Search found 309 matches

by Mark Rowley
Mon Oct 21, 2019 4:59 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: My progress II
Replies: 40
Views: 10864

Re: My progress II

For a 2.75" system using a 30kV precipitator supply, those numbers seem about right for an air plasma. When you switch over to deuterium all those numbers will change.

Mark Rowley
by Mark Rowley
Sun Oct 20, 2019 8:18 pm
Forum: Announcements and Site Administration Topics
Topic: Almost all the FAQs are broken
Replies: 11
Views: 248

Re: Almost all the FAQs are broken

Frank, if it’s an unrealistic task to fix, can all the pics from the sites inception be uploaded to a specific or dedicated section? Even without the original posts, the photos alone offer valuable detail.

Mark Rowley
by Mark Rowley
Sun Oct 20, 2019 5:24 pm
Forum: Announcements and Site Administration Topics
Topic: Almost all the FAQs are broken
Replies: 11
Views: 248

Re: Almost all the FAQs are broken

Frank, I've been heavily going through posts from the beginning and it seems to be widespread with no distinct pattern (at least nothing obvious).

Mark Rowley
by Mark Rowley
Sat Oct 19, 2019 5:30 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: My progress II
Replies: 40
Views: 10864

Re: My progress II

Eduardo, Scott Moroch made these excellent simulation videos which depict ion recirculation patterns. The first two videos show the efficiency of the classic spherical grid design. The third video gives an idea of the limitations with your axial grid design. Spherical 1 https://www.youtube.com/watch...
by Mark Rowley
Sat Oct 19, 2019 1:50 am
Forum: Images du Jour
Topic: Cutting edge GM counter (1953)
Replies: 32
Views: 6438

Re: Cutting edge GM counter (1953)

Just for fun I used a 6.5 decade old PRI 111 Scintillator to detect x-rays coming off the fusor. The 111 goes to full deflection on the 2.5mR scale as I ramp it up from 22 to 25.5kV.

https://www.youtube.com/watch?v=w1cHW6TrhTU

Mark Rowley
by Mark Rowley
Tue Oct 15, 2019 9:24 pm
Forum: Images du Jour
Topic: Cutting edge GM counter (1953)
Replies: 32
Views: 6438

Re: Cutting edge GM counter (1953)

-QSL-

Mark Rowley
by Mark Rowley
Tue Oct 15, 2019 6:24 pm
Forum: Images du Jour
Topic: Cutting edge GM counter (1953)
Replies: 32
Views: 6438

Re: Cutting edge GM counter (1953)

Very similar Roberto. High probability the modules are the same.

Mark Rowley
by Mark Rowley
Tue Oct 15, 2019 7:30 am
Forum: Images du Jour
Topic: Cutting edge GM counter (1953)
Replies: 32
Views: 6438

Re: Cutting edge GM counter (1953)

Impressive! Doubt I'll progress to making my own circuit boards but who knows, retirement has been an interesting road so far. I'm far from a purist when it comes to restorations, but I just cant gut a detector unless its a totally corroded/rusted mess. Like to the point where identification of comp...
by Mark Rowley
Tue Oct 15, 2019 6:28 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Possible Sputter Conductivity Issues
Replies: 7
Views: 362

Re: Possible Sputter Conductivity Issues

This sounds interesting. And advance thanks John for the upcoming pics. It's definitely something I'll need to see to understand because incorporating what I'm visualizing seems electrically problematic....so obviously what I'm thinking is wrong. Unless I've missed it, I don't recall anyone else emp...
by Mark Rowley
Tue Oct 15, 2019 3:33 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Possible Sputter Conductivity Issues
Replies: 7
Views: 362

Re: Possible Sputter Conductivity Issues

I'm having a hard time picturing that. Wouldn't a copper end cap lessen the insulative spacing between fields?
Has anyone tried this in a Fusor?

Mark Rowley