Search found 292 matches

by Roberto Ferrari
Wed Jan 29, 2020 12:01 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Electrostatic lens sizing
Replies: 2
Views: 396

Re: Electrostatic lens sizing

Hi Patrick
Thanks for sharing.
Not useful for my project but a friend of mine, in struggle with an electrostatic accelerator will enjoy your info.
by Roberto Ferrari
Wed Jan 22, 2020 8:04 pm
Forum: Announcements and Site Administration Topics
Topic: Annual Fundraiser: Let's Try This Again
Replies: 6
Views: 381

Re: Annual Fundraiser: Let's Try This Again

Paul
Donation appears gone to Tanglewook Ventures.
Is it OK?
by Roberto Ferrari
Tue Jan 14, 2020 11:32 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Increasing use of cylindrical fusors
Replies: 5
Views: 457

Re: Increasing use of cylindrical fusors

Tim and Dan

But degassing until emptied of gasses, right?
Or do you think that there is a "push-pull" action, loading and outgassing, rytmically?
by Roberto Ferrari
Tue Jan 14, 2020 7:02 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Increasing use of cylindrical fusors
Replies: 5
Views: 457

Re: Increasing use of cylindrical fusors

Hi Jim

Please, comment on your experiences with titanium and degassing.
by Roberto Ferrari
Tue Dec 31, 2019 7:45 pm
Forum: Vacuum Technology (& FAQs)
Topic: Using diffusion pump oil in a mechanical pump
Replies: 6
Views: 239

Re: Using diffusion pump oil in a mechanical pump

Agustin Why do you start your long pursuit trying to use a wrong road? Mechanical pump oil has several properties, not only oriented to get a good vacuum but also to protect the steel parts inside the pump. Were are you based? Surely some provider of consumables for vacuum systems, as mass spectrome...
by Roberto Ferrari
Wed Dec 11, 2019 3:53 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1290

Re: 30keV Deuteron Source

Understood!
Thanks
by Roberto Ferrari
Tue Dec 10, 2019 9:21 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1290

Re: 30keV Deuteron Source

Hi Scott

Beside my earlier question, I have another one.
Einzel lens designs almost always have a gap of 0.1 D between lenses.
Why you gone further, enlarging the space between lenses? It is almost 0.5 D (being D the lens diameter)
by Roberto Ferrari
Sun Dec 08, 2019 1:57 pm
Forum: FAQs: Vacuum Technology
Topic: FAQ - The bell jar is back - sort of
Replies: 2
Views: 245

Re: FAQ - The bell jar is back - sort of

Richard
That is refreshing news!
Great return.
As an old vacuumist, I plan to sum my modest knowledge.
by Roberto Ferrari
Fri Dec 06, 2019 10:20 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1290

Re: 30keV Deuteron Source

Hi Scott
Really a beautiful setup.
What is that knob at the lower end of the glass tube?
Deuterium imput or one of the points for differential pumping you mentioned?
by Roberto Ferrari
Thu Oct 17, 2019 6:15 pm
Forum: Images du Jour
Topic: Cutting edge GM counter (1953)
Replies: 32
Views: 8314

Re: Cutting edge GM counter (1953)

Hi Mark

Thanks a lot for that file.
Very similar design.
Now I will struggle for devoting some time to the restoration.