Search found 41 matches

by JoeBallantyne
Wed Jan 06, 2021 4:53 am
Forum: Advanced Technical Discussion Area
Topic: RGA to Analyze Ion Beam Composition
Replies: 8
Views: 2157

Re: RGA to Analyze Ion Beam Composition

Rather than destroy a functioning RGA, why not just connect the RGA to the source side of the gas going into the ion beam generator. If you build a small chamber separate from the main chamber into which the feed gas goes, and then you put an RGA connected to that, and the ion source separates the s...
by JoeBallantyne
Thu Dec 31, 2020 9:29 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: 125kV Fusor
Replies: 13
Views: 2382

Re: 125kV Fusor

Those cpm counts are pretty high. Have you considered moving your neutron detection tube so it is 2x, 4x or 10x further away from your source, so that you reduce your cpm by a factor of 4, 16 or 100? At some point you may compromise the accuracy of your numbers because the count rate is so high. (A ...
by JoeBallantyne
Thu Dec 31, 2020 9:24 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: 125kV Fusor
Replies: 13
Views: 2382

Re: 125kV Fusor

So that would be 5.3E7 n/sec total based on multipliers you used in the other thread.

Correct?

Joe.
by JoeBallantyne
Thu Dec 24, 2020 9:56 pm
Forum: Fusion --- Past, Present, and Future
Topic: Farnsworth Questions
Replies: 33
Views: 11472

Re: Farnsworth Questions

Yes, many of them. The Marriott Library at the University of Utah has a large collection of Philo Farnsworth papers. The vast majority of which are technical. Included are lab notebooks from Hirsch, and Meeks, as well as Farnsworth. I have about 30+GB of pictures of said material. I took said photos...
by JoeBallantyne
Tue Dec 22, 2020 2:58 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Activation of Cobalt-59 Yields 5.3-year Co-60
Replies: 4
Views: 1144

Re: Neutron Activation of Cobalt-59 Yields 5.3-year Co-60

Very cool Jon. You and Joe Gayo are probably the only two people on this site that can currently generate enough neutrons to do this activation in a reasonable amount of time.

Your detector setup for generating spectra is without doubt vastly superior to what anyone else here has.

Joe.
by JoeBallantyne
Mon Dec 21, 2020 7:11 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Progress Update
Replies: 22
Views: 2252

Re: Progress Update

1.2E+7 n/sec (your last run) is doing VERY well indeed.

What pressure are you running at? If there is no plasma glow at all, I expect you are running at much lower pressures than pretty much everyone else here.

Joe.
by JoeBallantyne
Mon Dec 21, 2020 5:50 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Progress Update
Replies: 22
Views: 2252

Re: Progress Update

For your two calibration runs, the ratios between the cpm and the total neutrons emitted per second are different. Based on the first run, the expected total n/sec for the second run would be 3.9E+6. (95kcpm / 56kcpm) * 2.3E+6 n/sec = 3.9E+6 n/sec Or is the relationship between cpm and n/sec not lin...
by JoeBallantyne
Sun Dec 20, 2020 6:38 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Progress Update
Replies: 22
Views: 2252

Re: Progress Update

So what is your estimated total neutron ouput per second for this run?

That very large neutron tube looks like one of a pair of tubes Jon Rosenstiel was using to detect neutrons generated from high energy cosmic rays a few years back.

Joe.
by JoeBallantyne
Sat Dec 19, 2020 6:31 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Deuterated lithium
Replies: 5
Views: 987

Re: Deuterated lithium

Lithium 6 deuteride is thermonuclear bomb fuel. Why do you keep bringing up topics that have nothing to do with fusors? Keep it up, and you will likely just get banned.

Joe.
by JoeBallantyne
Mon Nov 30, 2020 2:32 am
Forum: Files
Topic: Neutron Detection Methods and Instruments
Replies: 3
Views: 4093

Neutron Detection Methods and Instruments

Found this article online and thought it was relevant.
NeutronDetectionMethodsAndInstruments.pdf
(2.29 MiB) Downloaded 158 times