On Fri, Aug 29, 2014 at 12:48 PM, Jerry Biehler  wrote:
> If you are trying to get to 10^-8 right now forget the stopper. It is never
going to happen with a seal like that. How many connections do you need? What
kind of pump are you using to get that low? What kind of chamber?

Oh, why not? I mean, the seal on the blocking plate is just a Viton o-ring...

The setup is an FEI 200 xP, it's got a roughing pump, a turbo, and a ion trap.

I need at least 3 wires to begin, I might be able to get away with 2
if I use the feed-through metal for the ground.
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