Hi,
Thanks in advance for all input!
I have a 400 MHz Bruker Avance with a 400 MHz ultra-shielded Magnex (JMT) magnet built in 2000. The magnet quenched a couple times when originally installed but came up to field and has been stable ever since. The magnet has not been serviced in the last 12 years (no reconditioning/no seals replaced/never bought down for fear that it would not come to field again). The magnet is also rusting around the nitrogen and helium ports - where they are connected into the can and the paint is cracking on the whole top of the can with some tiny spider-like rust patterns. I had the service contract written to cover the magnet as well as hardware but Bruker has not offerred any solution(s) to the rust issue.
The console is original, too. About 1/3 of the boards have been replaced over time but I am only runing TOPSPIN 2.1 and can't upgrade beyond this because of hardware incompatibility.
My division is moving sites and it has been suggested by management that the NMR should be moved from one side of the Bay to the other. There is no back-up NMR in the Bay area.
Here is my question to the group:
What are the odds of the magnet coming back to field, given that it is a Magnex magnet?
What do you think is a reasonable estimate of down-time for the best case scenerio and the worst case scenerio?
How should I assess whether the rust will decrease the life expectancy of the magnet?
Can a Magnex magnet be fitted with a nitrogen recycler and how does that affect S/N?
Does it seem cost effective to stick with an old magnet or should I be looking at one of the helium-only magnets that would lower cryogen costs across the board as well as conserve helium?
I apologize if these questions have been addressed in previous AMMRL posts and I will summarize and post answers here.
Thank you so much for your insights!
Please respond to:
Mary Frances (MF) Leopold
mary.leopold_at_lifetech.com
Life Technologies
Received on Mon Jul 02 2012 - 11:50:43 MST