by Doug Coulter » Fri Nov 13, 2015 4:49 pm
Welcome to the pros, Bob.
We have been doing much the same here, but have sort of settled on something that seems to work the best of the things we've tried, and which satisfies the "it makes sense" feeling.
That would be an accurately built cylindrical grid (one end open) in a cylindrical sidearm of our big tank, in our case. Every time we get to better build accuracy out output and Q seem to go up.
This is interesting because even on a visible light wavelength level, the best we make might as well be a funhouse mirror - at the shorter De Broglie wavelengths of the stuff in a fusor - ridiculous, but it seems better is still better.
Posting as just me, not as the forum owner. Everything I say is "in my opinion" and YMMV -- which should go for everyone without saying.