Search found 3 matches

by Martin Hathaway
Sun Aug 31, 2014 4:08 pm
Forum: FAQs: High Voltage
Topic: FAQ: Measuring Fusor Current
Replies: 2
Views: 8413

Re: FAQ: Measuring Fusor Current

Why is it that when you isolate a center-tapped NST the case only floats one volt above ground while when you isolate a non-center-tapped transformer the case ends up floating to 7kV? And why is this so bad?

Martin Hathaway
by Martin Hathaway
Fri Jul 11, 2014 2:26 am
Forum: FAQs: Vacuum Technology
Topic: FAQ - Diffusion Pump - What you need to know!
Replies: 8
Views: 10939

Re: FAQ - Diffusion Pump - What you need to know!

This means that if I were to bring down my entire chamber all at once, the only valve I would actually need would be the one between the diffusion pump and the chamber, correct? I see no need for the foreline valve otherwise.

Martin Hathaway
by Martin Hathaway
Wed Jul 09, 2014 8:38 pm
Forum: FAQs: Vacuum Technology
Topic: FAQ - Diffusion Pump - What you need to know!
Replies: 8
Views: 10939

Re: FAQ - Diffusion Pump - What you need to know!

Why would one start pumping out just the foreline, then the diffusion pump, then finally the chamber instead of keeping all vacuum valves open and just pumping out the entire thing all at once? Does the air rush from the SATP areas to the low vacuum areas pose any significant problems when opening v...