Fusor Forums

I have been working on developing a Capacitively coupled ion source and Einzel lens for generating 30keV deuterons. Right now the source is being operated in DC discharge mode with just air. The anode is floating at 17kV and the cathode at 15kV. A chain of 400 volt zener diodes are used to self bias...

This post shows a magnetic mirror built recently by Tim Koeth, Jay Howson, myself and Jimbo Krutzler. It was a fun project!

Everything was acquired surplus. More to come! Enjoy the photos.

Ah, I see. I apologize, I misunderstood. Thought time was the x-axis . Nice plots.

Scott

Are you sure your units are right? I have never heard of anyone reaching 1E-10 with a turbo. Best I have seen is E-8. Perhaps someone with more experience can weigh in.

What are the time units? Minutes? Days?

Nice work though!

Scott

Joe, Your effort is really impressive and it definitely shows in the numbers. There has been a lot of talk recently that these smaller fusors are capable of outputting a higher neutron rate, for a given kW input, than larger 6-10" devices. Intuitively, I am on board with this. However, up until your...

I was interested in your 7-hole grid design. The models support the observations.

Simulation Video: https://www.youtube.com/watch?v=P5lp3Wu ... e=youtu.be

Initial distribution is circular, launched from the left with 0 KE. Grid at -60kV with respect to the chamber.

Richard, I strongly agree with this change. I believe the neutron club should make no mention of age. The longer the title of "worlds youngest" continues, the further this forum develops into a hand-holding community for 8-12 year olds attempting to build a fusor. First and foremost, I think this is...

https://www.youtube.com/watch?v=JjcX1yIQllA

The above simulation in SIMION clearly demonstrates the formation of star-mode. Only particular ions will be captured in stable, oscillatory orbits in an IEC device. Most are lost by collisions with the inner or outer grid.

Scott Moroch

Thanks for the information, Dan. I had absolutely no idea this was happening at my university. I will have to see if it is possible for me to sit in on some of the talks as the conference is a 5 minute walk from where I live. Very interesting abstracts.

Scott

After about 2 years of my fusor sitting disassembled in my basement, I finally had an opportunity to reassemble it. I have upgraded the high voltage feedthrough and am now using a turbo pump. Base pressure is now 5E-7 Torr. Here are pictures of the first plasmas with it. More runs up to 80kV are pla...