Search found 740 matches

by Jerry Biehler
Fri Mar 26, 2021 5:05 am
Forum: Vacuum Technology (& FAQs)
Topic: Home built mass spectrometer, continued
Replies: 4
Views: 674

Re: Home built mass spectrometer, continued

Bad thing about channeltrons is they don't like to sit at air for long periods, I have a spare one for my RGA and it is in a 6" section of conflat with ends on it, one end had a copper tabulation so they can seal it off under vacuum.

A faraday cup is plenty sensitive for most RGA work.
by Jerry Biehler
Tue Mar 16, 2021 9:36 am
Forum: Control and Instrumentation Hardware and Software
Topic: Software to collect and display measured data.
Replies: 16
Views: 1213

Re: Software to collect and display measured data.

Yeah, there are lots of options for tabview. I have interfaced DIO units, multimeters, spectrum analyzers, spectrometers, interferometers, rf switches, just a ton of options. My vacuum system is all controlled and sequenced with labview using DIO, ADCs, and serial connections. The advantech stuff ha...
by Jerry Biehler
Sun Mar 14, 2021 1:19 pm
Forum: Control and Instrumentation Hardware and Software
Topic: Software to collect and display measured data.
Replies: 16
Views: 1213

Re: Software to collect and display measured data.

Labview is free for home use. It allows quick interface development and interfacing to a huge amount of instrumentation. Bit of a learning curve but it works well. https://www.ni.com/en-us/shop/labview/select-edition/labview-community-edition.html I recently used it to build an interface to control ...
by Jerry Biehler
Sun Jan 24, 2021 10:49 am
Forum: Vacuum Technology (& FAQs)
Topic: DIY Turbopump Controller
Replies: 31
Views: 4258

Re: DIY Turbopump Controller

I have an official schematic for the controller for these pumps. https://drive.google.com/file/d/0B1bUBQ6DCEwMTy15LThpQzRvVU0/view?usp=sharing There are about 4 drive models that will run this pump, the NT10, NT12, and NT13 as well as the NT50 which I have provided the schematic for. Sometimes these...
by Jerry Biehler
Mon Jan 18, 2021 6:21 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Low Cost Spectrometer and Plasma Spectroscopy
Replies: 2
Views: 486

Re: Low Cost Spectrometer and Plasma Spectroscopy

I have an assortment of different spectrometers. I do have one of the ocean optics ones that connects to a PCI card, another little serial based one acton spectrapro 150 and the big one I just got working again, a Optronic Laboratories 740A/D that I just got running https://hackaday.io/project/17598...
by Jerry Biehler
Tue Sep 01, 2020 11:28 pm
Forum: Vacuum Technology (& FAQs)
Topic: Foreline KF O-ring greasing
Replies: 4
Views: 1024

Re: Foreline KF O-ring greasing

If you are seeing that slow of a leak that levels out you probably has something outgassing in your foreline.
by Jerry Biehler
Tue Jul 28, 2020 3:50 am
Forum: Vacuum Technology (& FAQs)
Topic: Help Finding Documentation
Replies: 5
Views: 1720

Re: Help Finding Documentation

Yup, thats an ion pump. Probably came off a field emission SEM. Good for getting down to really low which the field emission emitter needs to live happily. Unless you plan on building a UHV system I would probably sell the pump itself on ebay. JEOL probably wont give you the time of day and they gen...
by Jerry Biehler
Sun Jul 26, 2020 11:40 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Australian Breakthrough Fusion (Duh, Chirp Lasers)
Replies: 12
Views: 2711

Re: Australian Breakthrough Fusion (Duh, Chirp Lasers)

Tripling YAG gets you 355nm, 266 for quadruple. But the losses go up every time you go up a harmonic where we were pushing 8W of green to get 2W of 266.
by Jerry Biehler
Mon Jun 22, 2020 9:52 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Transformer Input Meanings
Replies: 6
Views: 1545

Re: Transformer Input Meanings

P1 , P2, or P3 are your primary connections. SHLD is shield, the shield on the cable supplying the power to the primary. If there is a shield it might be a high frequency drive transformer which you will need to either get or build a drive for it. With the physical size of both being so small I woul...
by Jerry Biehler
Sun Jun 21, 2020 8:27 pm
Forum: Announcements and Site Administration Topics
Topic: Space X conversation Xfer
Replies: 4
Views: 1468

Re: Space X conversation Xfer

There is an array of switches below the touch screen for critical functions. But both screens can do the same functions so even if one screen died you still have the other. So first earth would have to lose control of the capsule, then both screens need to die. At that point so many things have gone...