Silver Solder for HV Insulator

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Luke Harrill
Posts: 45
Joined: Sun Jan 01, 2017 2:25 pm
Real name: Luke Harrill
Location: SC/TN, USA

Re: Silver Solder for HV Insulator

Post by Luke Harrill »

Update! I decided to test the seal before I installed the stalk.

I plugged the top of the feed through by polishing it and placing a rubber stopper under a SS cap (with a tiny bit of Apizon M). I pulled down to 25 microns and turned on the turbo. I got down to 6.00E-5 torr before sealing off the chamber with the valve. It initially had a leak (or outgassing) rate of 5min/micron. I consider this to be decent, as only the viewport and 6" flanges were copper gaskets that were properly torqued. The others were viton and just hand estimated.

-Luke Harrill
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Richard Hull
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Joined: Fri Jun 15, 2001 9:44 am
Real name: Richard Hull

Re: Silver Solder for HV Insulator

Post by Richard Hull »

It sounds like you've got a nice seal there on the base...Now onto the grid stalk and a final test. You are doing it all correctly. Baby steps all along the way allow you to verify good vacuum sealing at each step.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
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