2013/03/28
| 1015 | Fed Cricket 4 pellets. |
|---|---|
| 1035 | Open leak checker to vent valve. Internal leak rate settled to 4.5E-10 mbar*l/s. |
| Shut off V2A and V5A; opened vent valve. Leak rate settled to 3.8E-7 mbar*l/s. | |
| 1105 | Begin spray test in IGH. Background was 3.76E-7 mbar*l/s. |
| First test with syringe showed no increase in leak rate (background decreased by 0.05E-7 mbar*l/s). | |
| 1120 | Apparently the syringe was plugged with something and He gas wasn't flowing out. |
| Spray tested IGH again (from the Little Blue side) - no gross leak detected. | |
| Spray tested IGH from (K100 side) - no gross leak detected. | |
| 1140 | Now spraying liberally without syringe on valves clustered on Little Blue side. Background: 3.71E-7 mbar*l/s. |
| Right side of V12A (from cold trap 1), leak rate rose to 4E-7 mbar*l/s. The left side of V12A was tested prior to that and didn't seem to show an increase of the leak rate. | |
| 1215 | Let leak rate settle down to 3.66E-7 mbar*l/s. After inserting syringe into area on the right side of 12A resulted in a maximum leak rate of 4.22E-7 mbar*l/s, though at one point during this test the syringe fell off result in a quick spray that might have affected this test. With a new background rate of 3.74E-7 mbar*l/s this test was repeated with left side of V12A. The leak rate increased to 4.04E-7 mbar*l/s before the He was stopped within 3-4 minutes. The leak rate maxed out at 4.13E-7 mbar*l/s. |
| 1336 | With a background rate of 3.782E-7 mbar*l/s, and a possible rip in plastic fixed, the right side was again tested. After over 4 minutes the leak rate reached a maximum value of 3.90 (+/-0.01) mbar*l/s. With the leak rate at 3.87E-7 mbar*l/s and dropping, the left side was tested again. The leak rate reached a min of 3.85E-7 mbar*l/s before increasing. After 6 minutes the leak rate was at 4.15E-7 mbar*l/s. The gas was stopped after 7 minutes with the leak rate at 4.25E-7 mbar*l/s. The leak rate reached a maximum of 4.33E-7 mbar*l/s after 9.5 minutes. |
| 1416 | To repeat the last test we waited until the leak rate was at 3.87E-7 mbar*l/s and dropping, and then tested the right hand side. The leak rate reached a min of 3.85E-7 and began increasing. After 6 minutes the leak rate was at 3.97E-7 mbar*l/s, and at 7 minutes the gas was stopped with a leak rate of 4.01E-7 mbar*l/s. The leak rate reached a maximum of 4.07E-7 mbar*l/s after 9.7 minutes. |
| 1810 | Fed Cricket 4 pellets. |
