Hello Spinlanders,
I wanted to please ask your experiences and thoughts regarding keeping magnets at field during a 5-month building closure.
During the closure, all the building utilities will be renovated and we will have no electricity, ventilation/AC, or compressed air. As to vibrations, I expect drilling through concrete but no major structural demolitions. Our NMR lab (unshielded 400, shielded 500 and 600, all Bruker) is on the third floor.
The project team is leaning towards keeping the magnets at field. We’d have weekly access for cryogen fills. The magnets would be fenced off at their 5 Gauss lines and covered with plastic to protect from dust.
I am still unsure of the following:
- Outdoor temperatures range from 32C/90F to 15C/60F and the humidity ranges from 60-90%. Without ventilation/AC I expect our lab to be quite warm and humid. Aside from increased nitrogen boil-off, is there anything else I should expect?
- Is it safer to keep the magnet legs ‘up’ using compressed air cylinders, or keep them down?
- The stray field plot for our 400 indicates ~35 Gauss for ceiling of the second floor (i.e. below the magnet). Any horror stories on work done on the ceiling below a magnet?
- Has anyone used a Bruker Zurich magnet with a standalone helium sensor like the Magnex E5011? Our SLCB-based sensors won’t have power.
- Any other “X” factors that I haven’t foreseen?!
Many thanks,
Sameer
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Sameer Al-Abdul-Wahid, Ph.D.
Manager, Nuclear Magnetic Resonance Centre
University of Guelph
50 Stone Road East, Guelph, ON N1G 2W1
Tel: 519-824-4120 x58914<tel:519-824-4120%20x58914>
Web: http://nmr.uoguelph.ca/
Received on Mon Nov 14 2016 - 06:36:43 MST