Search found 420 matches

by ian_krase
Sun May 20, 2018 1:35 am
Forum: Vacuum Technology (& FAQs)
Topic: Foreline pump base pressure degraded
Replies: 0
Views: 49

Foreline pump base pressure degraded

Hello, everyone. I use a Pfeiffer Duo (the newer version with the white case) as a foreline pump. When I first got this (used) pump, it performed pretty well with about 8 microns of base pressure. Now, however, I can't get lower than about 60 microns. I didn't really notice since lately I've been us...
by ian_krase
Sun May 20, 2018 1:05 am
Forum: The Trading Post
Topic: WANTED: High Voltage Feedthrough
Replies: 2
Views: 107

Re: WANTED: High Voltage Feedthrough

Some people definitely do make their own.

Duniway Stockroom has an ebay page where they sell their surplus. Some interesting stuff there.
by ian_krase
Thu May 17, 2018 7:38 pm
Forum: New User Chat Area
Topic: HV feedthroughs
Replies: 3
Views: 217

Re: HV feedthroughs

You can find a large number of diy feedthroughs here with some searching.
by ian_krase
Mon May 14, 2018 6:42 am
Forum: New User Chat Area
Topic: How Have You Guys Made Your Inner Grids?
Replies: 3
Views: 205

Re: How Have You Guys Made Your Inner Grids?

For those not making seamless grids, tungsten can be bonded to itself and to stainless steel by spot welding.
by ian_krase
Fri May 11, 2018 4:17 am
Forum: New User Chat Area
Topic: Design Foundation?
Replies: 6
Views: 255

Re: Design Foundation?

To me, a "deuteron accelerator" evokes a Rapp Instruments style BOTtle.
by ian_krase
Fri May 04, 2018 7:04 am
Forum: New User Chat Area
Topic: Fusioneers in San Jose CA & Troubleshooting
Replies: 3
Views: 252

Re: Fusioneers in San Jose CA & Troubleshooting

I am in the area (actually work in San Jose) and my pump (and gauge) are portable. I could potentially see you during my lunch break or after work some day.
by ian_krase
Tue May 01, 2018 7:37 am
Forum: Images du Jour
Topic: MATER-1
Replies: 8
Views: 724

Re: MATER-1

You have a lot of resources.


You could try a beam on target with that high voltage low current supply.
by ian_krase
Fri Apr 20, 2018 6:13 am
Forum: Vacuum Technology (& FAQs)
Topic: Voltage/Pressure Tuning Advice
Replies: 9
Views: 564

Re: Voltage/Pressure Tuning Advice

To expand on the whole ballast and current control thing a bit: When gas discharges (arc or glow discharge) are struck, they go from being high impedance to very low impedance really, really quickly. This sort of thing isn't too much of a problem for your common everyday 0-60V 0-5A constant voltage/...
by ian_krase
Wed Apr 18, 2018 8:18 am
Forum: Vacuum Technology (& FAQs)
Topic: Voltage/Pressure Tuning Advice
Replies: 9
Views: 564

Re: Voltage/Pressure Tuning Advice

Have you got a ballast?
by ian_krase
Tue Apr 17, 2018 6:34 am
Forum: Vacuum Technology (& FAQs)
Topic: Can I make my own ConFlat flanges?
Replies: 27
Views: 929

Re: Can I make my own ConFlat flanges?

It's not needed to have conflat flanges for fusion. If you can do CNC machinist, an O ring groove is more than good enough.