Greetings, and hope for a happy new year to all!
About the middle of last November, I posted a request for advice
about how to move an R2D2 magnet at field. I received _many_
helpful replies which, among other things, educated me that the
magnet I had been asked to assist with was not in fact a Varian
R2D2, but an Oxford Alox. I also received the loan of a lifting
harness; one of my initial puzzlements had been how to proceed
in the absence of any sort of lifting lugs at the top of the
cryostat.
Unfortunately, we didn't get the opportunity to try moving it at
field, because it quenched a few days before the move was scheduled.
It seems that the LHe hold time had deteriorated until the magnet
required refilling with LHe every week (!?!), and because of holiday
vacation schedules, it went long enough to run out of LHe and quench.
The owners would like for me to try to re-commission it for them on
the cheap, but they don't have the energization stick, shorting plug
removal tool, or appropriate blow-out tube. I am considering the
advisability of undertaking this, and would appreciate A) any advice
that anyone who has ever re-commissoned one of these is willing to
offer (I have experience with moving and re-commissioning quite a
few different Oxford magnets over the last ~ 25 years, but from
my perusal of the manual, this is quite a different beast); and B),
is there anyone out there who is in possession of these tools and
would be willing to loan/rent them out long enough for us to try
and get this thing back up to field? I have Oxford magnet power
supplies, SC shim supplies, vacuum pumping equipment, etc.
Regards,
John Wright
Dr. John M. Wright, Dept. of Chemistry & Biochemistry, M/S 0314, UCSD,
La Jolla, CA 92093-0314; email: jwright_at_ucsd.edu; phone: (858) 534-3049
Received on Mon Jan 13 2003 - 10:59:46 MST