| Line 3 was replaced by line 3 |
| - * pump the traps (heat out each for 30 min, but pump longer. |
| + * pump the traps (heat out each for 30 min, but pump longer) |
| Line 5 was replaced by line 5 |
| - system ''and'' on the stick (all voulmes might be connected) |
| + system ''and'' on the stick (all volumes might be connected) |
| Lines 9-10 were replaced by line 9 |
| - * make the seal with clean fingers (a thick layer on the stick |
| - only a small amount onside the aluminium tube. |
| + * make the CAF seal (red silicon paste) with clean fingers |
| Lines 14-17 were replaced by lines 13-26 |
| - * put into LN2 for precooling, put a small amount of He (1 mbar or |
| - less) into the IVC. |
| - * if there is no hurry, the stick might be put directly into |
| - the cryostat. |
| + * put the stick into the Variox or magnet VTI. |
| + * insert about 50 mbar 4He into the IVC |
| + * take the special assembly to connect the pumping |
| + line and the condenser line with the stick |
| + * pump out the adapter piece |
| + * connect a turbo pump to the IVC, start te pump, but do not yet open the IVC valve. |
| + |
| + The following steps can be done automatically in SEA, under "main diltuion control" |
| + |
| + * ("cool") cool down the heat exchanger of the variox or magnet |
| + * When the stick is cold (< 4K, ins SEA "readyforpump") pump the IVC by clicking on "sorbpump" and opening |
| + the IVC valve, which is already connected to a running turbo pump. |
| + This heats up the VTI to 5 K, which might take a while. After 20 min. with sorb temperature set to 40 K, |
| + then 15 min without sorb heater, the "condense" step starts automatically. |
| Removed lines 19-24 |
| - ... |
| - |
| - !Warming up |
| - |
| - * before removing from the cryostat, it might be a good idea to have |
| - some underpressure in the IVC. |
LIN