Search found 1321 matches

by John Futter
Wed Dec 12, 2018 6:46 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Testing Monazite using high resolution scintillators
Replies: 6
Views: 391

Re: Testing Monazite using high resolution scintillators

80,000 pulaes per sec could incurr 10% deadtime or more with NaTl which will slew spectra and seriously widen FHHW response hiding the rest of the spectra
as for FAST ADC's this is what I use
https://www.fastcomtec.com/?id=409
by John Futter
Wed Dec 12, 2018 6:10 am
Forum: Fusion --- Past, Present, and Future
Topic: Wendelstein 7-X has successfully finished its second major experimental run
Replies: 13
Views: 672

Re: Wendelstein 7-X has successfully finished its second major experimental run

Ameen
no problem you now understand

I for one like the ability to edit --this was taken away from all of us for quite a while because of miss use
that left a whole lot of threads hanging not making sense because the original poster deleted making all following comments nonsense
by John Futter
Tue Dec 11, 2018 6:23 am
Forum: Fusion --- Past, Present, and Future
Topic: Wendelstein 7-X has successfully finished its second major experimental run
Replies: 13
Views: 672

Re: Wendelstein 7-X has successfully finished its second major experimental run

Ameen obviously you read this http://english.hf.cas.cn/new/news/rn/201811/t20181113_201186.html before making your last statement if not I would do a minor web search first (like I did) so as to not embarras myself I SEE ameen HAS EDITED OUT HIS PROVOCATIVE ANTI CHINA PART OF HIS LAST POST This leav...
by John Futter
Sun Dec 09, 2018 6:41 pm
Forum: New User Chat Area
Topic: Negative Polarity Power Source?
Replies: 11
Views: 1236

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: 6
Views: 391

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: 516

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: 516

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: 6476

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: 965

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