Search found 126 matches

by Joe Gayo
Sun Jan 20, 2019 10:52 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Institutional Quackery
Replies: 12
Views: 10593

Re: Institutional Quackery

Dan, Under different circumstances I would suggest you read the paper again, but I don't want to waste your time. The author very clearly claims that he made neutron measurements with a LND model 2801 detector (Section IV C) and, in multiple places, that the experimental results correlate with his t...
by Joe Gayo
Sun Jan 20, 2019 7:42 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Institutional Quackery
Replies: 12
Views: 10593

Institutional Quackery

Author claims to have produced 49.8 Watts of fusion power and breed appreciable levels of tritium ...

https://ieeexplore.ieee.org/document/5234046

It would be funny, except it's a published paper in a journal with actual science.
by Joe Gayo
Sun Jan 20, 2019 3:14 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 50kV Supply
Replies: 40
Views: 21420

Re: 50kV Supply

The multiplier is 10 full bridge stages with 2100pF caps.

Use the excel sheet on this page to calculate regulation and drop: http://www.voltagemultipliers.com/html/multdesign.html

(But in reality I've done the work already, 75kHz drive frequency gives the least voltage drop and maximum power)
by Joe Gayo
Sat Jan 19, 2019 9:41 pm
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 29
Views: 10527

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

The following is for those who are looking for the lowest financial bar for a neutron producing fusor: If you have reasonable strong electronics knowledge, then a sub $1000 fusor is possible maybe even sub $500. ** Use a high quality two-stage rotary vacuum pump (Edwards, Pfiffer, Precision Vacuum, ...
by Joe Gayo
Sat Jan 19, 2019 4:06 pm
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 29
Views: 10527

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

Will do with the bubble detector!

I assume when you say micromaze you are referring to a sorption pump?
by Joe Gayo
Sat Jan 19, 2019 4:02 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 50kV Supply
Replies: 40
Views: 21420

Re: 50kV Supply

All true. I tested the multiplier at various resistive loads and driver frequencies and at 45% duty (90% interleaved which gives sufficient cross conduction dead-time) I found that ~75kHz gave the best output performance. Using the internal fan of the Glassman stack, 700W is no big deal. Especially ...
by Joe Gayo
Sat Jan 19, 2019 3:55 am
Forum: Images du Jour
Topic: Joe Gayo's Fusor - Neutron Detection Upgrade
Replies: 29
Views: 10527

Re: Joe Gayo's Fusor - Neutron Detection Upgrade

Just to be clear: my fusor only uses a dual stage rotary vane pump (Pfeiffer Duo 2.5) with a base pressure of 3mTorr.
by Joe Gayo
Fri Jan 18, 2019 6:25 am
Forum: Announcements and Site Administration Topics
Topic: Straw Poll / Proposal for San Francisco Area mini-meetup
Replies: 33
Views: 17456

Re: Straw Poll / Proposal for San Francisco Area mini-meetup

I'll be at DesignCon on January 29–31, 2019 (Santa Clara Convention Center)
by Joe Gayo
Fri Jan 18, 2019 6:21 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 50kV Supply
Replies: 40
Views: 21420

Re: 50kV Supply

The EBay listing is the basis for my supply. AHV1IRT50N06-11 is only the high frequency transformer and multiplier section. You can see in the pictures I posted that I removed the cover and added a separate custom board. The green board with black electrolytic capacitors (among other parts) is a hal...
by Joe Gayo
Fri Jan 18, 2019 1:50 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Construction of Neutron Grade Fusor
Replies: 45
Views: 18419

Re: Construction of Neutron Grade Fusor

Spellman's DXM and SLM are built on the same platform and with several component changes and firmware you can convert one to the other. The lack of constant current and voltage fold-back with the DXM version makes stable operation with a plasma very challenging. You have a couple of options: - Conta...