| Status | Turbo pumping IVC overnight. Still need to clean mixture. Still need to pump out main bath vacuum jacket. |
| 0750 | IVC = 120 e-6mbar pumping, 14 e-3mbar with pump valved out. These are about twice as high as last time. |
| 0805 | DIB2 electrical checkout looks good. Leakages to chassis are lower now that the IVC is under vacuum: QET and Qbias are around 0.5 nS, SQUID A around 0.6 nS. All others around 0.1 nS. Perhaps the leakages are humidity related. |
| 0815 | DIB1 electrical checkout looks good. Similarly leakages to chassis are lower now, previously 6 nS now more like 0.5 nS for QETs and Qbiases and SQUID C and Feedback C. All others around 0.1 nS. |
| 0825 | DIB3 electrical checkout looks good. Similarly leakages to chassis are lower now, previously 6 nS now more like 0.5 nS for QETs and Feedback B. All others around 0.1 nS. Confused that Q feedback/drain and feedback/source are <1 nS instead of typical 23 nS, but doesn't matter since there are no charge channels on DIB3. |
| 0855 | Remove clean tent from fridge area |
| 0910 | Finish retightening IVC bottom screws. |
| 0910 | IVC = 100 e-6mbar pumping, 12 e-3mbar with pump valved out. |
| 0915 | Start pumping IVC with leak detector. Initial leak about 50 pbarL/s but settling downward |
| 0920 | Leak detector = 10 pbarL/s |
| 0940 | Leak detector = 9.2 pbarL/s and steady |
| 1000 | Leak checked all connections. No leaks found. Leak rate smoothly rose to 10 pbarL/s over 20 mins. |
| 1132 | Turn on 3He pump, commence pumping fridge lines to dump. Open v9, G2 stabilizes at 772 mbar. Isolate P1 = 2.6 mbar. Open v1, v5, v6 and gate valve. |
| 1309 | P1 = 16 ubar, G2=782 mbar. Isolate fridge lines, close all IGH valves, turn off 3He pump. |
| 1345 | Pump out Main Bath. |
| 1350 | IVC pressure at 8.6E-5mbar. Switch over to pumping with leak checker in preparation for flushing Main Bath with He gas. |
| 1400 | Background leak rate at 9.6E-9 mbarL/s. Begin flushing Main Bath with He gas. After flushing, background leak rate at 1E-8 mbarL/s. |
| 1410 | Fill IVC with 5.4mbar of He gas. |
| 1420 | Isolate IVC and remove bellows from pumping manifold. Attach far end of bellows to Dewar Jacket manifold and commence pumping out Dewar Jacket. |
| 1428 | Valve to dewar jacket opened fully. External pressure sensor kept below 1E-2 mbar. |
| 1435 | Pumped out Trap 2, had about 5 mbar left in it from last night. Put both LN2 traps in bath and fill bath. |
| 1440 | Main bath Dewar jacket = 2.5e-3 mbar pumping, 1.0e-1 mbar with pump valved out |
| 1502 | Commence LN2 transfer. |
| 1545 | MC(Cernox) = 210 K. Main bath Dewar jacket = 3.4e-6 mbar pumping, 4.0 e-5 mbar with pump valved out. Big drop after LN transfer began, must have been mostly air in there. |
| 1555 | Begin cryocleaning mixture through Trap 2. V6 open to 12.8%. 15min later it looks like flow is low, increase V6 to 12.9%. |
| 1605 | MC(Cernox) = 170 K, Sorb = 180 K. Main bath Dewar jacket = 2.5e-6 mbar pumping |
| 1620 | MC(Cernox) = 155 K, Sorb = 154 K. Main bath Dewar jacket = 2.2e-6 mbar pumping |
| 1621 | MC(Cernox) = 152 K, Sorb = 150 K. Main bath Dewar jacket = 2.2E-6 mbar pumping. LN2 resistor measurement reads 1.34kOhm. Cease LN2 transfer. |
| 1650 | MC(Cernox) = 129 K, Sorb = 126 K. Main bath Dewar Jacket = 3.4E-6 mbar pumping. Cease cryocleaning. Pump mixture to dump. |
| 1720 | Cease pumping to dump. G2 has reached 785mbar. Isolate dump and turn off He3 pump. |