2013/03/17
| 1018 | Fed Cricket 4 pellets. |
|---|---|
| 1010 | Filled LN2 cold trap. |
| 1121 | G2 still increasing at a rate of 0.13 mbar/ minute. |
| 1155 | Opened V12B. That caused the temperature to start increasing. G1 rose a little bit. However, most notable is that G2 stopped it's constant increase of 0.13 mbar / min. Does this mean there might be a leak in V12B as well? |
| 1251 | G1 = 1.2 mbar; G2 = 750 mbar. |
| Closed Gate and Condenser valve; Closed V6. | |
| 1320 | Closed all valves on IGH. Pulled out cold traps and begin pumping on them via He-pump and V2A, 5A, 7, 2, 1, 11A and 11B. |
| 1520 | Isolated cold traps, shut manual valves on dump and isolated pump. Opened line from cold trap 1 to atmosphere, causing G1 to jump to 1000mbar (this should not have happened since V12A was closed). Installed speedivalue to back of IGH from cold trap 1. Test 1: With new speedivalve closed, opened He4 pump to V7, 11A, P2 increased to 16mbar. G1 didn't change. This suggests that the new speedivalve is working properly. Test 2: Pumped on cold trap 1 line via V2 and V7. Test 3: Once G1 at ~0mbar, opened V12B but saw no change in G1, suggesting that V12B is not leaky since nothing entered cold trap 2 via V12B while the line from cold trap 1 was open to atmosphere. |
| 1638 | Began cleaning the mixture. |
| 1715 | V6 at 13.8%. Mixture seems to be cleaning now. Will clean for two hours. |
| 1900 | Cleaning stalled. Had to increase V6 to 14.2%. |
| 2015 | Pumped mixture to the dump. Dump pressure seems to be ~ 739 mbar, so it seems the cleaning helped a bit. |
| 2039 | G1 ~ 0.6 mbar, G2 ~ 739 mbar. Close valves on IGH. Pull out N2 cold traps. |
| 2341 | Cleaned cold traps. |
| Fed Cricket 4 pellets. |