You are viewing a single comment's thread from:RE: Fun with TEM gutsView the full contextalihusain (25)in #science • 5 years ago What's all that gunk in the middle of the hole in the second picture?
Leftover Indium Seal, which I later removed.
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On that note, why do they use indium seals to begin with, rather than usual copper gaskets for high vacuum?
I think that because the liner tube is pretty thin, because the bore through the lenses is pretty small. The pressure required to make a copper seal would cause the liner tube to buckle.
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