Search found 95 matches

by UG!
Tue Dec 07, 2010 10:43 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: POPS
Replies: 30
Views: 11599

Re: POPS

<t>I have pondered upon this.<br/> <br/> The Fusor is a vacuum tube. Maybe it would be possible to design a grid structure that is self amplifying, like a large amplifying valve, that could be provided with a (heavily decoupled) DC HV and maybe a couple of Watts of RF on a control grid. Using the fu...
by UG!
Fri Nov 12, 2010 12:49 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Radiation issues - Chernobyl
Replies: 8
Views: 2735

Re: Radiation issues - Chernobyl

<t>With Human cells the first exposure will almost certainly not cause a cancerous cell. Human cells are very good at both repairing DNA damage then self destructing if the repair turns out to be wrong. In order for a cancer to form it is usually the case that the mechanisms for self repair or detec...
by UG!
Tue Dec 09, 2008 12:51 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Electron beam loop
Replies: 6
Views: 3556

Re: Electron beam loop

<t>I have thought about using electron beams to weave a 'grid' but I suspect there would be space charge issues with the + ions de-focusing the e-beam. When I get back to actually making stuff I plan to experiment with a cylindrical topology both using a spiral e-beam grid and a hollow 'doughnut' pr...
by UG!
Mon Nov 24, 2008 12:48 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusion test run- without fusion.... (weired light effects..)
Replies: 4
Views: 2693

Re: Fusion test run- without fusion.... (weired light effects..)

Great to see your making good use of that chamber!

Keep up the good work

Oliver
by UG!
Mon Oct 06, 2008 12:09 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: S.T.A.R. - Evolution in progress
Replies: 17
Views: 4511

Re: S.T.A.R. - Evolution in progress

Try loudspeaker magnets of you have any old speakers lying about. The big ones tend to have slightly larger holes than magnetron magnets.

Oliver
by UG!
Sat Sep 20, 2008 1:45 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Making Your Own Vacuum Tubes / Ion Guns
Replies: 2
Views: 4207

Re: Making Your Own Vacuum Tubes / Ion Guns

Thats one of the coolest things i have seen in quite some time. There's a wealth of information on how to work with hot glass in that video. wonder if he has a site to go with it.

Oliver
by UG!
Thu Sep 18, 2008 12:49 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: simulation
Replies: 1
Views: 1834

simulation

<r>Just wanted to draw this to peoples attention. Nvidia has released a driver to allow their GPUs to be used as processors to help in simulating physics in games. Its not hard to imagine how this could be applied to simulating a fusor. modern GPUs are 2-3 times faster at this sort of thing than eve...
by UG!
Tue Feb 19, 2008 3:49 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Nedd help with divider network / datasheet of PMT Thorn EMI 9924 B/2
Replies: 8
Views: 4073

Re: Nedd help with divider network / datasheet of PMT Thorn EMI 9924 B/2

<t>if it was me, i'd try to take appart that metal caseing and see whats going on inside, you never know how it was used previously. check all the resistor values if you do.<br/> <br/> i'd test it with a proper scintilator. PMTs are designed to detect a few photons, if you give it too many you end u...
by UG!
Tue Feb 19, 2008 3:28 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Tungsten needle cathode
Replies: 14
Views: 8564

Re: Tungsten needle cathode

<t>could a picture of the profile of the plasma be taken? i'm assuming the plasma pic is end on, so were just seeing a hot ball, it would be interesting to see to what extent the rest of the needle is surrounded by plasma, and weather it is a ball at the tip, beyond the tip, in sheath covering the w...
by UG!
Thu Feb 14, 2008 9:40 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: EUKITT for watertight embedding of Scintillatir (NaI)
Replies: 4
Views: 2007

Re: EUKITT for watertight embedding of Scintillatir (NaI)

<t>i once had such a sealed assembly that had turned yellow and cloudy. i removed the crystal (carefully avoiding contact with the perculior extremely hydrophobic white powder that serounded the thing) and put it in a vacuum chamber in the hope i could remove some of the absorbed watter. in this i f...