Search found 1294 matches

by John Futter
Mon Sep 17, 2018 9:31 am
Forum: Files
Topic: Paper on neutron counting using ZnS(Ag) phosphors
Replies: 8
Views: 464

Re: Paper on neutron counting using ZnS(Ag) phosphors

roberto /Jon I made a neutron scintillator setup a few yago and posted it here to how i did it. It used Zns Ag etc and worked well all but for the few seconds delay. So its not prompt but i tested it in our magnet room @ work while a 900kV deuteron beam was in use. Quite a few neuts run around the m...
by John Futter
Thu Sep 13, 2018 3:30 am
Forum: New User Chat Area
Topic: Questions on refilling Hydrogen tank
Replies: 4
Views: 524

Re: Questions on refilling Hydrogen tank

I would leave a bit of hydrogen in the tank --just positive pressure so as to 2nd guess the idiot at the depot who will crack the valve to make sure it is nearly empty. This save air being sucked back in
by John Futter
Sat Sep 01, 2018 6:52 am
Forum: New User Chat Area
Topic: What flange is this?
Replies: 5
Views: 633

Re: What flange is this?

Again Harrison you have obiviously not read how to post on this forum Users should not link to external web sites especially Ebay and the like as these pics will dissappear leaving a thread that does not make sense especially to new members trying to learn what to do. Save a pic from the site and up...
by John Futter
Tue Aug 28, 2018 5:18 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Neon sign transformer power: a new look
Replies: 7
Views: 1426

Re: Neon sign transformer power: a new look

so just to clear up the graphs
Blue = Real R load
Black dashes = immaginary reactance and grey line - mixture of both
by John Futter
Thu Aug 23, 2018 7:01 pm
Forum: The Trading Post
Topic: *Working* Agilent/Varian turbomolecular pumps & controllers
Replies: 2
Views: 410

Re: *Working* Agilent/Varian turbomolecular pumps & controllers

Alex how about following the forum rules
your first post should have been in the please introduce yourself forum
by John Futter
Thu Aug 23, 2018 6:59 pm
Forum: New User Chat Area
Topic: Chamber contamination by vacuum grease
Replies: 22
Views: 1868

Re: Chamber contamination by vacuum grease

That O-ring is your problem
O-rings must be smooth and round in crossection any deviation from this will cause a leak.
Only apply vacuum grease to O-ring and then only enough to make the O-ring look wet
by John Futter
Wed Aug 15, 2018 10:07 am
Forum: Images du Jour
Topic: Demo Fusor
Replies: 2
Views: 317

Re: Demo Fusor

you are almost there
Calculate it out and report back --ps quite a simple calc
by John Futter
Wed Jul 25, 2018 7:02 pm
Forum: New User Chat Area
Topic: Trying for Tritium
Replies: 6
Views: 489

Re: Trying for Tritium

Harry
I see no reason that you could not do this as long as it is legal
It is the legality thing that nearly all here cannot be.
This is why talk of Tritium fusion is discouraged on this site
by John Futter
Sun Jul 22, 2018 7:19 pm
Forum: Announcements and Site Administration Topics
Topic: How did you find our Fusor forum?
Replies: 8
Views: 780

Re: How did you find our Fusor forum?

Frank
Time to call google help and ask them what they are doing

I found this site in 2004 (google) as I was applying for a job in an ion beam lab
IE I was up skilling myself for the interview

It worked
by John Futter
Tue Jul 17, 2018 10:40 am
Forum: Images du Jour
Topic: Killer deal on a GeLi gamma spec
Replies: 6
Views: 777

Re: Killer deal on a GeLi gamma spec

you could try redrifting the GeLi crystal to get it to work again
But I think you will wane on keeping it cool
so good dewar and electronics