) 01-Feb-20 08:37 AM <__ice9#6039> TiH2 can be applied in a solvent and heated to 450C under inert atmosphere to metalize with titanium 01-Feb-20 08:37 AM <__ice9#6039> Apparently you can also just directly grind metal powders into the surface with frictional heating 01-Feb-20 08:37 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/1580575655931-55FD5.png 01-Feb-20 08:37 AM <__ice9#6039> Reminds me of friction stir welding 01-Feb-20 08:37 AM <__ice9#6039> The unusual brazing alloys listed above can be made at small scale using a cheap induction heater with a bit of flux, but care is required with those containing titanium: they are best formulated in vacuum or under argon. Titanium metal will burn at elevated temperatures. A stockpot containing the induction melter with the lid in place and a continuous flow of argon into the bottom is adequate. Similar techniques with shielding boxes are used for TIG welding titanium. 01-Feb-20 08:37 AM <__ice9#6039> It is also possible to use indium as a solder on a wide range of oxide ceramics by using an ultrasonic soldering iron, with substrate temp 170C and iron temp 300C-- http://materials-scientist.com/blog/2014/10/13/bonding-ceramic-sputter-targets-metal-holders/ The ultrasonic iron is used mainly to eliminate the need for flux, which keeps the resulting vapor pressure very low 02-Feb-20 06:45 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/signal-2020-02-02-084308-BED80.jpg 02-Feb-20 06:45 AM <__ice9#6039> Use stainless/monel/copper/fluoropolymers or oxygen-rated elastomers for oxygen lines and oil-free or fluorinated-oil pumps for compression 02-Feb-20 09:00 AM <__ice9#6039> Excellent chemical resistance charts for elastomers. https://mykin.com/rubber-chemical-resistance-chart 02-Feb-20 09:00 AM <__ice9#6039> FFKM is analogous to PTFE/FEP/PFA, with similarly outstanding performance, but it is extremely costly and in practice usually only obtainable as surplus o-rings from semiconductor etching facilities. So playing rock-paper-scissors with materials selection is usually necessary. 03-Feb-20 04:58 PM <__ice9#6039> High temperature getter materials and suitable operating temperatures 03-Feb-20 04:58 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Screenshot_20200203-140043-0BBDC.png 03-Feb-20 06:05 PM <__ice9#6039> Litz wire is good to about 2MHz 04-Feb-20 01:00 AM <__ice9#6039> Calculators for beta/x-ray/gamma shielding http://athopkins.stanford.edu/shields.html http://www.radprocalculator.com/Gamma.aspx 04-Feb-20 02:10 PM <__ice9#6039> Very thorough overview chapter on x-ray technology 04-Feb-20 02:10 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/halmshaw1995-4512A.pdf 04-Feb-20 10:51 PM Saved a copy of that for a rainy day! 05-Feb-20 07:23 PM <__ice9#6039> Ultrasound safety information and power level reference guidance for various applications-- useful if you are interested in ultrasonic welding of plastics, flux-free ultrasonic soldering/brazing of fittings for ultra-high vacuum, etc https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/radiation/guidelines-safe-use-ultrasound-part-industrial-commercial-applications-safety-code-24.html 05-Feb-20 07:39 PM <__ice9#6039> Example of soldering a copper wire to a glass microscope slide with an ultrasonic soldering iron-- https://www.youtube.com/watch?v=NpJ8T8JWMMw 05-Feb-20 11:49 PM https://www.cambridge.org/core/journals/microscopy-today/article/simple-cleaning-method-for-penning-gauges/E2EF04924D9A9638D9BD1434B9254AA0 06-Feb-20 05:23 AM RIP my ears 06-Feb-20 09:34 AM @nmz787 06-Feb-20 09:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Agilent_IDP-15_Dry_Scroll_Vacuum_Pump_Tip_-7937B.pdf 07-Feb-20 11:54 AM <__ice9#6039> Text chapter on neutron generators, with emphasis on improving the efficiency of beam-on-target systems. Discussion begins on page 10 of the PDF after some preliminaries on certain particulars of vacuum tubes. 07-Feb-20 11:54 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Pch8-C5831.pdf 07-Feb-20 11:54 AM <__ice9#6039> Discussion of neutron shielding. A saturated solution of boric acid in water, often as stacked rectangular jugs or absorbed into polymers or plastic masses, is one of the more effective approaches. https://www.nuclear-power.net/nuclear-power/reactor-physics/atomic-nuclear-physics/fundamental-particles/neutron/shielding-neutron-radiation/ It should be emphasized that a neutron generator operating at e.g. 3.7*10^10 n/s, fairly typical of a well-optimized compact BoT generator, is equivalent to 1 Curie of activity. Shielding is extremely important. 08-Feb-20 12:05 AM http://athopkins.stanford.edu/shields.html Half-value layer attenuation calculator(pay attention to energy/HVL thickness!) 08-Feb-20 12:05 AM https://www.nde-ed.org/EducationResources/CommunityCollege/Radiography/Physics/HalfValueLayer.htm Cheat-sheet for lead HVL at specific energies to input into the above 08-Feb-20 11:52 PM <__ice9#6039> Here's a quick instructional guide to the Brashear process. This allows using a slightly strange blend of chemicals to plate a silver mirror onto... essentially anything. Glass, plastic, most metals, ceramics, pretty much anything insoluble in a dilute acid solution: http://www.ilpi.com/glassblowing/tutorial_silvering.html 08-Feb-20 11:52 PM <__ice9#6039> (The reason this works is somewhat disturbing: the formation of silver fulminate in situ, followed by its surface-mediated decomposition to plate the silver onto anything it can touch. Whatever you do, do not ever allow the mixed solution to dry out.) 09-Feb-20 02:12 PM <__ice9#6039> Particular chemical suppliers I have found the most useful (USA): Duda Diesel - the most common acids, bases, salts, and commodity elements, with bulk discounts. Sulfuric, hydrochloric, nitric, citric acid. KOH, NaOH. KNO3, sulfur, etc. Right Price Chemicals - very cheap solvents, has all the common ones and some less common as well, great for plastics processing and materials science in general. Other items usually more expensive. HiMEDIA on Amazon - very cheap specialty chemicals, unusual salts especially, useful for preparing others by metathesis and similar, occasional uncommon acids like e.g. chloracetic, polyphosphoric, etc. Lab Alley - specialty chemicals like the monoethanolamine I bought for a CO2 scrubber; usually more expensive but does not restrict sales to institutions. eBay - lots of people who buy in bulk and split it out for sale, always worth checking alongside Amazon as a first pass, but try the ones above as they are often cheaper for the categories listed 09-Feb-20 02:12 PM <__ice9#6039> BioMall.in also looks interesting for difficult-to-obtain, highly-reactive reagents as well. The kind that tend to appear in old inorganic chemistry manuals, that retail chemical vendors no longer stock. Also has some rare superacids and acid anhydrides. $500 minimum order to avoid $50 packaging fee, but extremely cheap items. Based in India. Seems to have favorable feedback, but I have not yet placed an order so I cannot speak personally on this one. Honorable mention. 09-Feb-20 02:12 PM <__ice9#6039> For chemical glassware, eBay is great. Special mention for deschem, a particularly good seller. 09-Feb-20 02:47 PM <__ice9#6039> Also, if you need quartz glassware, yukangquartzglass_5 provided an excellent quality flask for me for a high temperature acid pyrolysis experiment 09-Feb-20 06:35 PM <__ice9#6039> Crucible material compatibility guide, including notes on process compatibility: 09-Feb-20 06:35 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/compatibility_crucible-8F6B9.pdf 10-Feb-20 02:29 PM https://www.researchgate.net/publication/225098580_Measurement_of_the_dynamic_response_of_the_CERN_DC_spark_system_andpreliminary_estimates_of_the_breakdown_turn-on_time Might be interesting for @Applied_Ion and / or @qualia 11-Feb-20 04:07 PM <__ice9#6039> Water/liquid cooling pressure drop calculator for different tubing sizes: https://www.dripdepot.com/irrigation-calculators/pressure-loss-calculator I used this to determine that the graphite furnace external water cooling needs to use 3/8" or 1/2" tubing-- that 1/4" is woefully inadequate for a flow rate of several GPM through 15-30 feet of tubing 11-Feb-20 04:07 PM <__ice9#6039> This calculator in turn helps you determine what flow rate you need-- http://www.nessengr.com/technical-data/water-cooling/ 12-Feb-20 12:54 AM "a design chart for long vacuum pipes and shells" https://lss.fnal.gov/archive/test-tm/1000/fermilab-tm-1378.pdf 12-Feb-20 03:25 PM <__ice9#6039> Beware of buckling, granted. 12-Feb-20 05:13 PM yarrrr! 13-Feb-20 05:34 PM http://esh-docdb.fnal.gov/cgi-bin/RetrieveFile?docid=1058&filename=132.htm&version=2 report done on the efficiency reduction of various things (sandwich bags, gloves, etc) used to cover frisker probes to keep 'em from getting contaminated (in a biological setting, but also potentially appropriate for e.g. measuring/scavenging messy ores, etc). #mildlyinteresting 14-Feb-20 02:34 PM Bestimmung der massebezogenen Aktivität von Radionukliden 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/aequival-massakt_v2013-07_bf-271EB.pdf 14-Feb-20 02:34 PM Kernphysikalische Daten 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/kernphysikalische_daten_bf-A0B72.pdf 14-Feb-20 02:34 PM Bestimmung des Kaliumgehaltes über die Kalium-40-Aktivitöt 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_aequival_gehalt-70A43.pdf 14-Feb-20 02:34 PM Grundlagen der Radiochemie 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/rad-chem-grundl_v2011-07_bf-C77F3.pdf 14-Feb-20 02:34 PM Das Kalium-40-Äquivalent 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_aequival_kalaequ-61001.pdf 14-Feb-20 02:34 PM Vorsatzzeichen (Präfix) für dezimale Vielfache und Teile der SI-Einheiten 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/vorsatzzeichen_praefix-71704.pdf 14-Feb-20 02:34 PM Laborexterne Qualitätskontrolle 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_quako_extern-9295E.pdf 14-Feb-20 02:34 PM Verfahren zut statistischen Auswertung von Daten mit als " Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_dokum_stataus-C448E.pdf 14-Feb-20 02:34 PM Umrechnung von Einheiten von radiologischen Größen 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/umrechnung_radiologische_groessen-987DA.pdf 14-Feb-20 02:34 PM Symbole für physikalische Größen und Einheiten 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/formelzeichen_groesse_einheit_bf-829F3.pdf 14-Feb-20 02:34 PM Laborinterne Qualitätskontrolle 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_quako_intern-EA51E.pdf 14-Feb-20 02:34 PM Genauigkeit von Messwerten, Empfehlungen zur Dokumentation 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_dokum_genau-E24AF.pdf 14-Feb-20 02:34 PM Kennzeichnung der Messanleitungen 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_kennung_bf-80F57.pdf 14-Feb-20 02:34 PM Störungen bei der gammaspektrometrischen Bestimmung von Spalt- und Aktivierungsprodukten 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_gamma_stoerng-3286A.pdf 14-Feb-20 02:34 PM Verfahren mit linearer Entfaltung 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/erk_nachweisgr_iso_03-11934.pdf 14-Feb-20 02:34 PM Nulleffektlinoien bei der Gammaspektrometrie mit Germaniumdetektoren 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_gamma_nullef_bf-35FE6.pdf 14-Feb-20 02:34 PM Grundlagen 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/erk_nachweisgr_iso_01-E3083.pdf 14-Feb-20 02:34 PM Gammaspektrometrische Bestimmung der Aktivitäten natürlicher Radionuklide 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_gamma_natrad_bf-F3FB0.pdf 14-Feb-20 02:34 PM Verfahren ohne lineare Entfaltung 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/erk_nachweisgr_iso_02-B3E72.pdf 14-Feb-20 02:34 PM Grundlagen der Gammaspektrometrie 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_gamma_grund_bf-FEF37.pdf 14-Feb-20 02:34 PM Alphaspektrometrie 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_alpha_grund-15257.pdf 14-Feb-20 02:34 PM Grundlagen und Hinweise zur Messung von Ortsdosis und Ortsdosisleistung 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/strlsch_messungen_od_od_grund-4A67C.pdf 14-Feb-20 02:34 PM Nachweis- und Erkennungsgrenzen verschiedener Messmethoden 14-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/erk_nachweisgr_bf-84642.pdf 14-Feb-20 07:03 PM Whoa there... We need some context for all those PDFs, at least for search indexing 15-Feb-20 12:04 AM ah, sorry ^^ 15-Feb-20 12:04 AM loads of measurement tutorials for all kinds of radiation, including chemical separation for alpha spectroscopy and whatnot 15-Feb-20 12:04 AM sadly it's all in german 15-Feb-20 06:46 AM You could edit in short descriptions for each pdf. 16-Feb-20 12:13 AM <__ice9#6039> Minimum bending radius information for various diameters of fused silica fiber optic cables (large diameters are commonly used in laser and spectroscopy applications), including some background details: https://dev.amadamiyachi.com/wp-content/uploads/2019/02/MBR.pdf 16-Feb-20 12:13 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Fiber_Optics_-_Minimum_Bending_Radius_-_MB-B51D3.pdf 16-Feb-20 11:49 AM You *should edit in short descriptions for each pdf. Please 17-Feb-20 03:29 AM http://oldweb.reak.bme.hu/Wigner_Course/WignerManuals/Budapest/THERMAL_NEUTRON_FLUX.htm Very nice exercise for determining neutron flux, might be something for the fusor folks here 19-Feb-20 06:39 AM <__ice9#6039> Reference data for extending the use of C-type tungsten-rhenium thermocouples from the usual ceiling of 2330°C to about 3000°C, subject to some loss of durability toward the higher end of that range 19-Feb-20 06:39 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/6a9875afda1e2207711e6c7c433f0078571d-A8156.pdf 19-Feb-20 06:39 AM <__ice9#6039> Note these are only acceptable in vacuum or inert/reducing atmospheres, and the latter will result in much better service life due to limiting the rate of evaporation. 19-Feb-20 06:39 AM <__ice9#6039> Details of thermocouple sheath and insulation begin to become relevant as well; avoid contact with any object in the hot zone 19-Feb-20 03:21 PM Anyone got literature on making accelerators with ion implantation intentions? 20-Feb-20 12:06 AM <__ice9#6039> Mixing 20-50% synthetic ester oil or ordinary vegetable oil into mineral oil slightly increases DC dielectric strength and greatly increases AC dielectric strength very cheaply. 20-Feb-20 12:06 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/signal-2019-11-02-152147-1-1-BF2AD.png 20-Feb-20 12:06 AM <__ice9#6039> https://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-plasma-welding-and-fab/atomic-hydrogen-welding-210886/ Reference with indicative flow rates, power levels, and output power density on target for atomic hydrogen torch welding 20-Feb-20 12:06 AM <__ice9#6039> It is much hotter than oxy-acetylene. It also requires no gas bottle as it can be run directly from an electrolyzer, provided the gas stream is dehydrated on the way (zeolite or silica gel are ok) 20-Feb-20 12:06 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/1582186151024-F5FF5.png 20-Feb-20 12:06 AM <__ice9#6039> A modern version can be assembled from two TIG torches held together by cable ties, using thick electrodes, running from an old-fashioned AC buzz-box welder or modern AC TIG welder. 20-Feb-20 12:06 AM <__ice9#6039> No arc start is needed, since burning hydrogen already conducts electricity 20-Feb-20 04:18 AM <__ice9#6039> Parker o-ring reference guide ORD 5700-- contains very extensive tables of chemical compatibility with many common elastomers. The pdf is too large to upload directly, but latest version can be found on Google by searching "Parker's_O-Ring_Handbook.pdf". Here is a link to the current one: https://www.parker.com/literature/O-Ring%20Division%20Literature/ORD%205700%20Parker_O-Ring_Handbook.pdf 20-Feb-20 09:08 AM So does anyone here use Zotero? it's a really nice way to synchronize resources/references 20-Feb-20 10:50 AM I used to @idmb but got lazy 20-Feb-20 03:30 PM I tried Zotero as a means of escaping the wretched grasp of Mendeley, but could not get the mobile version working to my satisfaction 20-Feb-20 03:30 PM I may again at some point, 'cos Elsevier can suck it 22-Feb-20 09:11 AM https://www.sciencedirect.com/science/article/abs/pii/S0167931720300277 22-Feb-20 09:11 AM Cleanroom in SEM 22-Feb-20 09:11 AM Sputtering, evaporator, deposition, substrate heater 23-Feb-20 08:04 PM https://doi.org/10.1063/1.92355 cool paper on Capillaritron ion source 24-Feb-20 11:05 PM A User's Guide to Vacuum Technology John F. O'Hanlon 24-Feb-20 11:05 PM Ran into it at the book store today, really good basics 24-Feb-20 11:49 PM can confirm, o'hanlon's an Excellent read, if a bit oldschool 26-Feb-20 07:44 AM Yeah. Another +1 for that book. Be warned though that they had many revisions and sometimes they pulled out older information as it was seen to be obsolete. 26-Feb-20 07:44 AM I have both old and new. 26-Feb-20 02:05 PM 3rd ed (2003) is on libgen 28-Feb-20 03:58 PM GAMMA SPEC Softwares: * [https://www.jimfitz.co.uk/fitzpeak.htm FitzPeaks Gamma Analysis and Calibration Software] You will need KB917607 for windows help files to work under modern operations systems (Windows 7 64-bit) * [https://www.effemm2.de/spectragryph/ Spectragryf] * [http://www.spectrumtechniques.com/software/USX_USB%20x32%201_1_07a.exe Spectrum Techniques UCS20 Software] * Canberra Genie 2000 [https://www.kb.sit.auckland.ac.nz/2013/10/25/department-of-physics/ Not Free. Requires a hardware key that is likely sentinel-based] * [https://arxiv.org/pdf/1511.04362.pdf Other software per paper: "Evaluation of Peak-Fitting Software for Gamma Spectrum Analysis"] GammaVision * Ortec / Does not seem to be free [http://www.iki.kfki.hu/nuclear/hypc/index_en.shtml HypermetPC] * Free VISPECT SAANI Supposedly open-source but seems to be unobtanium. Might want to contact them. Looks like this is a rewrite of Vispect IDeFix WinDIMEN 28-Feb-20 04:19 PM @Applied_Ion You mentioned SEM Monte-Carlo sim at some point. In case you haven't come across it, NIST's DTSA also does this. 28-Feb-20 04:29 PM @PeterZieba yes, CASINO is a free simulation software for ebeam simulation for SEM Sim. Never heard of DTSA, but I'll look into it. Here is the link for CASINO: https://www.gel.usherbrooke.ca/casino/index.html 28-Feb-20 10:33 PM Speaking of simulation -- Geant 4. It's like RollerCoaster Tycoon for radiation, except with no graphics. 28-Feb-20 10:33 PM https://geant4.web.cern.ch/ 29-Feb-20 07:23 AM <𝓕ermion#6024> I wonder if CASINO would be useful for lithography. 06-Mar-20 10:30 AM *Link is directly to a pdf download A while back I found this small technical note on laser beam combining with an emphasis on scalable architectures that allow for coherent beam combining for laser weapon systems/industrial use. It's probably beyond the means of anyone here to practically use, but I think it's pretty cool/really impressive. Plus, it starts out with more basic beam combining techniques that are much more tractable (eg dichroics, prisms). 06-Mar-20 10:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Laser_beam_Combining-D8CE3.pdf 24-Mar-20 01:19 PM Cute little charge sensitive amplifier in there 24-Mar-20 01:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/emirhan2016-79B40.pdf 24-Mar-20 01:19 PM @LRM 24-Mar-20 04:34 PM https://e2e.ti.com/support/amplifiers/f/14/t/584377 24-Mar-20 04:34 PM Here's a simple transimpedance amplifier design with a JFET input and a super low noise high performance op-amp 24-Mar-20 04:34 PM Or, skip the JFET to save some $$ if the transimpedance gain does not need to be too high, as is the case for most NIM applications, except for tiny PIN diodes 24-Mar-20 04:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/unknown-E4F99.png 24-Mar-20 05:23 PM Would there be any performance benefits to using discrete RF transistors as opposed to modern low noise op-amps? I'm curious because a lot of NIM stuff at the professional level still use some variation of the circuit in that paper, since it was developed forever ago by BNL 25-Mar-20 02:21 PM Dunno if RF transistors are the right tool here. Unless you count Jfets as RF transistors 25-Mar-20 02:21 PM as IIRC SiGe for example has worse noise than silicon or GaAs. 25-Mar-20 07:19 PM So that's what's confusing me... I'm pretty sure noise and slew rate are the only things that matter here and the modern JFETs and op-amps seem hard to beat with discrete transistors 25-Mar-20 07:19 PM Here is the LTSpice model for Cremat's charge sensitive preamp 25-Mar-20 07:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/unknown-A63D7.png 25-Mar-20 07:19 PM And yeah, it's essentially the same circuit as the one in the first link I posted. Naturally, they didn't specify exactly what op-amps were used nor put in noise parameters for the two generic op-amps in the model 25-Mar-20 07:19 PM And here's the shaping amplifier 25-Mar-20 07:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/unknown-49EC0.png 05-Apr-20 02:28 AM https://www.purdue.edu/discoverypark/birck/files/Plasma_RIE_Etching_Fundamentals_and_Applications.pdf 09-Apr-20 03:15 PM https://hackteria.org/wiki/Wild_openQCM reposting here so it doesn’t get lost in #general 09-Apr-20 04:23 PM My Eagle .brd and .sch of the csa above 09-Apr-20 04:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/CSA-85D56.zip 12-Apr-20 01:01 PM Sargent-Welch 3135 Turbomolecular Vacuum Pump Repair http://www.rtftechnologies.org/general/welch3135turbo.htm 12-Apr-20 01:27 PM https://en.smath.com/view/SMathStudio/summary 12-Apr-20 01:27 PM A good free replacement for MathCad, Maple or Mathematica. Solves all your unit conversion needs! 13-Apr-20 01:32 AM Recorded video from a workshop at ESA a few months ago on plasma propulsion. This one is on diagnostics: https://livestream.com/esa/epiclectureseries2019/videos/198201036 13-Apr-20 01:32 AM Btw anyone know if @Applied_Ion on twitter is on this discord? 13-Apr-20 01:36 AM You just tagged him 13-Apr-20 01:49 AM Oops, he did not pop up in the menu for whatever reason 14-Apr-20 01:10 PM Kerr lens modelocking: https://arxiv.org/pdf/1501.01158.pdf 22-Apr-20 05:00 AM Not sure if this is relevant to anyone, but I just learned that phosphor bronze wets tungsten pretty well if you use borax as flux 22-Apr-20 12:00 PM https://Belljar.net 22-Apr-20 02:42 PM ^ there's tons of goodies hiding on that site. very cool to see that they've started updating again too! 22-Apr-20 06:46 PM Oh they’re doing new posts?? That’s exciting 23-Apr-20 09:43 AM How to make and use indium gaskets from indium wire: https://www.youtube.com/watch?v=h8DkUlI-Ngs 23-Apr-20 09:45 AM neat thing about indium is it's so soft you can just mush it back together after using it 23-Apr-20 09:45 AM and roll it back out into sheets 23-Apr-20 09:48 AM Yeah it can be made to cold weld to itself if the surface is clean enough. https://www.indium.com/blog/etching-indium-to-remove-oxides.php 23-Apr-20 09:48 AM https://www.indium.com/blog/cold-welding-use-this-unique-indium-property-to-your-advantage.php Makes it easy to create atomically perfect hermetic seals 23-Apr-20 09:48 AM Speaking of which-- apparently adding 1% zinc to galinstan greatly improves its ability to wet glass https://www.youtube.com/watch?v=cU8Us6AYljc 23-Apr-20 09:48 AM Adding a bit more indium and tin relative to the gallium component also appears helpful 23-Apr-20 01:31 PM Is indium toxic at all in such use cases? Or what if you wanted to heat it to de-scum it (i.e. oils and such), would it offgas toxic fumes? 23-Apr-20 05:19 PM the vapor pressure of indium is quite low 24-Apr-20 06:58 PM NorCal - Vacuum Chamber Design Guide 24-Apr-20 06:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/VacuumChamberDesignGuide-BA66C.pdf 25-Apr-20 01:22 PM Indium vapor pressure is pretty close to aluminium. And indium is not toxic as far as people know. 25-Apr-20 01:22 PM We have a lot of it at work and we only use gloves to prevent greasy fingerprints on it 25-Apr-20 03:38 PM molten silver chloride can be used to seal fluoride optics to glass, sapphire to glass, etc. https://aip.scitation.org/doi/10.1063/1.1716318 25-Apr-20 03:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/1.1716318.fp_-_calcium_fluoride_to_glass_s-89D59.png 25-Apr-20 05:28 PM using a leaded glass frit also works apparently https://sci-hub.tw/10.1080/713818970 25-Apr-20 05:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Screenshot_from_2020-04-25_19-26-42-F3DC3.png 25-Apr-20 05:28 PM https://sci-hub.tw/10.1088/0022-3735/11/10/002 25-Apr-20 05:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Screenshot_from_2020-04-25_19-27-54-1C6F8.png 25-Apr-20 05:28 PM A Review of the Soldering Glasses -- usually lead-borate glasses are used: http://downloads.hindawi.com/journals/apec/1975/509270.pdf 25-Apr-20 06:48 PM http://virtualglass.org/ Glass-blowing CAD simulator ? 26-Apr-20 03:26 PM https://www.degruyter.com/view/journals/nanoph/7/10/article-p1637.xml 26-Apr-20 03:47 PM "Their combination determines the overall stress within the ion-beam-affected top layer, which deforms the less affected bottom layer of gold. Our tests show that the tensile stress is dominant when FIB with an acceleration voltage of 30 kV is applied to a 80-nm-thick gold film " "the free-standing gold film in our case can be simplified into a bilayer model, i.e. the top amorphous layer with tensile stress and the bottom layer with deformation stress. In such a simplified model, when one end of the suspended structure is fixed, the [FIB induced] top tensile stress will cause the suspended structure to bend upward" 26-Apr-20 03:47 PM Alright, who are the customers for that, plz have them contact me 27-Apr-20 12:39 PM Spectra Physics empower 45 internals photos: https://qumoptly.github.io/laser/site/EMPOWER%2045%20DPSS%20laser%20haute%20energie.html (I've had a lot of trouble finding docs of old stuff from them) 27-Apr-20 07:42 PM https://www.rbdinstruments.com/blog/homemade-titanium-sublimation-pump/ Simple titanium sublimation pump build. 28-Apr-20 04:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Fundamentals_of_Vacuum_Technology-15464.pdf 28-Apr-20 04:50 PM I think this is what you're looking for, @niflheim 29-Apr-20 04:51 PM Apologies if speaking too much on basic subjects. 29-Apr-20 06:14 PM https://sci-hub.tw/10.1016/j.apradiso.2018.07.017 29-Apr-20 06:14 PM One chip multichannel analyzer implemented on a Zynq-7020 SoC. Performance can certainly be vastly improved with a discrete high performance ADC 07-May-20 07:27 AM http://nucleardata.nuclear.lu.se/toi/radSearch.asp 07-May-20 07:27 AM http://skuld.bmsc.washington.edu/scatter/AS_periodic.html 07-May-20 07:27 AM Some useful libraries for x-ray absorption edge energies and for general gamma energy search. I think Interspec presents the data a lot better though, you don't have to go through line by line deciding whether to ignore something or not 11-May-20 02:31 PM https://core.ac.uk/download/pdf/11534435.pdf 11-May-20 03:16 PM The Electric Organ of Mormyrid Fish Actively Adapts to Changes in Water Conductivity 11-May-20 03:27 PM Electric eel organs are essentially charge pumps if i recall correctly 28-May-20 02:11 PM Anyone has good recommendations for mid range oscilloscopes? I was put in charge of speking one at work and don't know what's up. I would like to be able to do HV and current probes, basic digital signal stuff and big plus if it has 4 channels 28-May-20 02:11 PM Don't care too much sampling frequency but big memory depth would be nice 28-May-20 02:12 PM for cheaper stuff the rigol 1054z would be my go-to 28-May-20 02:12 PM up to 24 mpoints! 28-May-20 02:13 PM wow that's surprisingly cheap 28-May-20 02:20 PM yep! 28-May-20 02:25 PM Lol half the fancy probes are more expensive that the whole damn scope 28-May-20 02:30 PM that's always the issue 28-May-20 02:31 PM It's work money so I am not too concerned. I have played with very nice scopes before but I never had to shop for them so no real idea where to start 28-May-20 02:48 PM I think old Lecroy disk drive analyzers are a great deal as a high bandwidth scope 28-May-20 02:48 PM https://www.ebay.com/itm/LeCroy-DDA-120-Disk-Drive-Analyzer-CPUP-1-GHz-64MB-Mem-8GS-s-4-Channel/173344457553 28-May-20 02:48 PM Note that you get 8 GS/s only if you use one channel 28-May-20 02:48 PM But this is probably not what you want for work 28-May-20 02:54 PM Hacked Rigol 1054 model 28-May-20 02:57 PM I just found a really inexpensive time-to-digital converter chip 28-May-20 02:57 PM https://www.sciosense.com/products/time-to-digital-converters/tdc-gpx2-time-to-digital-converter/ 28-May-20 02:57 PM 4 channels, 10 ps resolution, and 14 seconds measurement range 28-May-20 02:57 PM $35 from Mouser 28-May-20 03:04 PM really? 28-May-20 03:04 PM i've been thinking of attempting a rough tof-ms for a bit, and a nice tdc for cheap was what was holding me up 28-May-20 03:04 PM was thinking of trying fpga to do one, some neat papers about it 28-May-20 03:08 PM Oops, sorry, $55 28-May-20 03:08 PM https://www.mouser.com/ProductDetail/ams/TDC-GPX2-TRA?qs=gt1LBUVyoHlajl9LksNVFQ%3D%3D 28-May-20 03:08 PM An older one is available for $35 28-May-20 03:08 PM You mean implementing a TDC directly on the FPGA? Like using logic gates chained together as a ring oscillator? 28-May-20 03:10 PM https://arxiv.org/vc/arxiv/papers/1206/1206.0679v3.pdf 28-May-20 03:10 PM I tried it, it's complicated and probably not going to compete with this ASIC 28-May-20 03:10 PM I think the dynamic range is very limited 28-May-20 03:12 PM a cheap board like this would do great tho 28-May-20 03:13 PM I wish Xilinx or someone would just make an IP block for TDC 28-May-20 03:13 PM That would make FPGA TDCs competitive, picosecond resolution is rarely needed unless you're dealing with optical stuff anyway 28-May-20 03:13 PM I think in just a comparator or some fast amplifier, the propagation delay time jitter is on the order of 10s of picoseconds anyway 28-May-20 03:13 PM So you'll have to be really good to account for all of that before you worry about the resolution of the TDC 28-May-20 03:27 PM But if you really want to give it a go using an FPGA only, I found this thread to be very helpful: 28-May-20 03:27 PM https://forums.xilinx.com/t5/General-Technical-Discussion/TDC-on-ZYBO-Board/td-p/817194 28-May-20 03:51 PM Is that Rigol the one were you can get a keygen to unlock all the featuresÉ 28-May-20 03:51 PM ? 28-May-20 03:51 PM Yes 28-May-20 03:51 PM I bought mine already unlocked for the same price as retail, but the process isn't too difficult supposedly or at least was not at the time. Would recommend getting an older used one in case protections have improved since then. 28-May-20 03:53 PM The optional special functions such as memory expansion, serial bus trigger and decoder, extended trigger kit or real-time recording are now included in the free bundle BND-MSO / DS1000Z · The BND-MSO / DS1000Z bundle contains the options: SA-DS1000Z (decoding and trigger tools for serial buses RS232 / UART, I2C and SPI) MEM-DS1000Z (memory expansion to 24 Mpts memory depth) REC-DS1000Z (record function for real-time recording and playback of waveforms) AT-DS1000Z (extended trigger functions for the serial buses RS232 / UART, I2C and SPI, Runt, Windows, Nth Edge, Delay, Time Out). 28-May-20 03:53 PM seems like they gave up 28-May-20 03:53 PM Older FLIR cameras of a certain brand and model number series have a similar value -- iirc an entire series of them can be upgraded to all behave like the FLIR E8. 28-May-20 03:54 PM Yeah E4 to E7 cameras can be hacked to E8 28-May-20 03:54 PM Yeah exactly 28-May-20 03:54 PM Re: Rigol there is also a 50 MHz to 100 MHz unlock 28-May-20 03:54 PM I don't see that listed there 28-May-20 03:54 PM But I think most or all of the others are (?) 28-May-20 03:54 PM For the 1054 I mean 28-May-20 03:54 PM Turns it into a DS1104Z 28-May-20 03:54 PM Anyway 100MHz nominal 1GSa/s has been adequate for my needs, though I could see someone more interested in RF at higher frequencies probably needing something faster 28-May-20 03:59 PM Yeah we don't need really higher frequencies 28-May-20 03:59 PM it's mostly to poke around boards and record stuff 28-May-20 03:59 PM Maybe do some high voltage stuff 28-May-20 03:59 PM Apparently people still sell those https://www.conrad.at/de/p/voltcraft-vc-630-2-analog-oszilloskop-30-mhz-2-122421.html 29-May-20 07:36 AM I have a friend who swears by unlocked Rigols. That said, if it’s for work, I’d be hesitant to do anything like that, or buy one already unlocked. 29-May-20 08:39 AM We totally unlocked ours at work. Hahahaha 29-May-20 08:39 AM You can’t have a device like that around engineers and not have that happen at some point! 29-May-20 09:46 AM Yeah can probably buy the unlocked version 29-May-20 09:46 AM In mind a scope was like 2k for a shitty entry level one for some reasons 29-May-20 10:01 AM There was a group of EE students I know who had this underground dealership of the Analog Discovery USB scope + logic analyzer. Because it's required for a bunch of EE class, there's a huge supply of used ones here 29-May-20 10:01 AM Got mine for $80 29-May-20 11:35 AM I hate USB scopes, I want buttons and knobs 29-May-20 11:36 AM I only use it as a logic analyzer and signal generator really, not enough screen space on a laptop to display the waveform and do anything else 29-May-20 11:38 AM The sig generator function could be nice 29-May-20 11:38 AM I don't do enough digital stuff to use logic analyzers. 29-May-20 11:38 AM It also fits in my pocket, which is nice 29-May-20 11:38 AM I'm getting a Red Pitaya soon, but it's really meant to be a data acquisition module/platform rather than a scope 29-May-20 11:41 AM you can run a music control surface for your usb scope 29-May-20 11:41 AM tons just run midi commands so it's trivial 29-May-20 11:43 AM Well I'm tone deaf so it wouldn't be very useful for me 29-May-20 11:44 AM little gizmos like this: 29-May-20 11:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/81gN0DRdiiL-B3ABF.png 30-May-20 09:55 PM @Electric_ionland (at.lougrims) I have a well maintained DS2072A-S scope (already hacked to DS2302A-S) i should probably put in #swap-meet, 2 channel (2GSa/s 300MHz) + 2 channel siggen + USB/LAN (I take screenshots over LAN) 30-May-20 09:55 PM only reason I got a new one was to get 4 channels on my desk without taking up a ton of space (also why i got embedded siggen) 30-May-20 11:21 PM though don't know your requirements, let us know if you have specifics! i used to be all digital and tried to do everything from the computer (have a usb scope) but fell in love with having an external scope, less the buttons and more the external screen and no dependence on the computer (especially when doing weird things to it) 31-May-20 12:34 AM Having a machine that doesn't autoupdate is quite useful when you just want to get to work with the same muscle memory you previously trained to 31-May-20 12:34 AM And inevitably with software stuff, something stupid like a driver update causes a glitch or complete failure and you're stuck trying to rollback or get a special version of the software running 31-May-20 12:34 AM It's pretty much why I'm not doing folding@home with my GPU, because the GPU drivers somehow break CUDA routinely and it's too much work to go through the whole driver reinstall process whenever I notice the problem 31-May-20 07:32 PM what are you using CUDA For? 31-May-20 09:52 PM Folding@home is a crowdsourced protein folding solver thing, so it accelerates it 31-May-20 09:52 PM I've tried doing baidu's deepspeech a few years back (speach to text conversion), but got busy with other stuff an gave it up 02-Jun-20 10:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/synthesis-of-silveractivated-zinc-sulfide--C221D.pdf 09-Jun-20 01:41 PM https://arxiv.org/pdf/1710.08136.pdf 14-Jul-20 02:11 PM Found this from a couple years ago when I was reading up on working with vacuum stuff: 14-Jul-20 02:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Working_with_Ultra_High_Vacuum_UHV_-_Matth-056A7.pdf 14-Jul-20 02:18 PM Probably best vacuum-related slides are from CERN accelerator school.. https://cas.web.cern.ch/schools/glumslov-2017 There is a lot of another topics beside that (https://cas.web.cern.ch/previous-schools), but this is really complex but reasonably managable to read through 31-Jul-20 02:15 PM https://cds.cern.ch/record/439740/files/CERN-2000-010.pdf 02-Aug-20 07:38 PM https://mmrc.caltech.edu/Vacuum/Pfeiffer%20Turbo/Turbos.pdf 24-Aug-20 01:22 PM Pinout for Pfeiffer TPU 510 cable, one end is an A16 DIN 41622 connector and the other is like this: 24-Aug-20 01:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/connectorpng-86CBF.png 24-Aug-20 01:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/unknown-59DD2.png 24-Aug-20 01:22 PM I do not know what controller this specific cable was used with, but they seem generic. 27-Aug-20 02:05 PM I picked one up from RS components. The connector is mil spec. Using it for the TPU210 controller. 27-Aug-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image0-B2F89.jpg 27-Aug-20 02:15 PM Also on the pump side some pins are soldered together ie. N&P and S&F as shown. (TMH-260P) 27-Aug-20 02:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/image0-9EEBF.jpg 31-Aug-20 11:12 PM So I am thinking about counting photons and measuring the amplitude coming from photodetectors, etc for correlating with the beam, etc 31-Aug-20 11:12 PM and in the course of thinking about that problem 31-Aug-20 11:12 PM I found this: https://www.hackster.io/news/build-an-8-ghz-sampling-oscilloscope-with-analog-devices-adcmp582-comparator-46170ab456e8 31-Aug-20 11:12 PM I'm certainly keeping an eye on this project 31-Aug-20 11:58 PM There is also a talk about that project 31-Aug-20 11:58 PM and it is an okay watch 03-Sep-20 08:44 AM Amplifier design notes from Ortec for nuclear pulse processing: https://www.ortec-online.com/-/media/ametekortec/other/amplifier-introduction.pdf?la=en 11-Sep-20 12:52 PM https://sci-hub.tw/https://iopscience.iop.org/article/10.1088/0953-4075/49/19/193001 Really nice review paper on what I'm helping with with making a plasma jet, the method of cooling molecules through supersonic expansion is really thoroughly explained mathematically and conceptually in it 13-Sep-20 02:50 PM https://www.engineersedge.com/beam_bending/calculators_protected/circular_plate-bending.htm <-- decent calculator for deflection of circular plates 18-Sep-20 08:00 AM <0xDBFB7#9254> bio-world.com: lots of specialty chemicals and *-ware; most importantly, apparently ships safe items to residential addresses 18-Sep-20 08:35 AM that's handy, bookmarking! 18-Sep-20 10:54 AM <0xDBFB7#9254> In that case, c.f. VWR.com; Reagents require a vetted business address but other lab supplies ship anywhere. 18-Sep-20 11:25 AM i've always wondered if you could skirt those rules by using a forwarding service. technically they say you can't ship chemicals to them... but I can't imagine they really care much (assuming it doesn't spill... in which case you're probably in for a world of financial hurt...) 18-Sep-20 12:13 PM You can try, but VWR minds the forwarders because VWR is still fundamentally on the hook as the shipper under 49CFR. 18-Sep-20 12:16 PM <0xDBFB7#9254> reading the story of https://en.wikipedia.org/wiki/Steve_Kurtz makes me pretty wary of any workarounds 18-Sep-20 12:16 PM <0xDBFB7#9254> even with a valid incorporated business, corporate email, proof in tax reciepts, etc, I've already gotten some strongly-worded emails regarding the fact that we're not in the right field of business. 18-Sep-20 02:49 PM yikes 18-Sep-20 02:49 PM well nevermind then 25-Sep-20 09:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/PGT_Gamma_and_Xray_Detectors_Rev1_200507-17DB0.pdf 25-Sep-20 10:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/2002CP-6CCCE.pdf 25-Sep-20 10:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/ln2board-43DA0.pdf 25-Sep-20 10:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/TRP-N-86ABF.pdf 25-Sep-20 10:40 AM Canberra 2002 preamp 25-Sep-20 10:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/2002_Circuit_description-BCD41.pdf 25-Sep-20 10:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/2008_preamp-D6355.pdf 28-Sep-20 04:19 PM Turbopump technical notes from Varian: 28-Sep-20 04:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/turbo_pump_operation-E4CBC.pdf 02-Nov-20 04:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/20201102_164715-80CDB.jpg 02-Nov-20 04:48 PM I found a manual for the 5400CP and turns out it indeed can run in any orientation 02-Nov-20 06:45 PM A friend of mine who used to work for Varian told me that although they can run in any position they will probably last longer facing up or down 02-Nov-20 06:51 PM It says indeed the preferred position is up or down 02-Nov-20 08:13 PM I just want a cable or at least a pi n out diagram of the cable for my TMP 360 pump. Is that too much to ask?? It’s not in the manual. Evidently they intentionally hid it. 02-Nov-20 08:15 PM I meant to measure the cable for you 02-Nov-20 08:15 PM I think the one for our Leybold 150 should work ? 02-Nov-20 09:26 PM Should be the same one 02-Nov-20 09:57 PM You just want the pin diagram for each end of the cable right? 03-Nov-20 08:57 PM Yes 03-Nov-20 08:57 PM @idmb yes. That’s all I need 04-Nov-20 06:50 PM @Charles here you are! Leybold cable for this pump and this controller 04-Nov-20 06:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/IMG_2918-81AFB.JPG 04-Nov-20 06:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/IMG_2919-B7031.JPG 04-Nov-20 06:50 PM https://discord.com/channels/513115950501855256/513115950501855261/773339202149810207 04-Nov-20 07:31 PM Thank you very much 19-Nov-20 06:46 PM Canberra 9615 manual: 19-Nov-20 06:46 PM http://www.nuclearphysicslab.com/npl/wp-content/uploads/canberra_9615_ICB_Amplifier.pdf 23-Nov-20 10:00 AM @Mason_Yu the chapter I’d been meaning to send for a few days now 23-Nov-20 10:00 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Ortec_Gamma_X_Chapter_4-F668B.pdf 23-Nov-20 10:00 AM that explains the problem with the 450 amp I think 23-Nov-20 10:29 AM Yeah the reset pulse must be dealt with at the amplifier level, gating the ADC or using constant fraction discriminators just doesn't work very well 03-Dec-20 08:09 PM STL files for the manual valve openers for the pneumatic VAT valves. Didn't end up putting in the more aggressive cam profile since the pin is at the limit. https://www.thingiverse.com/thing:4674177 03-Dec-20 08:44 PM Oh snap 03-Dec-20 08:44 PM Nice 03-Dec-20 08:44 PM @Mason_Yu that link 404s 03-Dec-20 09:11 PM Apparently I must wait 24 hours before publishing a design on Thingiverse, it should work in a few minutes now since the account was registered 23 hours ago. But here are the STL files directly 03-Dec-20 09:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Base_plate-E37CE.stl 03-Dec-20 09:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Cam_lever_female_socket-3C8BA.stl 03-Dec-20 09:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Cam_lever_male_pin-DE4BE.stl 03-Dec-20 09:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Pivot-DDF10.stl 03-Dec-20 09:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Valve_puller-CDCA2.stl 03-Dec-20 09:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/PXL_20201204_034915627-31491.jpg 04-Dec-20 01:00 AM This is a decent intro to liquid scintillation counting in general 04-Dec-20 01:00 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/LSABooklet_Kessler-15190.pdf 04-Dec-20 01:00 AM Maybe a bit biased in certain ways but generally good 13-Dec-20 01:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Bicron_Surveyor_M_1986-8968C.pdf 13-Dec-20 01:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Bicron_Surveyor_M-E211E.pdf 13-Dec-20 01:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Bicron_Surveyor_M_Manual-FF9FE.pdf 13-Dec-20 02:30 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/ANALYST_TECNICAL_MANUAL-4E3F5.pdf 13-Dec-20 02:30 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20resources%20%5B513554071831969812%5D.html_Files/Bicron_Analyst-3D45A.pdf 13-Dec-20 02:43 PM https://www.nukeworker.com/study/instruments/manuals/Bicron_Micro-Analyst.pdf