Fusor Forums

I am by no means disagreeing with the statement: would "devour Deuterium like a vacuum cleaner." However, it is worth noting that larger systems maintain star mode at lower pressures. The fusor Tim Koeth and I built (larger than that chamber) maintains star mode between 2-4 mTorr. My 9" spherical ch...

Roberto, To your first question: yes, the bottom of the glass tube is the gas inlet Second question: Yes, I have read about those ratios. The spacing was increased for that photo to demonstrate variability. Ultimately the spacing will be based on a SIMION model I have built of the entire beam line. ...

Ian,

The ceramic on the Einzel Lens is Macor. The first and third electrodes of the lens are grounded and the middle is at a positive potential (400-1kV depending on desired focal length).

Scott

Ian, The ceramic is a high voltage break, electrically isolating the ion source from ground and allowing it to float at 20kV. See the full CAD rendering with a circuit below. The voltage drop across the diodes allows for a DC plasma discharge, and the voltage drop across the resistor is the extracti...

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.