Search found 111 matches

by Joe Gayo
Wed Jun 05, 2019 2:42 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

I have two fresh bubble dosimeters on order for absolute certainty. I believe several factors are driving these higher numbers (some recent runs are significantly higher than previously reported). - 75kV @ 12mA max - I've performed comparative runs at varying axial magnetic field strength (0 - 500 g...
by Joe Gayo
Tue Jun 04, 2019 2:27 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

The strategy was to use both calibrated detectors to provide greater confidence in the result. For example, the detector at 160cm has been well characterized, shielded from electronic interference, and precisely instrumented.
by Joe Gayo
Mon Jun 03, 2019 8:53 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

The is Ludlum sphere has a surface area of 1195 cm^2 and cross section of 299 cm^2 Maybe I'm missing something, but the Ludlum is calibrated to show uSv/h with a inverse RPG curve (that's pretty accurate at 2.45MeV) so the detector area is already considered in the measurement. Isn't the calibrated ...
by Joe Gayo
Mon Jun 03, 2019 5:16 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

A second detector was used (@160 cm), it read 7.8M n/sec based on it's previous calibration. The detector @40cm wasn't monitored because it's un-calibrated. The bubble detector I have is now expired. The bubble detector was used previously from runs between February and April (http://www.fusor.net/b...
by Joe Gayo
Mon Jun 03, 2019 3:49 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

I have three neutron detection systems: 1. A BF3 tube / LDPE moderator placed 40 cm from the cathode 2. A BF3 tube / LDPE moderator placed 160 cm from the cathode - calibrated with 54 bub/mrem dosimeter (Feb - April) 3. Ludlum 12-4-7 (x10 scale, slow 22 sec) placed 50.8cm from the cathode - calibrat...
by Joe Gayo
Mon Jun 03, 2019 6:12 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

944224C4-741E-4941-9568-E9C97C68D09E.jpeg
Calculations
This may be the highest Q for an amateur device.
by Joe Gayo
Sun Jun 02, 2019 10:47 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 27476

Re: Joe Gayo's lab tour

Thank you, Richard, for the kind words. I've been fortunate to have studied power electronics and physics which gives a solid foundation to build, modify, and repair NIMs, power supplies, and controllers. I performed all the mechanical design but used a local machinist who is a friend and was willin...
by Joe Gayo
Sun May 26, 2019 6:27 am
Forum: Announcements and Site Administration Topics
Topic: Joe Gayo's Lab Tour
Replies: 14
Views: 10278

Re: Joe Gayo's Lab Tour

Greenwich Mean Time is 7 hours ahead of Los Angeles, CA
by Joe Gayo
Sun May 26, 2019 4:48 am
Forum: Announcements and Site Administration Topics
Topic: Joe Gayo's Lab Tour
Replies: 14
Views: 10278

Re: Joe Gayo's Lab Tour

Just a reminder:

My YouTube channel will have a live tour of my lab starting Sunday, May 26th at 12 noon PDT. Please join and ask questions!

https://www.youtube.com/channel/UCu4DHf ... tY8hvGP-EQ