2010/12/12
The computer constantly reboots itself. Don't know why. This may have to do with the Labview program. The follow is the error message right after logging in.
| 1708 | Fill N2 cold trap full. The cryoleaning has been running during the weekend. Liquid N2 was gone at some point. |
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| 1717 | Pump the bath and fill it with He gas. The spike in leak signal is still there. It went up to 3.3E-7cc/s in 20s and dropped to 9.3E-9cc/s in 5min |
| 1732 | Hook leak checker to the main bath and pump it down |
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| 1740 | P2 of leak checker starts to drop from 1006mbar |
| 1746 | Leak checker P2=0.7mbar, leak=1.1cc/s. Disable twin flow high in the leak checker to stop it from switching back and forth. Leave it on twin flow low for a while. |
<note important> When leak checking a large volume with high He background:
- Disable “Twin Flow High” in leak checker
- Pump He signal below 1E-2cc/s
- At this point you may be able to enable “Twin Flow High” to continue the leak check (this step not tested yet!)
</note>
| 2126 | Pump the bath using both the pumping station and the leak checker. Pumping station is in standby mode. Leak checker is in “Twin Flow High” mode. P2 of leak checker 2.7E-2mbar, leak rate=6.7E-2cc/s |
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