I recommend using the unified standard for the cavity. For example, paper tube 10mm, length 60mm. A try different densities. And the smaller glass. About a 0,5-1mm. Liptakov
Laboratoř Liptákov your advice might be right, but I'd like to have a compact cap, further improvements might give a partial DDT. Now I've started again the assembly of my EBW at 5kV, I believe that no problem I'll have, I hope to finish it within this year.
I recommend using the unified standard for the cavity. For example, paper tube 10mm, length 60mm. A try different densities. And the smaller glass. About a 0,5-1mm. Liptakov
Laboratoř Liptákov your advice might be right, but I'd like to have a compact cap, further improvements might give a partial DDT. Now I've started again the assembly of my EBW at 5kV, I believe that no problem I'll have, I hope to finish it within this year.