2011/09/09
| 1525 | Perform leak check. Background helium leak rate 1.3E-8 mbar l/s. Did not increase during spray test, so no gross leak found. |
|---|---|
| 1530 | Raise dewar. |
| 1704 | Dewar is pumped out. IVC He 7.4e-9cc/s. |
| 1712 | Set He gas pressure to 3psig. |
| 1722 | Start transfer liquid N2. IVC He jumped to 8.3e-9cc/s after filling in He gas in to bath. |
| 1723 | Fill IVC with 4.6mbar N2 exchange gas. |
| 2017 | Filled N2 cold trap. |
| 2026 | Cryoclean mixture at V6=13.9%. |