Search found 44 matches

by hjerald1
Mon Jan 28, 2013 4:11 pm
Forum: Fusion --- Past, Present, and Future
Topic: The Neutristor
Replies: 8
Views: 5292

Re: The Neutristor

<r>Novel Surface-Mounted Neutron Generator<br/> Elizondo-Decanini, J.M. <br/> Schmale, D. ; Cich, M. ; Martinez, M. ; Youngman, K. ; Senkow, M. ; Kiff, S. ; Steele, J. ; Goeke, R. ; Wroblewski, B. ; Desko, J. ; Dragt, A.J. <br/> Sandia Nat. Labs., Albuquerque, NM, USA <br/> <br/> IEEE Transaction on...
by hjerald1
Mon May 14, 2012 4:42 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Help With A Cloud Chamber?
Replies: 10
Views: 6499

Re: Help With A Cloud Chamber?

<r>Some pictures of your setup might make it a little easier to help you..<br/> <br/> However, most folks use ~99% isopropanol, which seems to supersaturate the chamber more effectively than does the alcohol with more water content.<br/> <br/> Also the following link might give you some ideas of whe...
by hjerald1
Wed May 09, 2012 11:02 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Fusion in an exploding, (imploding) wire?
Replies: 23
Views: 9899

Re: Fusion in an exploding, (imploding) wire?

<t>A Google search reveals publications concerning neutron production via exploding wires of metal deuterides.<br/> <br/> I have wondered for some time about the use of electromagnetic forming or “magneforming” via high power pulsed magnetic fields to promote D-D fusion in metal deuteride targets. A...
by hjerald1
Wed May 09, 2012 3:01 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Fusion in an exploding, (imploding) wire?
Replies: 23
Views: 9899

Re: Fusion in an exploding, (imploding) wire?

<t>Richard,<br/> This concept is related to the approach of using explosively compressing UD3 in order to provide "trigger" neutrons for fission weapons. It has been postulated (by those not privy to classified information), that this technique is used by (at least) the US, Pakistan, and China in cu...
by hjerald1
Sat Jul 09, 2011 2:21 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Canberra Inspector MCA info?
Replies: 11
Views: 6749

Re: Canberra Inspector MCA info?

<t>Cables (used on old SUN video monitors) with a male 13W3 connector that will attach to the preamp output of the Inspector 1200 series MCAs are readily available from EBay for ~$10-$30. One can attach connector(s) (e.g. 9 pin D and BNC) needed for your preamp/detector to the other end of these cab...
by hjerald1
Wed Apr 13, 2011 7:35 pm
Forum: Vacuum Technology (& FAQs)
Topic: Richards valve???
Replies: 2
Views: 2200

Re: Richards valve???

<t>Hi Bob,<br/> Thanks for the info. It helped greatly and I learned some stuff!<br/> Unfortunately the operator I need is apparently a specialty unit built specifically for my detector. I finally had to order it from the original manufacturer with the associated scalping price .<br/> <br/> Now on t...
by hjerald1
Wed Mar 30, 2011 10:37 pm
Forum: Vacuum Technology (& FAQs)
Topic: Richards valve???
Replies: 2
Views: 2200

Richards valve???

<t>I need an adapter for the "Richards valve" in my HPGe detector in order to renew the vacuum. Attached is a picture. The brass thingy is apparently a Richards valve. Did the Google thing, then tried ebay, and searched the Forums and found nothing that was of particuar help.<br/> <br/> First.... an...
by hjerald1
Tue Mar 29, 2011 10:23 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Refurbishing an Ortec HPGe detector
Replies: 16
Views: 8109

Re: Refurbishing an Ortec HPGe detector

I understand there should be some molecular sieves somewhere to help scavenge
undesireable volatile stuff (e.g. H2O) in the vacuum, especially when the detector is warmed and then cooled again. Image 3 is a packet of such??? Not what I expected it to look like though.
Jerry
by hjerald1
Mon Mar 28, 2011 2:09 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: EDITED, EDITED Help MCA HPGe HV Shutdown
Replies: 5
Views: 2646

Re: EDITED, EDITED Help MCA HPGe HV Shutdown

<t>Hi Jeroen,<br/> Thanks much for the explanation. I am at least starting to get the picture.<br/> <br/> To get down to what I need in practice, I have a BNC input on my MCA (Canberra DSA-1000) that is HV INH (inhibit), which in fact enables or inhibits the HV bias depending on the following input ...
by hjerald1
Fri Mar 25, 2011 8:34 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: EDITED, EDITED Help MCA HPGe HV Shutdown
Replies: 5
Views: 2646

EDITED, EDITED Help MCA HPGe HV Shutdown

<t>Hi all,<br/> <br/> I am hoping that someone here on the Forum can provide this chemist with some electronics assistance .<br/> I am working on setting up my newly acquired HPGe detector with my MCA system <br/> The only thing I am missing is a HV bias supply shutdown in the event of a detector wa...