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Kovar sleeve viewports are fine yes down into UHV. We don't use them because standard viewport shapes are very limiting. I guess you could have an operation l
by avsteele 5y ago
Kovar sleeve viewports are fine yes down into UHV. We don't use them because standard viewport shapes are very limiting.
I guess you could have an operation large enough to custom fabricate something, but that's not in my experience
- rainbowzootsuit 5y agoI've used a feed throughs that came as CF bored out with a borosilicate stubs already attached, so that you can fabricate your own glass without having to know about the metal-glass bonding. I'm not sure how big those get if you're trying for viewport style usage.