Search found 428 matches

by Mark Rowley
Sun Jun 28, 2020 11:29 pm
Forum: Images du Jour
Topic: Quaid Hawkins - Plasma and Progress
Replies: 1
Views: 220

Re: Quaid Hawkins - Plasma and Progress

Excellent work!! "I occasionally hook up the 30kV precipitator power supply but haven't been able to get more than 4kv out of it when running it with the fusor, but with test loads it's fine." Sounds like your trying to run it with too high of pressure. Once you obtain 40mTorr and below you should h...
by Mark Rowley
Tue Jun 16, 2020 3:53 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Ludlum 2200 scaler + snm17 and 14
Replies: 5
Views: 340

Re: Ludlum 2200 scaler + snm17 and 14

Sarmad, Many of us responded to you in this thread (https://fusor.net/board/viewtopic.php?f=13&t=13216) regarding neutron detection and you never answered back. The answers/suggestions/responses to your questions are still there. As stated in other threads, the CHM17 (snm) is a Soviet 3He tube. LND ...
by Mark Rowley
Thu Jun 11, 2020 4:41 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New Portable Neutron Detector Test (CT007-T)
Replies: 9
Views: 414

Re: New Portable Neutron Detector Test (CT007-T)

I asked Kai this afternoon and yes, $1k is in fact the projected cost. If there are any changes I'll update.

Mark Rowley
by Mark Rowley
Wed Jun 10, 2020 8:33 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New Portable Neutron Detector Test (CT007-T)
Replies: 9
Views: 414

Re: New Portable Neutron Detector Test (CT007-T)

No different than using the Ludlum 2221. 3-4cpm (average background of 1cpm subtracted).

Mark Rowley
by Mark Rowley
Wed Jun 10, 2020 5:40 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New Portable Neutron Detector Test (CT007-T)
Replies: 9
Views: 414

Re: New Portable Neutron Detector Test (CT007-T)

Thanks Alan! Not sure, it came within a bulk load of stuff I picked up from someone who completely got out of the hobby. Compared to the source in Carl’s Mn56 video, probably very little. At its absolute best orientation in the paraffin moderator it’ll register ~14cpm with the CT007-T. Using the CHM...
by Mark Rowley
Wed Jun 10, 2020 4:33 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: New Portable Neutron Detector Test (CT007-T)
Replies: 9
Views: 414

New Portable Neutron Detector Test (CT007-T)

-Portable Thermal Neutron Detector- I was afforded the opportunity to test the yet-to-be-released CT007-T Li6 based neutron detector. It’s expected for these to begin production in early 2021 as the renamed CT008-T. The "8" will incorporate a newer microprocessor. 44090F2B-26FC-426B-9364-406A31F6D18...
by Mark Rowley
Tue Jun 09, 2020 6:40 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Columbus-I Pinch Tube Build
Replies: 56
Views: 33712

Re: Columbus-I Pinch Tube Build

Just a quick update... The tube is being completely reconfigured to a 4” diameter system with tungsten electrodes and an RF pre-ionizer. Spark gap triggering is being addressed and refined as well. I’ve already taken delivery on the 4” diameter fused quartz tubing and aluminum round stock for the tu...
by Mark Rowley
Sun May 24, 2020 3:38 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Easy $150 Neutron Detection System
Replies: 23
Views: 3096

Re: Easy $150 Neutron Detection System

Jim Glad to hear it’s working good for you. Using the Ludlum 2221, my CHM11 averages about 1cpm. Two 10 separate 10 minute counts yielded 9 and 10 events each. Rich, I forgot to update the AmBe remark in the earlier post. Alan and I were discussing static neutron sources a couple months ago and I re...
by Mark Rowley
Sun May 10, 2020 5:26 pm
Forum: Images du Jour
Topic: Neutron Club Application - Nathan Marshall
Replies: 7
Views: 665

Re: Neutron Club Application - Nathan Marshall

Congrats Nathan! Job well done and welcome to the club. Your report and presentation was nothing short of outstanding.

Looking forward to your future Fusor experiments.

Mark Rowley
by Mark Rowley
Mon May 04, 2020 12:45 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Easy $150 Neutron Detection System
Replies: 23
Views: 3096

Re: Easy $150 Neutron Detection System

Hello Sarmad, I’m doubtful that the regular hardware store variety smoke detector sources (even a bunch) will provide a strong enough neutron source to be readily detected above background. Couple questions... 1) How did you wire the detector to the Ludlum? The connection points between the cable an...