Our new 500 MHz magnet drifts with the rate 8 Hz/hr (Oxford magnet; room
temp. matrix shim system - 40 shims; JEOL Eclipse+500). Originally Z0 shim
was close to zero. Now (6 months later), it is almost 40,000 Hz. What is
the limit? What should we do when we approach it? Should we recharge the
cryoshims on the periodic basis? Do all 500 MHz magnets require recharging?
How often?
Thank you.
Alex
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Dr. Alex Kitaygorodskiy (Alex Kitt) Phone: 864-656-0611
Director, NMR Facility Fax: 864-656-6613
Chemistry Department kkitayg@clemson.edu
Clemson University
Clemson, SC 29634-1905
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