Search found 823 matches

by Jerry Biehler
Fri Jul 20, 2018 7:13 am
Forum: Images du Jour
Topic: Killer deal on a GeLi gamma spec
Replies: 5
Views: 280

Re: Killer deal on a GeLi gamma spec

FWIW, Hf is used in plasma cutter tips, its that little silver piece in the center of the electrode, it melts and helps stabilize the arc.
by Jerry Biehler
Fri Jul 20, 2018 7:10 am
Forum: New User Chat Area
Topic: HV feedthrough purchase problems
Replies: 3
Views: 99

Re: HV feedthrough purchase problems

Call them. Do not rely on email.
by Jerry Biehler
Wed Jul 18, 2018 12:25 am
Forum: Images du Jour
Topic: Killer deal on a GeLi gamma spec
Replies: 5
Views: 280

Re: Killer deal on a GeLi gamma spec

Usually GeLi sensors are fine being warmed up, they are used in EDX as well on SEMs and TEMs. The issue is the beryllium window. If the dewar has been cold for years they tend to build up condensed vapors inside the dewar insulation since they are basically a cryopump. When the dewar heats up the pr...
by Jerry Biehler
Sun Jul 15, 2018 8:50 am
Forum: New User Chat Area
Topic: VACUUM CHAMBER
Replies: 5
Views: 280

Re: VACUUM CHAMBER

No, glass is fine for a lot of vacuum systems. They have been used for over 100 years and are still used. Plexi is an OK vacuum material as well there are commercial turbo pumped systems available with acrylic doors or bell jars. I have an 18x18" glass bell jar and it is very nice. I have had it dow...
by Jerry Biehler
Tue Jun 26, 2018 4:04 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Couple of questions
Replies: 24
Views: 1535

Re: Couple of questions

Roofing suppliers might have lead sheet.

You dont need a faraday cage, you are not working anywhere near the voltage that would require one.
by Jerry Biehler
Fri Jun 08, 2018 7:53 am
Forum: Images du Jour
Topic: Cryocooler
Replies: 1
Views: 576

Re: Cryocooler

It's a sumitomo cooler, you will need the compressor section to go with it. Probably something like this: https://www.ebay.com/itm/Sumitomo-MRI-Helium-CSW-71C-Compressor-Serie-47C02192D-With-Cry-Control-Unit/112995151231?hash=item1a4f092d7f:g:TRsAAOSwB09YPygw Though you could probably make a CTI com...
by Jerry Biehler
Fri Jun 08, 2018 6:33 am
Forum: The Trading Post
Topic: MKS 901p vacuum gauges
Replies: 7
Views: 1302

Re: MKS 901p vacuum gauges

I use RealTerm, probably the best terminal for techies out there that I have found. All sorts of cool options.
by Jerry Biehler
Mon Jun 04, 2018 8:35 am
Forum: Images du Jour
Topic: Gold Plasma
Replies: 7
Views: 966

Re: Gold Plasma

You sputtered a thin layer of something on there.
by Jerry Biehler
Fri Jun 01, 2018 5:16 am
Forum: New User Chat Area
Topic: Pneumatic gate valve trouble shooting
Replies: 12
Views: 1143

Re: Pneumatic gate valve trouble shooting

I have a pump similar to that that I pulled off on of my coating systems. If I could get $300 out of it I would be very happy. They are pretty much useless in this day and age for anyone doing coating when you can get cryo and turbo pumps and they dont need baffles or cryotraps.
by Jerry Biehler
Thu May 31, 2018 6:21 am
Forum: New User Chat Area
Topic: Pneumatic gate valve trouble shooting
Replies: 12
Views: 1143

Re: Pneumatic gate valve trouble shooting

Whoa, stop. This is a 6" ~2000l/s diffusion pump. Way, way to big for a fusor. Pneumatic gate valves are binary, open or closed, there is no in between. Technically you could only close them part way but it is going to be random where it stops. And even with controllable valves that will fit an ASA6...