Search found 1318 matches

by John Futter
Sun Dec 09, 2018 6:41 pm
Forum: New User Chat Area
Topic: Negative Polarity Power Source?
Replies: 11
Views: 1054

Re: Negative Polarity Power Source?

for a demo fusor you can use a positive supply just as some use an AC supply ie neon transformer with no diodes
by John Futter
Thu Dec 06, 2018 6:04 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Testing Monazite using high resolution scintillators
Replies: 4
Views: 301

Re: Testing Monazite using high resolution scintillators

Sean
The slewing of the spectra for the NaTl seem to be either too much dead time ie MCA not ready for next pulse or a damaged NaTl scintillator

I check sometime next week on the one i use (ortec 2"x2" Natl with a similar spectra
by John Futter
Tue Dec 04, 2018 9:30 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Please Help Quantify X-Rays
Replies: 8
Views: 457

Re: Please Help Quantify X-Rays

sam
only a few dd's result in tritium
most result He4 so your calcs are overly generous in T^3 production
by John Futter
Tue Dec 04, 2018 2:58 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Please Help Quantify X-Rays
Replies: 8
Views: 457

Re: Please Help Quantify X-Rays

With your power supply the only point that x-rays can leave is through the view port. If the view port is covered with lead glass than then this escape route is closed. As to the production of tritiumin a fusor so little is made that it is almost impossible to measure with extremely sensitive equipm...
by John Futter
Fri Nov 30, 2018 11:35 pm
Forum: Advanced Technical Discussion Area
Topic: Alternative Reactor Design
Replies: 25
Views: 6392

Re: Alternative Reactor Design

For gods sake stop repeating what others have written
you are not paying for the server data storage are you????
We can all read and seeing it posted again is a pain in the backside
by John Futter
Mon Nov 19, 2018 6:58 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor from Poland
Replies: 8
Views: 915

Re: Fusor from Poland

I suggest changing your gas to Argon and run at around 10kV or below to glow clean the interior of your fusor
and couple of hours of this in timed runs so as to not heat the chamber too much then change back to D2 and see what happens
by John Futter
Mon Nov 19, 2018 6:47 pm
Forum: New User Chat Area
Topic: Feedback on an auction: Leybld Turbovac 50 + D4B + Controller + Appendage
Replies: 5
Views: 349

Re: Feedback on an auction: Leybld Turbovac 50 + D4B + Controller + Appendage

You have the TMP150 why not ty and find a NT20 controller these are much more robust than the NT10 /NT13 as used for the tmp50. It is the bad design of the NT10 and NT13 that makes them extremely rare to find surplus as most have already blown up. That is why I designed a universal controller @ work...
by John Futter
Mon Nov 19, 2018 2:48 am
Forum: Announcements and Site Administration Topics
Topic: Finished PhD, now a postdoc at MIT
Replies: 8
Views: 740

Re: Finished PhD, now a postdoc at MIT

Well done Andrew

hope the future brings many neuts
by John Futter
Sat Nov 17, 2018 5:45 am
Forum: New User Chat Area
Topic: Good Auction? [Leybold Turbovac 150]
Replies: 6
Views: 385

Re: Good Auction? [Leybold Turbovac 150]

You can make your cables for this pump the pump uses a standard octal valve (Tube) Socket if you build your own controller like I have then the other end of the cable is what you have on hand There are about 5 differing controllers for this pump from Leybold The latest is one that does the 150 throu...