With sealing under pressure, I'd be looking for ways to drop the internal p=
ressure, thermally or by pump or ??.
You probably could do a seal under light positive internal pressure, but I =
think it wouldn't be pretty.


-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 William Westfield
Sent: Wednesday, November 1, 2017 7:35 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Vacuum plumbing


> I've done some sealing of volatile liquids (elemental Bromine) in pyrex a=
mpoules and I found it very challenging to get a technique down.

I would imagine that the issues with sealing evacuated glassware are somewh=
at different than sealing an ampoule with contents at or above 1Atm.  In th=
e vacuum case, you have atmospheric pressure on your side...

BillW


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