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Rules concerning Superconducting Magnets and Dilution Refrigerator Experiments
Experiments involving superconducting magnets and/or dilution refrigerators
are labor-intensive for the sample environment staff and imply a quite high
risk of problems, especially at the beginning of an experiment. In the evening
and on weekends, there is only very limited technical support. In order to
minimize beam time losses, some rules have to be established:
Experiments with superconducting magnets and/or dilution refrigerator experiments
- The experiments must start on a working day, early in the morning.
- Aligning the sample with neutrons must be done before the starting day.
Dilution refrigerator experiments
- Sample changes must be planned on working days
- Experiments should whenever possible not start on Fridays or at a day
before a holiday. If a beam block begins at such a day, the mounting and
cooldown of the dilution refrigerator should be planned for the day before.
- Dilution experiments should whenever possible start at the beginning of
a beam block. However, several succesive experiments with the same
cryomagnet/cryostat combination are also desirable.
- The sample must in general be ready (put on/into a suitable holder) in the
morning of a workday before starting the experiment, except when the stick
is already used immediately before. Please contact the sample environment
staff before booking the travel in order to agree about the latest time
possible for putting the sample into the dilution stick.
- Sample changes take a full working day, i.e. the warming up of the old
sample must start early in the morning.
- The number of dilution refrigerator experiments is limited. Experiments
during internal beam time have to be approved by Joël Mesot (scientific
relevance for LNS) and by Markus Zolliker (availability).
This particular version was published on 07-Mar-2007 10:41:16 UTC by MarkusZolliker.
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