Dear AMMRL,
We have a very old round-bottom 600 MHz magnet from 1999 that I am told can
no longer be refurbished with any warranty, yet it is becoming too costly
to keep filled. Therefore I am planning to quench it, but want to do so safely.
Do any of you know of ‘instruction sheets' or guidelines available
for this rare procedure?
In case you are willing to comment and correct, I will appreciate it:
my plan is to allow the He level to come down to ≈35% while keeping
up with N2 fills.
Remove all the hardware that is not related to the magnet itself (e.g. probe
etc, lower the legs).
Remove the sealing caps on the tops of the lHe reservoir and lN2 reservoir
so that there are unobstructed exit paths.
Attach a gaseous He tank to the port of the dewar vacuum space, with a low
pressure of He via a needle valve (and of course a regulator).
Crack open the valve on the vacuum space to admit He gas. (I could also fill
a large ‘bottle' with He gas and connect that, instead of a regulated
cylinder.)
Promptly back away to a safe distance with good ventilation.
Many Thanks in advance,
and I will know that no advice provided mades the provider legally responsible,
Anne-Frances
Novel Meritorious Research (and teaching)
—•—•—•—•â=
€”•—•—•—•â€=
”•—•—•—•—=
•—
A.-F. Miller, Ph. D. (she/elle/sie)
University Research Professor
Professor of Chemistry
University of Kentucky
https://www.uky.edu/*afm/
Visiting Fellow,
Einstein Foundation of Berlin
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Received on Wed Dec 06 2023 - 14:35:42 MST