2017/03/09 (Thursday)
| Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 | |
| 0913 | Tower/MC/Coldplate = 33.6/31.0/189 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 258/231 mbar, 1K Pot = 1.691 K / 28 mbar, Main bath = 34.0%. Boil off rate: faster than slow mode (predicted level: 36.9%). |
| 0926 | Fill LN2 cold trap bath |
| 1121 | Flash detector for 30s. |
| 1153 | Tower temp = 33.8 mK. |
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| 1156 | Abort data taking, DIB2 PC railed. |
| 1158 | Start 30 min 0V HV long trace random data set with 26.2144ms trace length, 20Hz in-run randoms with no starting/ending randoms. Observe baseline while data is taking. |
| Crystal = 0 V | |
|---|---|
| Channel | Baseline (V) |
| DIB1 PA | -0.7208 |
| DIB1 PB | -0.6364 |
| DIB1 PC | -0.4585 |
| DIB2 PC | -0.7732 |
| DIB2 PD | -0.7409 |
| 1315 | Flash detector for 30s. |
|---|---|
| 1320 | Start LHe transfer (MB = 27.5%) |
| 1426 | Finish LHe transfer (MB = 92.2%) |
| 1254 | Tower temp = 33.2mK |
| 1256 | Relocked SQUIDs on DCRC2 PC. DCRC1 PA remained railed after re-lock, changed driver offset from -0.15 to 0.1 |
| Crystal = 0 V | |
|---|---|
| Channel | Baseline (V) |
| DIB1 PA | -0.2699 |
| DIB1 PB | -0.635 |
| DIB1 PC | -0.5127 |
| DIB2 PC | -0.8348 |
| DIB2 PD | -0.7809 |
| 1503 | Set HV = 30V |
|---|---|
| 1504 | DCRC2 PC, PD are railed. Re-locking SQUIDs returns them. |
| 1508 | Start 30 min 30V HV long trace random data set with 26.2144ms trace length, 20Hz in-run randoms with no starting/ending randoms. Observe baseline while data is taking. |
| 1510 | HV = 30 V, V_leak=1.8 mV, V_crystal = 29.2 V |
| Crystal = 29.2 V | |
|---|---|
| Channel | Baseline (V) |
| DIB1 PA | -0.3013 |
| DIB1 PB | -0.6014 |
| DIB1 PC | -0.4577 |
| DIB2 PC | -0.7819 |
| DIB2 PD | -0.7413 |
| 1550 | HV = 30 V, V_leak=1.0 mV, V_crystal = 29.6 V |
|---|---|
| 1552 | Looks like the MIDAS browser crashed. SQUID tuning gui is still working and indicates that the run is still going. |
| 1556 | Use “kill_daq_umn” and “start_daq_umn” to restart. When MIDAS started up again, the run and sequencer were still going, but the sequencer immediately continued to the “TRANSITION STOP” line and ended the run apparently smoothly? |
| 1559 | Ground and flash detector |
| 1731 | Fill LN2 cold trap. |