2012/04/19
| 1500 | Fill N2 cold trap full. |
|---|---|
| 1620 | Conduct spray test. Background helium leak rate 2E-9 mbar l/s. Helium leak rate jumped to 5E-7 mbar l/s when spray testing bottom flange. Leak is repeatable: not a phantom. Area marked with tape for further examination. |