I have a plastic chamber with a metallic base now, to test the system. In the plastic cylinder, I was wondering if insulating AROUND the outer grid supports (with say alumina tubes), and thus minimizing any electric field around them, would prevent distortion of the electric field near the outer grid and improve field symmetry. In other words, it is my understanding, that for optimal focusing, the inner grid wants to "see" a uniform, symmetrical and grounded outer grid shell. Or are uniformity and symmetry not important, as as long it is grounded?
What about the ports in a spherical metalic chamber, don't they slightly distort the spherical continuity and symmetry of the chamber? If this is true it is especially important as the chamber size gets smaller (for a given port size). This could be minimized by placing stainless steel screens molded to the same curvature of the chamber, over the ports, on the inner surface of the chamber. Or is this just unnecessary overkill?
The demo fusor will eventually be a stainless steel 8" diam sphere. I should have the spherical chamber later this week or next week.
So you are saying that I just need to ground the sphere and use NO outer grid, that is the chamber IS the outer grid?
Created on Monday, May 14, 2001 4:43 PM EDT by Thomas D Dressel Last Modified on Tuesday, May 15, 2001 10:30 AM EDT by Thomas D Dressel