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Jamie and Steve
We closed ITMX and ITMY chambers and started pumping around 11am
What we did before:
1, turned off AC power to PZT Jena HV ps
2, checked jam nut positions
3, cheched single o-ring shims
4, closed psl out shutter
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We are at 30 Torr of 7 hours of pumping with 2 roughing pumps.
Kiwamu will take over the rest of the roughing today. He will keep an eye on the pumping speed to be ~1-2 Torr/min and open up the manual RV1 valve if needed.
The present status is #3023 of "chamber open to vacuum open" mode and waiting the P1 pressure to drop to 500 mTorr
He will do the following to stop pumping at P1 = 500 mTorr
1, close V3
2, close RV1 with torque wheel
3, turn off PR1 & 3
4, disconnect metal hose between RV1 and PR3
I will start the Maglev tomorrow morning. |