Search found 109 matches

by Joe Gayo
Tue Apr 23, 2019 1:18 am
Forum: Vacuum Technology (& FAQs)
Topic: Edward Barocel pinout?
Replies: 3
Views: 7135

Re: Edward Barocel pinout?

Does anyone have this information?
by Joe Gayo
Mon Apr 22, 2019 10:37 pm
Forum: Images du Jour
Topic: More Upgrades
Replies: 14
Views: 9488

Re: More Upgrades

I added a water cooling loop to the chamber to allow longer run times. (The thickness of the cathode already allows for long run times.) The main limiter seems to be electron beam heating of the walls which vaporizes material and poisons the fusion rate. The current setup can run for hours at 5mA an...
by Joe Gayo
Thu Apr 11, 2019 7:48 pm
Forum: Images du Jour
Topic: More Upgrades
Replies: 14
Views: 9488

More Upgrades

It has been a while since my last post, but I've continued working on the device. There have been several significant upgrades: - Feedthrough and ballast resistor changed to accommodate 60kV (with the assistance of mineral oil). IMG_1233_sm.jpg IMG_1234_sm.jpg - New 1kW 60kV power supply - Pressure ...
by Joe Gayo
Mon Mar 18, 2019 4:09 am
Forum: Announcements and Site Administration Topics
Topic: Commentary on Doing Fusion
Replies: 17
Views: 9671

Re: Commentary on Doing Fusion

My suggestion is to raise the minimum n/sec (and require bubble dosimeter or electronic detection with traceable calibration) for neutron club entry.
by Joe Gayo
Mon Mar 04, 2019 3:22 am
Forum: Announcements and Site Administration Topics
Topic: Dumping the trash
Replies: 9
Views: 7079

Re: Dumping the trash

The spambot question is fine ... It seems like a minimum bar for those attempting to work with high voltage, vacuum, etc.
by Joe Gayo
Wed Feb 27, 2019 6:29 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Collection of information about russian SNM tubes
Replies: 13
Views: 11088

Re: Collection of information about russian SNM tubes

The SNR improved dramatically, so gammas can be discriminated
by Joe Gayo
Wed Feb 27, 2019 4:43 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Collection of information about russian SNM tubes
Replies: 13
Views: 11088

Re: Collection of information about russian SNM tubes

Can you try running the CHM-11 just below the corona starting voltage (ie 670V)?
by Joe Gayo
Sun Feb 17, 2019 8:18 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: SNM-11/СНМ-11 Tube - Again ...
Replies: 12
Views: 8224

SNM-11/СНМ-11 Tube - Again ...

The Russian tubes have been discussed numerous times, but I recently made some observations that are worth sharing. I've been frustrated by the signal to noise ratio of the SNM-11 tube at the recommended bias voltage of 1600V. The bias resistor is 50Meg and the signal is ac coupled and terminated as...
by Joe Gayo
Sun Feb 17, 2019 4:58 am
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 29
Views: 9811

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

For the first few seconds, the count rate is 400/sec when the voltage is 50kV. As the pressure rises and the voltage falls, the count rate finishes at 200/sec. Roughly 100/sec correlates to 500k n/sec, so the rate starts at 2M n/sec and falls to 1M n/sec. If the pressure was dynamically controlled t...
by Joe Gayo
Sun Feb 17, 2019 4:33 am
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 29
Views: 9811

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

Qty. 2 of 5856K16 (from McMaster Carr) on one opposing pair of sides. The fields are aligned in the same direction. I used FEMM (http://www.femm.info/wiki/HomePage) to calculate the field strength.