Search found 2329 matches

by Carl Willis
Tue Feb 11, 2003 3:24 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High frequency high voltage generation
Replies: 10
Views: 6392

Re: High frequency high voltage generation

<r>Hi Larry,<br/> <br/> You'll find that the 6146 is an excellent, durable tube for small Tesla coils. Also on my website I describe a "plasma tweeter," which is one of the few other Tesla coil applications, that is exactly a 10 MHz, 6146 Tesla coil. Except it's not really a Tesla coil, more like a ...
by Carl Willis
Mon Feb 10, 2003 7:11 pm
Forum: Vacuum Technology (& FAQs)
Topic: Further testing
Replies: 5
Views: 3087

Re: Further testing

<t>Daniele, <br/> <br/> These pressures are quite high. You already mentioned some potential big fixes. (1) Get some real pump oil--it sounds like you may not have a low-vapor pressure oil in it right now?? (2) After new oil, bake the trap. The trap is actually a big enemy of good vacuum if it is di...
by Carl Willis
Mon Feb 10, 2003 6:44 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: High frequency high voltage generation
Replies: 10
Views: 6392

Re: High frequency high voltage generation

<r>Hi Larry,<br/> <br/> The CW tesla coil has been used most directly for high-energy x-ray tubes. In this case, the secondary winding is located in the vacuum chamber and the "hot" end of the winding holds a target for electrons. Use for ion linacs would be rather difficult for several reasons, how...
by Carl Willis
Mon Feb 10, 2003 7:28 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Operation observations- Carl Willis fusor
Replies: 5
Views: 4516

Operation observations- Carl Willis fusor

<t>To go along with below-posted construction info on my fusor system, here are some observations that I have made over my first couple weeks of neutron production.<br/> <br/> 1. Upper voltage and current limits: Max voltage is about 69 kV. this is both the limit of my x-ray pwr supply and the unins...
by Carl Willis
Mon Feb 10, 2003 6:54 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Construction notes-Carl Willis' fusor
Replies: 0
Views: 3816

Construction notes-Carl Willis' fusor

<t>Last night I was able to sustain my fusor's neutron yield near 30 mrem / hr for about eight minutes. For the record, I'll post some details of its construction here.<br/> <br/> Chamber: 8" 304 Stainless steel hemispheres from JG Braun (actually I think the reseller was named RB Wagner?? I bought ...
by Carl Willis
Tue Feb 04, 2003 7:00 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Other nuclear reactions in the Fusor
Replies: 0
Views: 1704

Other nuclear reactions in the Fusor

<t>Has anyone given thought to trying some non-fusion reactions in the fusor? After looking at some cross-section data from the EXFOR database, it seems that 19F(p, ag)16O might actually work at rather low voltages, albeit in pitiful yield. However, someone with a 2x2 NaI(Tl) crystal might be able t...
by Carl Willis
Thu Jan 23, 2003 1:17 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: I trust some reading was done.......
Replies: 8
Views: 6020

Re: I trust some reading was done.......

Would a simple RF ion source be a viable alternative to the duoplasmatron under discussion? As I recall reading in an older text, the glass RF ion source was supposed to be superior at sourcing high fractions of H+ (as opposed to H2+), with low pressures and low gas flow rates as well.
by Carl Willis
Wed Jan 22, 2003 9:26 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: We Have a workable Ion Gun
Replies: 13
Views: 9619

Re: We Have a workable Ion Gun

On the subject of Torr-seal, I believe that Hysol Epoxi-patch 1C is nearly
equivalent to Varian's epoxy and is much much cheaper. I have used Hysol 1C in
vacuum on many occasions and, as long as temperature extremes and ion beams
avoid it, it performs very well.
by Carl Willis
Sun Jan 19, 2003 7:10 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: BF3 counter experience
Replies: 4
Views: 2873

BF3 counter experience

<t>>Way to go Carl! I bet those first few "chirps" from your Ludlum 12-4 is an <br/> >experience you'll not soon forget. <continued from images du jour><br/> <br/> Thanks Jon, it was a pleasure hearing the storm of counts pick up as I cranked up <br/> the power. My experience with the 12-4 unit (whi...
by Carl Willis
Sat Jan 18, 2003 9:12 pm
Forum: Images du Jour
Topic: Archived - Carl Willis fusor setup
Replies: 0
Views: 5736

Archived - Carl Willis fusor setup

Here's a few photos of my recently functional fusor. It got its first breath of deuterium last night, accompanied by ~2 mrem / hr neutrons on the Ludlum 12-4 BF3 counter shown, but was only run for a few minutes. Top left: front view; the orange thing at left is a Tylan General capacitance manometer...