Search found 89 matches

by Jim Stead
Wed May 04, 2016 2:17 am
Forum: New User Chat Area
Topic: He3 Neutron Detector question
Replies: 14
Views: 2642

Re: He3 Neutron Detector question

NIM is short for Nuclear Instrumentation Module. It's a setup that involves a chassis containing a power supply and which accepts various plug in modules. The modules can be amplifiers, ratemeters, counters, timers, logic units, and many others including combination devices. For a visual, go to ebay...
by Jim Stead
Tue May 03, 2016 4:18 am
Forum: New User Chat Area
Topic: He3 Neutron Detector question
Replies: 14
Views: 2642

Re: He3 Neutron Detector question

Another thread was started about this recently. viewtopic.php?f=13&t=10710
Maybe more will respond to this thread. I thought I had seen a few months ago where others had bought this detector tube and were happy with it.
by Jim Stead
Thu Apr 21, 2016 1:36 am
Forum: New User Chat Area
Topic: Are these the type of bellows valves that can be used?
Replies: 12
Views: 1991

Re: Are these the type of bellows valves that can be used?

A cold trap and a foreline trap are different animals. A cold trap is designed to be attached between the chamber and your turbo or diff pump. It uses very low temperatures to draw water and reduce chamber vacuum. It's not needed in a fusor setup. A foreline trap is designed primarily to prevent oil...
by Jim Stead
Wed Apr 20, 2016 11:42 pm
Forum: New User Chat Area
Topic: Are these the type of bellows valves that can be used?
Replies: 12
Views: 1991

Re: Are these the type of bellows valves that can be used?

CF flanges are standardized. They will mate from one manufacturer to another. You can see the details of the flanges here - http://www.mksinst.com/product/88flangdim.aspx In that chart you can see that a 1.33 CF uses a 3/4" OD tube. A 2.75" CF has a 1.5" OD tube. After consideration for wall thickne...
by Jim Stead
Thu Apr 14, 2016 1:22 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: He3 Detector tube - Anyone see any red-flags on this listing
Replies: 1
Views: 994

Re: He3 Detector tube - Anyone see any red-flags on this lis

I bought one of these from this seller last year, and I think some others on the forum have as well. I'm not making Neutrons to be able to test it properly, but I have used it against Cesium and Uranium sources with a preamp/sca/ratecounter NIM setup. The source/distance result rates were repeatable...
by Jim Stead
Wed Mar 23, 2016 10:35 pm
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ: Geiger, Ion, Proportional counters - restoration and restoring - Dekatrons
Replies: 2
Views: 3081

Re: FAQ: Geiger, Ion, Proportional counters - restoration an

The "BEST" link recommended above is no longer valid. This link appears to go to the same information: http://educypedia.karadimov.info/electr ... pecial.htm
by Jim Stead
Wed Mar 23, 2016 6:41 pm
Forum: New User Chat Area
Topic: FAQ Issues
Replies: 24
Views: 6505

Re: FAQ Issues - Fix Progress List

19 FAQ - Activation Materials - Rhodium http://www.fusor.net/board/viewtopic.php?f=31&t=5903 "[The extension bmp has been deactivated and can no longer be displayed.]" <---unless somebody can come up with a .jpg to replace the .bmp, there's probably nothing we and do about that one. 20 FAQ - Activa...
by Jim Stead
Wed Mar 23, 2016 2:14 am
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - Choosing a Gamma Spec Scintillator detector
Replies: 8
Views: 5633

Re: FAQ - Choosing a Gamma Spec Scintillator detector

Nice work. People getting into the game might benefit from reading: R.L. Heath “Scintillation Spectroscopy Gamma Ray Spectrum Catalog” at http://www.inl.gov/gammaray/catalogs/pdf/naicat.pdf The intro is quite useful and explains a lot of the physics and geometry efects. I also found “Radiation Deca...
by Jim Stead
Wed Mar 23, 2016 2:08 am
Forum: New User Chat Area
Topic: FAQ Issues
Replies: 24
Views: 6505

Re: FAQ Issues - Fix Progress List

Jim, you're a real trouper and I appreciate the effort. I did not see your message here until I'd gotten about halfway through Thomas Price's list and realized that most of the links are external. I just posted a reply on the subject off internal -v- external links. Long story short: I'll fix inter...
by Jim Stead
Tue Mar 22, 2016 9:51 pm
Forum: New User Chat Area
Topic: FAQ Issues
Replies: 24
Views: 6505

Re: FAQ Issues - Fix Progress List

I thought I'd offer a hand to give back to the site that has been so helpful to me... This is what I have so far. Please see the replacement links below in blue. They should be reviewed to make sure they are appropriate replacements. In some cases, it's not exactly clear from the URL alone what the ...