Search found 1255 matches

by Frank Sanns
Mon Apr 27, 2020 11:54 pm
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

I have a round piece of leaded glass that is barely yellow and does the job of shielding from electron beams and x-rays. It is good up to around 40kv then x rays start leaking from feed throughs and the shell but it is nice to have in place when you need to see into the dragon's lair.
by Frank Sanns
Sun Apr 26, 2020 5:06 pm
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

Yes, and will all that is going on in there it has to be down to around 3 eV before we see it! Talk about energy loss.
by Frank Sanns
Sun Apr 26, 2020 2:25 pm
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

Looks like you are make good progress Jim. You won't see an electron beam in a Fusor. The pressure is too low. The mean free path is multiple km so there is no significant interaction of electrons with the plasma. As you have noted though, you will see the fluorescence of the electron beam impinging...
by Frank Sanns
Fri Apr 24, 2020 5:38 pm
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

Nice work Jim. My only comment to you and Richard again is symmetry. This configuration is VERY critical for beam paths. The proof of this is in your own photos with the feathered beam on one side and a better formed one on the other side. When I was out at Jon Rosenstiel's this past January, I had ...
by Frank Sanns
Fri Apr 10, 2020 4:13 am
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

Part of the issue that I have with this thread has nothing to do with your work Jim. It is the fact that Richard and I have not moderated it so that the technical discussions occur elsewhere on the forum rather than in your showcase thread. This is YOUR images thread and as such the rest of us shoul...
by Frank Sanns
Thu Apr 09, 2020 5:08 pm
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

Jim, Somehow my post response to you was lost. I think you may have deleted your post while I was responding. Here is another try. No insult intended to you or Richard. My post was more directed at the new work that Richard is doing. I just did not want him to give up. When I was out visiting Jon Ro...
by Frank Sanns
Thu Apr 09, 2020 3:39 pm
Forum: Images du Jour
Topic: Jim Kovalchick -My attempt at smaller fusor
Replies: 86
Views: 9419

Re: Jim Kovalchick -My attempt at smaller fusor

What is the goal here; high neutron numbers or understanding how these contraptions work? It is an important question. In my iterations of multiple grid electrodes, needle points, plasma electrodes, reverse polarity, non symmetrical, and the like, there is a different set of operating conditions tha...
by Frank Sanns
Sun Apr 05, 2020 1:44 am
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 135
Views: 20508

Re: Coronavirus pandemic

Actually, it is not looking good at all long term. This is not going to end or even abate in 30 more days or even 60 or probably 90 and beyond. Until there is a vaccine or, a long time from now, herd immunity, we have a long ways to go. This is really only starting since only a fraction of a percent...
by Frank Sanns
Tue Mar 31, 2020 1:34 pm
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 135
Views: 20508

Re: Coronavirus pandemic

The preparedness issue can be discussed forever. The key was that it was unexpected. Stopping travel from China and even trying to stop the people from the cruise ships coming back to the US until they were clear saved many lives and delayed the virus being unleashed on our shores. I have talked to ...
by Frank Sanns
Fri Mar 27, 2020 8:39 pm
Forum: Fusion --- Past, Present, and Future
Topic: Farnsworth Questions
Replies: 22
Views: 4499

Re: Farnsworth Questions

Thanks for the info Richard. To continue and clarify my earlier statement, there were some design elements of the Cave Fusor that were interesting. The ion gun side arm was fed through a small hole in a larger otherwise solid inner cathode. There were six such ion guns and six small holes in the inn...