Hi y'all,
We are considering the move of three magnex 400's (Varian/Agilent MR400's)
from a 5th floor to the basement of the same building. I am comparing costs
of purchasing a new magnet powersupply <$20k and doing it myself verses hiring
one of the well known and competent after market contractors in our niche.
There is clearly a monetary incentive to do it in house; there is also a
logistical incentive with respect to doing it completely on our own timeline
where delays of any kind cost nothing. While I have not soloed a magnet
installation, I have participated in several and I have (hopefully not
unjustified) a pretty high opinion of my technical/mechanical intuition.
Complications: I came to this lab recently and have been unable to find more
than one magnet installation document with amperes, polarity and shim currents.
So whoever does this will be guessing. The three magnets are in one room.
One of them definitely was charged with positive polarity, some ancient
memory tells me that perhaps the polarities were inverted between them to
mitigate cumulative interaction.... They were installed ~2011-2012 and
are positioned >10' from each other. The middle one is positive.
I searched our emails from the last four years for "magnet power supplies"
and found nothing useful. I am going to conclude that not many of us have
undertaken this job and those that might have are keeping it a secret. So
I am seriously considering buying a power supply and taking on this task.
What say my peers? I am curious. What distribution of encouragement and
condemnation will arise from your opinions.
If I get more than a handful of responses I will report my findings.
"Keep `em flying"
Scott
Scott K. Smith, Director of NMR Spectroscopy
The University of Texas at Austin | Chemistry | 832-294-1928 | utexas.edu
NMRlab homepage: IoNMR | Nuclear Magnetic Resonance Labs (utexas.edu)
https://ionmr.cm.utexas.edu/
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Received on Fri Feb 14 2025 - 10:36:51 MST