Search found 1170 matches

by John Futter
Wed Jan 29, 2020 5:56 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor Running, No Neutron Detection
Replies: 23
Views: 439

Re: Fusor Running, No Neutron Detection

I would have thought 2" thick wax moderator all round would have been enough
Too much absorbs all ie thermalized to zero. I know our Cosmic neut He3 counters only use 6" thick moderators and the cosmics are much higher in energy than DD fusion
by John Futter
Wed Jan 29, 2020 12:53 am
Forum: Vacuum Technology (& FAQs)
Topic: Safety check of an old glass bell jar before use
Replies: 5
Views: 117

Re: Safety check of an old glass bell jar before use

Rich Interesting question but no the SOP says you can only take the wire basket off when the chamber is up at atmosphere (I wrote the SOP) The black thing on top of the chamber is the wire basket belljar underneath and aluminium foil in side the belljar to limit how much film gets on glass DSC01703....
by John Futter
Tue Jan 28, 2020 6:04 pm
Forum: Vacuum Technology (& FAQs)
Topic: Safety check of an old glass bell jar before use
Replies: 5
Views: 117

Re: Safety check of an old glass bell jar before use

We use these daily at work in evaporation work. We use a wire basket scatter shield when pumping down and when under vacuum. The only time one has broken is during cleaning by some ham fisted idiot dropping it your technique with the blankets is valid if you do not have a scatter shield --a wire typ...
by John Futter
Wed Jan 22, 2020 5:50 pm
Forum: Vacuum Technology (& FAQs)
Topic: TC Gauge: AC/DC heater
Replies: 2
Views: 264

Re: TC Gauge: AC/DC heater

AC/DC doesn't matter
all that matters is heater power must be correct for the tube in use
by John Futter
Mon Jan 20, 2020 10:39 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Help Finding a Transformer Core Part
Replies: 5
Views: 279

Re: Help Finding a Transformer Core Part

Pull a MOT apart for spare laminations
you can cut with tin snips or similar
by John Futter
Wed Jan 15, 2020 6:06 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Construction
Replies: 33
Views: 16261

Re: Vacuum Chamber Construction

Nic
You need some scraps of stainless about the same thickness as you are going to weld in anger
stainless is very much different from steel to weld --infact I find stainless much easier --but I was taught how to weld on Stainless

good Luck
by John Futter
Tue Jan 14, 2020 5:54 am
Forum: Vacuum Technology (& FAQs)
Topic: Used E2M2 Cleanup
Replies: 4
Views: 550

Re: Used E2M2 Cleanup

Edwards pumps do not rise appreciably in pressure when ballasted If the ballast is working the pumpsound will change with a higher pitched gurgling sound It is important that the ballast works as you use it for 20 -30 minutes to allow it to get rid of water vapour that is consistant with your report...
by John Futter
Fri Jan 10, 2020 3:58 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: TA DA New Use of Plasmas
Replies: 10
Views: 686

TA DA New Use of Plasmas

It may not be the panacea to provide the World with limitless energy BUT You will live happily ever after if you get one ------aledgedly https://www.resonantlight.com/perl-mplus?gclid=EAIaIQobChMI9ZP64M7z5gIVFBJoCh32OQnBEAEYASAAEgI_8_D_BwE Where do these people come from ??????!!!! and more importan...
by John Futter
Sun Jan 05, 2020 6:32 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: CMOS Neutron Detection
Replies: 4
Views: 209

Re: CMOS Neutron Detection

Jim some time back I destroyed a new colour CCD camera at work taking pics Cherenkov radiation of a 12MeV 22nA proton beam in air. https://fusor.net/board/viewtopic.php?f=19&t=7995 If you play the vid frame by frame you can see the CCD damage some of which is temporary while some is permanent. The n...