Search found 10420 matches

by Richard Hull
Sat Apr 17, 2021 5:25 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: PMT/Scint. divider topology differences
Replies: 6
Views: 169

Re: PMT/Scint. divider topology differences

I have always made up my PMT devices as separate. I have several Ludlum scint. probes that are single and they attach to walk-around survey meters. The single connection is fine for that purpose. For Gamma spec work, my 3 shiny chromed Bicrons and others like Harshaw always separate the HV from the ...
by Richard Hull
Thu Apr 15, 2021 4:34 am
Forum: Images du Jour
Topic: UPS Reactor - Plasma achieved!
Replies: 6
Views: 295

Re: UPS Reactor - Plasma achieved!

Dennis is correct. There are strict rules created last year for the plasma club. On that fatal day, which had over 100 claimants collected over 20 years were wiped from existence to have 0 names in the club until, over the last 5-6 months, we have only added three new members. Check out the rules an...
by Richard Hull
Wed Apr 14, 2021 3:52 am
Forum: Images du Jour
Topic: UPS Reactor - Plasma achieved!
Replies: 6
Views: 295

Re: UPS Reactor - Plasma achieved!

Congratulations on getting that glow in you project fusor. All the best in your group's continuing efforts in achieving fusion.

Richard Hull
by Richard Hull
Mon Apr 12, 2021 4:10 am
Forum: Vacuum Technology (& FAQs)
Topic: Bell and whistles diffusion pump based vacuum system.
Replies: 37
Views: 5156

Re: Bell and whistles diffusion pump based vacuum system.

My Pfeiffer passes through a resonant point at every start up and shut down lasts about a second or two. I figure that is normal. At least it pumps well so I'm not concerned. Everything has a resonance point.

Richard Hull
by Richard Hull
Sun Apr 11, 2021 6:26 pm
Forum: Vacuum Technology (& FAQs)
Topic: Bell and whistles diffusion pump based vacuum system.
Replies: 37
Views: 5156

Re: Bell and whistles diffusion pump based vacuum system.

I have tried slowing down the turbo by venting and even with gentle slowing was also horrified and worried for the pump. I will never attempt it again. At 75 years of age I figure I have the time to be off doing something else useful and constructive as the device slows naturally to a stop. Richard ...
by Richard Hull
Sun Apr 11, 2021 5:32 pm
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - About electronic noise in neutron detection
Replies: 0
Views: 58

FAQ - About electronic noise in neutron detection

Electronic based neutron detection can be done using many available detectors. The fusor can be an electronically powerful and noisy RFI and EMI device. Almost all neutron detectors are secondary or "stepped" detection devices that produce very weak signals. Likewise, many are subject to detection o...
by Richard Hull
Sun Apr 11, 2021 4:40 pm
Forum: Announcements and Site Administration Topics
Topic: Neutron Club / Recycled Fusor
Replies: 10
Views: 608

Re: Neutron Club / Recycled Fusor

Codicil #4 has been added to the posted rules for becoming a neutron club member.

Richard Hull
by Richard Hull
Sun Apr 11, 2021 4:22 pm
Forum: Announcements and Site Administration Topics
Topic: Neutron Club / Recycled Fusor
Replies: 10
Views: 608

Re: Neutron Club / Recycled Fusor

This good info and ought to be in the detection forum. I will post my thoughts now there. I have created a FAQ on noise in neutron detection at https://fusor.net/board/viewtopic.php?f=31&t=13961&p=91005#p91005 No! a neutron generator tube doesn't cut it for the neutron club. Here, we are about the j...
by Richard Hull
Sat Apr 10, 2021 11:35 pm
Forum: Announcements and Site Administration Topics
Topic: Neutron Club / Recycled Fusor
Replies: 10
Views: 608

Re: Neutron Club / Recycled Fusor

I was stunned that "Joe" won it. Thanks Joe for telling it wasn't you. I had visions of our Joe Gayo driving to Miami from CA picking the system up and driving back! The codicil related to must "pick up, will not ship, will not break up system" put a real strain on anyone who might be beyond a very ...
by Richard Hull
Sat Apr 10, 2021 5:37 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Long Lasting Bubble Detector
Replies: 6
Views: 363

Re: Long Lasting Bubble Detector

Thanks for the update on CA education direction. I know a teacher in our local school system. The kids are back in class and being taught now, finally, but it is exactly as you say. No hands on and the death of any cursive writing, no history in many cases, STEM stuff is dumbed down and I was stunne...