electric isolation of the feed through on the vacuum side
Posted: Thu Jul 05, 2012 10:43 am
Hi,
amazon supply and mcmaster are not willing to export alumina tubes to Europe and I was not able to find a supplier here in Europe for them, so I was wondering how important it is to isolate the connection between the feed through and the grid.
Do I need any at all, it the distances are big enough to the chamber walls and the sharp edges of the flanges? Should I put the connection into a wider borax glass cylinder, or wont that do or help? I have a borax glass cylinder about 7cm wide (2-3 inches?). The connection has a wider radius than the wire on the grid, so the electric field should be weaker around the connection than at the grid.
Should I put some aluminum foil into the chamber around the flanges to protect their sharp edges from attracting a spark and damaging them?
Can one of you tell me about experiences with sparking, how likely is it, how often does it happen...
Thanks in advance,
Alex
amazon supply and mcmaster are not willing to export alumina tubes to Europe and I was not able to find a supplier here in Europe for them, so I was wondering how important it is to isolate the connection between the feed through and the grid.
Do I need any at all, it the distances are big enough to the chamber walls and the sharp edges of the flanges? Should I put the connection into a wider borax glass cylinder, or wont that do or help? I have a borax glass cylinder about 7cm wide (2-3 inches?). The connection has a wider radius than the wire on the grid, so the electric field should be weaker around the connection than at the grid.
Should I put some aluminum foil into the chamber around the flanges to protect their sharp edges from attracting a spark and damaging them?
Can one of you tell me about experiences with sparking, how likely is it, how often does it happen...
Thanks in advance,
Alex