Fusor Forums

Should be interesting... and exciting too. Good on ya, Frank.

JonR

Except for the detector’s thickness (it’s 5/8” thick) you’ve got it right, Richard.

JonR

Detector position for the 90-degree data in an earlier post was in-line with the neutron formation area (0.75” off center) not the cube's centerline. Below find close-up 0-degree/90-degree data taken with the detector on the cube's centerline at both 0-degrees and 90-degrees. data_1.jpg Each distanc...

Frank,
I sat on that graph for quite a while because something didn't seem quite right about it, but I never could put my finger on what it was.

Here is a similar chart from the attached paper. JonR

Joe, I don't know if you consider 20-inches a "much greater distance", but that's the limit of my setup.

Ratio of 0-degree to 90-degree count-rates at different distances.
At 3.5-inches = 3.0:1
At 10-inches = 2.0:1
At 20-inches = 1.7:1

Jon Rosenstiel

Wow, very interesting hypothesis Frank, and great analogy, think laser without the mirrors. I had a great time doing the experiment. And that BC-720 replica I made nearly twenty years ago finally found a purpose.

JonR

Glad to be of help.

Just now fixed the missing txt file, managed to copy its contents into a word document.

JonR

Sorry for the long delay Frank. Feedthrough puncture issues, other projects, a water-cooling mod and on and on. All data runs were done at 8 mA, 44 kV, ~23.5 mTorr. Two detectors were used, a moveable fast neutron detector (2” BC-720 replica coupled to a pmt) and a stationary 1”x 22” He3 tube in a p...

Beautiful star, Mark. If you positioned a bubble detector in line with one of the star’s rays I suspect you’d see more bubbles than when placed between the rays.

JonR

I believe I've got everything fixed... except for the txt file.

JonR