Search found 10 matches

by Hunter Long
Sat Sep 21, 2019 1:39 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Local geographic gamma counting- how is your soil?
Replies: 16
Views: 972

Re: Local geographic gamma counting- how is your soil?

Ok! Thanks for the tip. Why would that be the case though?
by Hunter Long
Thu Sep 19, 2019 7:19 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Local geographic gamma counting- how is your soil?
Replies: 16
Views: 972

Re: Local geographic gamma counting- how is your soil?

So the hot spot I found in the video had no rock outcroppings, the soil itself contains a lot of Thorium (probably similar in composition to the Amelia Co. sand you have). This paper: https://dmme.virginia.gov/commercedocs/PUB_38.pdf led me to the spot (it's labeled #2) and they said the soil contai...
by Hunter Long
Sat Sep 14, 2019 6:33 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Local geographic gamma counting- how is your soil?
Replies: 16
Views: 972

Re: Local geographic gamma counting- how is your soil?

Frank,

Safecast looks really interesting! It looks like there has already been quite a lot of geographical data collected on it. How do you all handle calibrating all of those devices?
by Hunter Long
Wed Sep 11, 2019 7:44 pm
Forum: Interesting Links
Topic: Mapping Background Gamma Ray Activity with GPS Scintillation Detector
Replies: 8
Views: 708

Re: Mapping Background Gamma Ray Activity with GPS Scintillation Detector

Thanks! I looked at Soddy's book, it's really interesting. I'm not familiar with the term Thorium cow. Is this the device he mentions where daughters of Radon gas are collected onto a negatively charged needle in a beaker?

-Hunter
by Hunter Long
Tue Sep 10, 2019 2:16 pm
Forum: Interesting Links
Topic: Mapping Background Gamma Ray Activity with GPS Scintillation Detector
Replies: 8
Views: 708

Re: Mapping Background Gamma Ray Activity with GPS Scintillation Detector

Interesting! What is the name of this park you found? I might have to check it out next time I'm in Richmond. I have a couple of ziplock bags containing some soil from the field I found. The bags make my 2" Geiger probe register around 1k-2k cpm. It looks just like normal red clay dirt, no visible r...
by Hunter Long
Mon Sep 09, 2019 5:19 pm
Forum: Interesting Links
Topic: Mapping Background Gamma Ray Activity with GPS Scintillation Detector
Replies: 8
Views: 708

Mapping Background Gamma Ray Activity with GPS Scintillation Detector

Hey everybody, Hope you don't mind some shameless self promotion, but here is a YouTube video I made detailing a GPS logging scintillation detector I built recently: https://www.youtube.com/watch?v=ReM5nC2OOUU I've been using it to map background radiation levels around Charlottesville, VA and I fou...
by Hunter Long
Fri Jan 19, 2018 8:57 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: High Voltage Supply for PMT
Replies: 9
Views: 3826

Re: High Voltage Supply for PMT

Thanks for the ideas!! I called a Coilcraft representative and found a part that looks very similar to the CTX210609-R. It can be found here: https://www.coilcraft.com/ccfl.cfm and is the "FL2015-3L_". You can purchase directly from Coilcraft and there is no minimum order. I just requested 5 free sa...
by Hunter Long
Thu Jan 18, 2018 9:29 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Neutron temperature
Replies: 5
Views: 4508

Re: Neutron temperature

Ok, thanks for the reply. So are there such a thing as "thermal" protons or electrons?

https://en.wikipedia.org/wiki/Neutron_temperature
by Hunter Long
Thu Jan 18, 2018 3:51 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Neutron temperature
Replies: 5
Views: 4508

Neutron temperature

Hi guys, So can someone explain to me why neutrons are often classified by temperature whereas protons and electrons are not (not that I've heard of at least)? Is it because the energy distribution of neutron resembles that of a noble gas whereas protons and electrons do not (because of their strong...
by Hunter Long
Thu Jan 18, 2018 3:27 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: High Voltage Supply for PMT
Replies: 9
Views: 3826

High Voltage Supply for PMT

Hi guys, I don't know of many open source designs for HV PMT power supplies other than the Theremino PmtAdapter: http://www.theremino.com/blog/gamma-spectrometry/comment-page-1?lang=en So I really want to design an open source, HV, low noise, power supply for a PMT. I would also like it to only use ...