| | Setup: DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer 3/?/2 → HVConn 1/3/2 → HV 1/2 → DCRC55(1)/DCRC50(3) |
| | overnight: DCRCs powered, 100V bias on detector |
| 0855 | Tower/MC/Coldplate = 38.4/32.2/181 mK, Still = 1.44 K / 0.110 mbar, G1/G2 = 153/146 mbar, 1K Pot = 1.52±0.01 K / 6.5±0.5 mbar. MB = 38.0% |
| 0855 | Vbias/Vtest/Vdet = 105.60/14.3/99.9 V |
| 0900 | Dial HV down to 0V |
| 1025 | Fill LN2 cold trap bath |
| | most of yesterday's 100V IbIs look ok but DCRC3pC looks like it needs its SQUID zapped. |
| 1155 | Dial HV up to 115V for prebias, then dial back to target Vdetector = 100 |
| 1210 | Vbias/Vtest/Vdet = 106.14/15.7/99.9 V |
| 1215 | Zap SQUIDs |
| 1256 | Start IbIs sequence on DCRC3pC, from 450 to 200 step -2 uA, HV = 100 V, front-end gain 10, driver gain 1. |
| 1255 | Vbias/Vtest/Vdet = 106.14/14.2/100.5 V |
| 1418 | Start LHe transfer (MB = 30.2%) |
| 1512 | End LHe transfer (MB = 88.3%) |
| 1525 | Dial HV down to near 0V and ground. |
| 1531 | Begin 1 min flashing sequence. Tower temperature peaks at 350 mK. |
| | Took about 25 minutes to cool to within 1 mK of base |
| 1625 | Chose operating points for QET biases from the 100V IbIs data: |