Search found 66 matches

by Robert Dwyer
Mon Dec 02, 2019 6:40 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Columbus-1 Linear Pinch Fusion Success
Replies: 9
Views: 499

Re: Columbus-1 Linear Pinch Fusion Success

Great work Mark! First neutrons is always exciting. It's cool to see a pulsed power device like this producing neutrons at an amateur level. Imagine what the pinch fusion physicists of the 50's and 60's would think if they saw this now! From my experience using the dosimeters in a pulsed neutron/gam...
by Robert Dwyer
Mon Dec 02, 2019 6:16 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Spellman Power Supplies
Replies: 7
Views: 491

Re: Spellman Power Supplies

Hello Emrys, -40KV @ 5ma should work well enough considering you have sensitive enough counters, or long enough runtimes for Bubble Dosimeters or activation foils to pick up a reasonable signal. I ran my fusor with a -50KV 5ma Hipotronics supply. In its early life I tried to keep my voltages lower t...
by Robert Dwyer
Sun Nov 17, 2019 4:21 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Columbus-I Pinch Tube Build
Replies: 49
Views: 20815

Re: Columbus-I Pinch Tube Build

Mark, Great effort, it is really cool seeing this project come along. I can say from experience working with high-yield pinches impurities have a massive effect on performance, even when dealing with MegaJoule machines, one thumbprint on an electrode, one manufacturer sending a wrong type of glass o...
by Robert Dwyer
Tue Aug 06, 2019 8:10 pm
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - Neutron Transport Simulation, Detector Calibration, and Shielding
Replies: 10
Views: 3646

Re: FAQ - Neutron Transport Simulation, Detector Calibration, and Shielding

Liam, Great work! It is good to see someone using Monte-Carlo simulations in the community. This a great example of using a Monte-Carlo for detector work. One can easily poor hours into such software trying to find optimum moderator configurations, mapping the flux of such systems, etc... I have nev...
by Robert Dwyer
Wed Jul 31, 2019 9:13 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 21567

Re: Joe Gayo's lab tour

Personally I doubt this Tritium, but I think it is rather some artifact of the rga. In other systems I have used an rga on (not fusors), I have seen the peak at 6 before when working with deuterium. Remember the rga is ionizing, so there is the possibility of D3 ions being created as well as some ot...
by Robert Dwyer
Tue Jul 02, 2019 1:18 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 21567

Re: Joe Gayo's lab tour

Does this reading corellate with the high count rate from the BF3 tube? If so then you may be seeing real counts. I think setting up both a bubble dosimeter along with another tube at a greater distance at the same parameters of voltage, current, and pressure and see if you get the same yield. If th...
by Robert Dwyer
Tue Jul 02, 2019 12:55 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 21567

Re: Joe Gayo's lab tour

I think there should be decent dead time in your system that can cause pulse-pileup, but I am unsure why that would make you have multiplying count rates. I think there are three places that will give you dead time, and measurements of these with an o-scope could help diagnose this issue: 1. Tube de...
by Robert Dwyer
Tue Jun 25, 2019 5:10 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Some Beefy Power Supplies
Replies: 2
Views: 3532

Re: Some Beefy Power Supplies

Dennis, I believe the unit supplkies 25kHz which should be enough to drive a multiplier. Of course, the multiplier would have to consist of many stages to step up to 60kv. When I get around to taking o-scope measurements of the driver, ill begin looking into the values of the diodes and capacitors t...
by Robert Dwyer
Tue Jun 25, 2019 4:07 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: T-T Fusion in a radioluminescence tube.
Replies: 9
Views: 4084

Re: T-T Fusion in a radioluminescence tube.

The cross sections for Tritium-Tritium fusion are incredibly low, and I doubt it is in reach of an amateure, researcher, and I am highly suspect of the physics the video poster is claiming to be occurring. The proper use of radioactive materials, and including tritium exit signs and Americium from a...
by Robert Dwyer
Wed Jun 19, 2019 1:36 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Some Beefy Power Supplies
Replies: 2
Views: 3532

Some Beefy Power Supplies

Hello All, I haven't been posting nearly as much as i want to, and that is, of course, because I have not been doing as much as I want to. Working two jobs and college turns to take up a lot of time. I am however, slowly pinging away at the upgrade to my fusor. In fact, this will be an entirely new ...