Search found 1284 matches

by Frank Sanns
Mon May 03, 2004 6:58 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Grid support insulator
Replies: 10
Views: 3578

Re: Grid support insulator

<t>I was thinking the circuit would be between the conductive coating to the plasma. If you complete the circuit to the fusor shell, I think you will quickly exceed the breakdown of the ceramic insulator and get curent flowing where you don't want it.<br/> <br/> But I think you have much larger prob...
by Frank Sanns
Mon May 03, 2004 1:17 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Grid support insulator
Replies: 10
Views: 3578

Re: Grid support insulator

<t>Paul,<br/> <br/> Yes, that would work to distribute the charge. I could not figure out how you were energizing the inner grid. So what you propose is to use the insulating properties of the alumina tube all the way to the inner grid. Then starting at the grid, provide a somewhat conductive surfac...
by Frank Sanns
Sun May 02, 2004 10:48 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Grid support insulator
Replies: 10
Views: 3578

Re: Grid support insulator

<t>Paul,<br/> <br/> I see what you are trying to do but the problem is that the 1/r is going one direction for the E field of the fusor but the opposite direction for the feedthrough. The highest negative potential is at the inner grid and the lowest is the grounded outer grid or shell. <br/> <br/> ...
by Frank Sanns
Sun May 02, 2004 10:05 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: 5 nCi radium check sources at your local supermarket
Replies: 2
Views: 1729

Re: 5 nCi radium check sources at your local supermarket

<t>Nice peak Richard. <br/> <br/> When I first started to monitor radiation while I was getting my fusor setup. I kept getting high backgrounds. After buying an alpha scintillator I found that it was radon. After the remediation the alphas were gone but the background just in the area near the fusor...
by Frank Sanns
Sun May 02, 2004 2:45 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Grid support insulator
Replies: 10
Views: 3578

Re: Grid support insulator

<t>Paul,<br/> <br/> If you make it conductive then it will have a high E field like the grid and symetry will be very bad then. Ions would be attracted along the entire length of the feed and not just to the inner grid. I think the small insulator occupies a small part of the volume of the fusor and...
by Frank Sanns
Sun May 02, 2004 12:14 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: 5 nCi radium check sources at your local supermarket
Replies: 2
Views: 1729

5 nCi radium check sources at your local supermarket

<r>I was following some of the links on natural radioactivy of different regions of the world and I came across this information. <URL url="http://www.physics.isu.edu/radinf/natural.htm">http://www.physics.isu.edu/radinf/natural.htm</URL> . If you scroll down near the bottom it says that a Kg of bra...
by Frank Sanns
Fri Apr 30, 2004 7:46 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: some mathematical wranglings
Replies: 29
Views: 7835

Re: some mathematical wranglings

<r>Paul,<br/> <br/> Here is the link to a description and picture of my setup. Outer grid is 10" in diameter.<br/> <br/> <URL url="http://www.fusor.net/board/viewtopic.php?f=18&t=7705#p55664"><LINK_TEXT text="viewtopic.php?f=18&t=7705#p55664">http://www.fusor.net/board/viewtopic.php?f=18&...
by Frank Sanns
Thu Apr 29, 2004 8:14 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: some mathematical wranglings
Replies: 29
Views: 7835

Re: some mathematical wranglings

<t>Paul,<br/> <br/> I looked back at my notes on the pressure photos. They were air for that particular sequence. I do not have a full version of pressure drop with deuterium becasue it would use too much gas as my chamber is quite large.<br/> <br/> The appearance would be nearly identical with deut...
by Frank Sanns
Wed Apr 28, 2004 9:28 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Fusor@40kV+Electronics=Danger
Replies: 8
Views: 3626

Re: Fusor@40kV+Electronics=Danger

<t>Jon, <br/> <br/> I do not know if you are using a filter capacitor in your HV feed or not but there can even be quite a bit of capacitance in a high voltage transformer. When the fusor demands more current, the capacitance supplies it very quickly giving EMP or brief RF oscillations. This is stil...
by Frank Sanns
Wed Apr 28, 2004 9:19 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: some mathematical wranglings
Replies: 29
Views: 7835

Re: some mathematical wranglings

<t>Paul,<br/> <br/> I hate to break the news to you but there is no fusion in any of the pictures except maybe the last one. The voltage was probably around 15 kv or so. I don't remember the exact conditions but in the first picture the current was probably micro amps. As the pressure comes down, th...