Search found 1192 matches

by Jon Rosenstiel
Sat Oct 12, 2019 5:28 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cube fusor build
Replies: 12
Views: 991

Re: Cube fusor build

Richard,

The reaction may be isotropic in nature, but the neutrons coming out of the cube are definitely not. Both Joe and I have confirmed that the cube's neutron "output" or "flux" is about four times stronger in line with the plasma beam than at right angles to the beam.

Jon Rosenstiel
by Jon Rosenstiel
Fri Oct 11, 2019 10:36 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cube fusor build
Replies: 12
Views: 991

Re: Cube fusor build

Jim, I think I may have figured this out, please let me know what you think. Off-axis tests using my BC-720 replica fast neutron detector showed that the faint circles seen on the cube’s endplates (image below) roughly define the outer limits of the cube’s neutron emission cone. Plugging the circle’...
by Jon Rosenstiel
Tue Oct 08, 2019 10:43 pm
Forum: Images du Jour
Topic: HEAS 2019 photos of the event
Replies: 11
Views: 806

Re: HEAS 2019 photos of the event

Thanks for the pix David. Looks like I missed a good event.

Jon Rosenstiel
by Jon Rosenstiel
Fri Oct 04, 2019 10:12 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cube fusor build
Replies: 12
Views: 991

Re: Cube fusor build

Jim, I think the neutron numbers Joe Gayo has put forth are the real deal. https://www.fusor.net/board/viewtopic.php?f=6&t=12826 Joe and I have gotten together here in my lab on a couple of occasions and I feel he is on the up and up. (And as I recall, Joe does have two other neutron detectors that ...
by Jon Rosenstiel
Thu Oct 03, 2019 11:19 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cube fusor build
Replies: 12
Views: 991

Re: Cube fusor build

Cube fusor update… NEUTRONS! First light occurred on the afternoon of August 15th. It was a short 3 to 4-minute run to make sure everything worked as it should. Thankfully there was no magic smoke but there were lots of x-rays and a few chirps from the Ludlum 12-4 rem-ball neutron detector. Awesome!...
by Jon Rosenstiel
Wed Sep 25, 2019 6:33 pm
Forum: Images du Jour
Topic: Missing photos
Replies: 16
Views: 1087

Re: Missing photos

I do remember changing my password a few years back, but I don't recall why. I just ran across something that may (or may not) be related to all of this. A recent forum search for "hornyak button" turned up the following thread. https://www.fusor.net/board/viewtopic.php?f=13&t=5131&p=35070&hilit=hor...
by Jon Rosenstiel
Wed Sep 18, 2019 5:39 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Local geographic gamma counting- how is your soil?
Replies: 16
Views: 952

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

Over the years I’ve also accumulated some other interesting soil and sand samples. I don’t recall who sent me the Amelia Co. VA river sand, but the Tokyo gutter dirt and the Guarapari (Brazil) beach sand was sent to me by youtuber bionerd23. Soil comparisons, with sand.pdf Tokyo gutter dirt.jpg Jim,...
by Jon Rosenstiel
Tue Sep 17, 2019 10:27 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Local geographic gamma counting- how is your soil?
Replies: 16
Views: 952

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

Gamma radiation Levels in Selected Soil Samples Soil comparisons.pdf With the help of family scattered around the country I’ve been slowly bringing this together over the past couple of years. Instructions to my prospective soil samplers were to remove the top 1.5 to 2-inches of soil before filling ...
by Jon Rosenstiel
Fri Sep 13, 2019 5:28 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cube fusor build
Replies: 12
Views: 991

Re: Cube fusor build

Hi Rex,

My original posting went up around the 15th or 16th of August.

Jon
by Jon Rosenstiel
Thu Sep 12, 2019 5:52 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cube fusor build
Replies: 12
Views: 991

Cube fusor build

A lab get-together with Joe Gayo and 13” length of 4” x 4” 6061-t6 aluminum courtesy Bruce Meagher was the impetus I needed to embark on this cube fusor build. Start to finish took a little over one month. The following images document the build. 4 x 4 x 13 6061.jpg 4-inch square x 13” chunk of 6061...