Search found 124 matches

by AllenWallace
Sat Feb 22, 2003 5:50 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: background neutron counting and moderator
Replies: 3
Views: 1966

Re: background neutron counting and moderator

<t>Actually, the detector is brand new 22 inch long Helium-3 tube with an <br/> integrated electronics package. I rather suspect that the counting <br/> efficiency is *much* better than a BF3 detector. Also, my elevation <br/> might dramatically increase the background rate... I’m not sure. In any <...
by AllenWallace
Fri Feb 21, 2003 8:32 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: background neutron counting and moderator
Replies: 3
Views: 1966

background neutron counting and moderator

<t>For those of you who have neutron detectors, what is your typicial background rate? also, if you remove the rmoderator, does the count change much? Your elevation above sea level?<br/> <br/> Our typical rate is about 30 cps and we are at 4700 feet in elevation. adding a moderator only slightly de...
by AllenWallace
Mon Feb 10, 2003 1:07 am
Forum: Vacuum Technology (& FAQs)
Topic: We fried our turbo pump!
Replies: 9
Views: 10066

We fried our turbo pump!

<t>While testing our fusor,our turbo pump failed. I though it might be <br/> instructional to relate our sad story and what we think caused the <br/> failure.<br/> <br/> Our power supply is based on a 10 KV neon sign transformer (NST). <br/> We ignore half the transformer, and only use it as a 5 KV ...
by AllenWallace
Thu Feb 06, 2003 6:33 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Pulse power supply - how quickly does fusion happen?
Replies: 4
Views: 2353

Pulse power supply - how quickly does fusion happen?

<t>I am considering a low duty cycle pulsed power supply. It would deliver 17 KV pulses at 18 amps! that's 300 KW! The problem is that the pulse width is only 1 us. Does anyone have an idea how long it takes fusion to happen? What might be the minimum pulse width? I read that Gas Discharge tubes tri...
by AllenWallace
Wed Feb 05, 2003 4:28 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: flyback transformer and microwave diodes
Replies: 5
Views: 3135

flyback transformer and microwave diodes

<t>I have salvaged an industrial flyback transformer which was used to power an xenon industrial lamp. It's much bigger than traditional flyback transformers. I want to see if I might power my fusor with it. I wired a transistor driver, but when I observe the rectified voltage on my 'scope, it appea...
by AllenWallace
Mon Feb 03, 2003 5:40 am
Forum: Images du Jour
Topic: Archived - Craig & Allen Poiser and buggle jet
Replies: 0
Views: 3464

Archived - Craig & Allen Poiser and buggle jet

We were running 70 millitorr and 5 Kv from a NST.
The inner grid is constructed of large copper wire, no outer grid was used in this picture, the 4 in copper pipe chamber wall serves as the outer grid for now.
by AllenWallace
Mon Feb 03, 2003 5:34 am
Forum: Images du Jour
Topic: Archived - Craig & Allen demo Fusor setup
Replies: 0
Views: 3853

Archived - Craig & Allen demo Fusor setup

This is our setup. A Welch 1376 (monster) with coper plumbing.
The Chamber is a section of 4 in coper pipe.
Power supply is a NST (which we hate), and also we have a small turbo pump that will be connected soon.
by AllenWallace
Mon Jan 06, 2003 1:15 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: All-In-One Detector Board
Replies: 26
Views: 6061

Re: All-In-One Detector Board

I would like one. I really don't need silk screen, etc.
Allen Wallace
by AllenWallace
Sun Dec 15, 2002 12:32 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: neutron detector schematics
Replies: 0
Views: 1198

neutron detector schematics

I found this web site: http://www.fwt.com/hpi/support_hpi.htm

It's full of operation manuals (with schematics) of multiple types of radiation detectors.
by AllenWallace
Tue Oct 29, 2002 1:44 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: heavy water or deuterium
Replies: 2
Views: 1958

Re: heavy water or deuterium

I purchased my D2O at the local university. $25 for 20g.