Dear All,
just to add the perspective from the synchrotron side - these type of
failures are actually extremely rare. Of course, this doesn't help if it
is your crystals that have been thawed, but these stories should not
dissuade you from shipping crystals. On MASSIF-1 at the ESRF all
crystals are shipped - we have processed over 56,000 in the last 5 years
and I have seen only one dewar failure on arrival. I think the advice
sent already is very sensible - test the dewar before you send it off
and make sure the pucks are tightly packed inside. No matter which
courier you choose, or how many times you contact them to be careful,
there are so many links in the chain that I shudder to think of what
happens to our dewars during there travels - fortunately it is
remarkable how robust they are.....
Best wishes, Matt.
On 24-Jun-20 9:26 PM, Patrick Loll wrote:
Hello community,
We recently had a dry shipping dewar fail catastrophically (while en
route to the beam line, so, major trauma). I sent it to a company that
specializes in repair and refurbishing of cryogenic tanks, and they
told me it has an internal leak, and hence is not reparable. I was
expecting that the valve had failed, so the internal leak diagnosis
came as a surprise.
Has anyone else had a similar experience? Any ideas about how an
internal leak might come about? The dewar is (was) a Taylor/Wharton
CX100, and it was traveling in its bespoke shipping case.
Thanks for any insights that might satisfy my curiosity and/or prevent
future mishaps of this sort.
Cheers,
Pat
__________________________
Patrick J. Loll, PhD
Professor of Biochemistry & Molecular Biology
Drexel University College of Medicine
Room 10-102 New College Building
245 N. 15th St.
Philadelphia, PA 19102-1192 USA
(215) 762-7706
pj...@drexel.edu <mailto:pj...@drexel.edu>
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Matthew Bowler
Synchrotron Crystallography Group
European Molecular Biology Laboratory
71 avenue des Martyrs
CS 90181 F-38042 Grenoble
France
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