| Lines 5-6 were replaced by lines 5-7 |
| - risk of problems, especially at the beginning of an experiment. We therefore |
| - suggest to implement rules for this type of experiments. |
| + 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 been established: |
| Lines 8-15 were replaced by line 9 |
| - ''Restrictions concerning magnets and/or dilution refrigerator 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. |
| + ''Experiments with superconducting magnets and/or dilution refrigerator experiments'' |
| Lines 18-25 were replaced by lines 12-16 |
| - ''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 refrigerator |
| - can already be mounted on the instrument 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. |
| + ''Dilution refrigerator experiments'' |
| + * Sample changes must be done on working days |
| + * 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. |
| Lines 27-28 were replaced by line 18 |
| - sample must start before 8 a.m. Be aware that a delay of a working day |
| - may occur after a sample change. |
| + sample must start early in the morning. |
| Line 30 was replaced by lines 20-21 |
| - ''Dilution Scheduling Policy'' |
| + See also [Scheduling Policy for Superconducting Magnets and Dilution Refrigerators|MagnetDilutionSchedulingPolicy] (intended mainly for |
| + instrument responsibles) |
| Removed lines 32-49 |
| - Since we have 2 dilution sticks, the number of experiments with this type |
| - of equipment has raised severely. We suggest to implement a limit for |
| - dilution experiments: The total number of dilution days plus 3 times the |
| - number of experiments should not exceed 125 % of the available SINQ |
| - beam days. |
| - |
| - |Period | | Aug-Dez 2006 | Apr-Aug 2007 |
| - |SINQ beam days |s| 95 | 93 |
| - |number of dilution expts. |n| 15 | 17 |
| - |total dilution usage [[days] |d| 88 | 96 |
| - |dil1 & dil2 running simultaously [[days]| | 15 | 35 |
| - |points used/planned | p = n * 3 + d | 133 | 147 |
| - |points limit | l = s * 1.25 | 119 | 116 |
| - |overbooking factor | p / l * 100 %| 12 %| 27 % |
| - |
| - As the schedule for the next period is already done, we try to handle |
| - the large number of experiments as well as possible. But for the next |
| - cycle (Sept-Dec 2007) we want to agree about a scheduling policy. |
LIN