Scheduling Policy of 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. We therefore suggest to implement rules for this type of experiments. Restrictions concerning magnets and/or dilution refirgerator experiments

• On weekends or holidays, is not possible to start magnet or dilution refrigerator experiments
• Support during weekend or in the evening may not be provided (there is no sample environment stand-by). If problems occur, it should be tried to contact the sample environment staff, but not during the night (10 p.m. - 8 a.m.). In the case that the contact can not be established, the experiment might have to be suspended until the next working day.
• Aligning the sample with neutrons must be done before the starting day.

Restrictions concerning dilution refrigerator experiments

• On weekends or holidays, sample changes are not possible
• Experiments starting on Fridays (or at a day before a holiday) are only allowed at the beginning of a beam block, i.e. when the sample can already be mounted the day before.
• The sample must be ready a workday before starting the experiment, except for the case where the stick is already used immediately before. In this case the rules for sample changes apply.
• Sample changes take a full working day, i.e. the warming up of the old sample must start before 8 a.m. Be aware that a delay of a working day may occur after a sample change.