Search found 13 matches

by Chris Seyfert
Wed Feb 01, 2017 4:42 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New neutron detector available
Replies: 20
Views: 8399

Re: New neutron detector available

Sorry for the confusion, I consider "a few" to be less than five :) I edited the above post with "two" instead of "a few". Anyways, I think the latest quote for a BTI dosimeter was $160? For the price of two BTI bubble dosimeters, you could buy a Domino. The Domino costs about $300 - 350 each , depe...
by Chris Seyfert
Wed Feb 01, 2017 2:52 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New neutron detector available
Replies: 20
Views: 8399

Re: New neutron detector available

Like I said, about the cost of two bubble dosimeters. Approximately $350 each, YMMV, get yer own quote. The detectors are 4 cm^2 active area, and the "low-end" detectors are 20% efficient for thermal neutrons. That puts its thermal neutron efficiency at 0.8 cps/nv. Their data sheet shows that in a r...
by Chris Seyfert
Tue Jan 31, 2017 3:59 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New neutron detector available
Replies: 20
Views: 8399

New neutron detector available

Hello all, I have good news for all fusioneers. There's a new neutron detector on the market that should be just the ticket for most fusors. It is the "Domino" detector, manufactured by Radiation Detection Technologies, a spinoff from Kansas State U. It is a small detector (active area about 4 cm^2)...
by Chris Seyfert
Thu Jul 08, 2010 5:51 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fluorinert Alternative?
Replies: 9
Views: 4623

Re: Fluorinert Alternative?

<t>The deodorized kerosene will probably work well. If you can source it in the future, you may want to look into either Shell Diala AX, a good transformer oil, or possibly Envirotemp FR3, a biodegradeable insulating oil (more viscous, but higher water tolerance).<br/> <br/> A word to the wise: what...
by Chris Seyfert
Wed Apr 21, 2010 1:32 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Want Some Big He-3 Reuter Stokes Proportional Tubes?
Replies: 9
Views: 3679

Re: Want Some Big He-3 Reuter Stokes Proportional Tubes?

<t>I don't think it's just a DOT restriction. I was also wondering why manufacturers didn't pressurize BF3 tubes higher than 1 atm, until I stumbled across this nugget in Glenn Knoll (3rd ed):<br/> <br/> "Because the performance of BF3 as a proportional gas is poor when operated at higher pressures,...
by Chris Seyfert
Wed Jan 13, 2010 2:45 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Need pro comments before building ICP
Replies: 10
Views: 5064

Re: Need pro comments before building ICP

<t>Steve,<br/> <br/> Am I correct in that your RF antenna will be wound around a steel vacuum chamber? If so, I am afraid it will not work. The steel will shield the RF and you will not get any inductive coupling to the inside - instead, you will just heat the steel tube wall.<br/> <br/> This is why...
by Chris Seyfert
Mon Dec 28, 2009 6:31 pm
Forum: Vacuum Technology (& FAQs)
Topic: Anti-seize compound for 1/4-28 threads
Replies: 19
Views: 4796

Re: Anti-seize compound for 1/4-28 threads

<t>A less messy alternative to anti-seize on every bolt, and more affordable than silver plated bolts, is high quality grade 8 yellow-zinc-plated bolts. At my work place we use them extensively on vacuum systems, and have yet to have a problem with seizing, although we have few threaded conflats (mo...
by Chris Seyfert
Sat Dec 12, 2009 3:29 am
Forum: Vacuum Technology (& FAQs)
Topic: Diffusion Pump Troubles
Replies: 25
Views: 5563

Re: Diffusion Pump Troubles

<t>That sounds like an epic battle indeed! I'm surprised you managed to make a water-cooled diff pump work at all without the water supply.<br/> <br/> A garden hose will provide more than enough cooling. Buy yourself a nice valve, you'll need it for throttling the flow rate. I don't know what size d...
by Chris Seyfert
Thu Dec 03, 2009 6:32 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: He3 Supplier
Replies: 10
Views: 2847

Re: He3 Supplier

<r>As the previous posts have said, the going rate is $2000/liter, and that only if you're sponsored by the government:<br/> <br/> <URL url="http://www.nytimes.com/2009/11/23/us/23helium.html?_r=3&hpw"><LINK_TEXT text="http://www.nytimes.com/2009/11/23/us/23 ... l?_r=3&hpw">http://www.nytime...
by Chris Seyfert
Wed Aug 05, 2009 1:43 am
Forum: Images du Jour
Topic: Archived - Frank Sanns Levitated Pit Fusor
Replies: 20
Views: 10303

Re: Archived - Frank Sanns Levitated Pit Fusor

<t>Frank,<br/> <br/> I was recently reading a science forum and this was brought to my attention. Apparently, in 1998, Corning sold its consumer products division, and since then all "Pyrex" brand kitchenware is made of tempered soda lime glass - NOT borosilicate. Pyrex kitchenware made in France an...