2017/04/06 (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 | |
| 0905 | Tower/MC/Coldplate = 33.6/31.1/193 mK, Still = 1.3 K / 0.120 mbar, G1/G2 = 245/220 mbar, 1K Pot = 1.682 K / 28 mbar, Main bath = 36.0%. Boil off rate: faster than slow mode (predicted level: 39.8%) |
| 0910 | Fill LN2 cold trap bath |
| 1347 | Start LHe transfer @ main bath = 29.0% |
| 1450 | Finish LHe transfer @ main bath = 91.5% |
| New standard QET biases from most recent IbIs measurements: | |||
|---|---|---|---|
| channel | QET bias | prefactor | QETbias*prefactor |
| DCRC1pA/DIB1pA/Side1pE | 132.7 | 0.301 | 40 |
| DCRC1pB/DIB1pB/Side1pB | 145.3 | 0.275 | 40 |
| DCRC1pC/DIB1pC/Side1pD | 130.4 | 0.302 | 40 |
| DCRC2pC/DIB4pC/Side1pC | -152.8 | 0.234 | 40 |
| DCRC2pD/DIB4pD/Side1pF | -151.7 | 0.264 | 40 |
| 1655 | Dial HV up to 20.0 V |
|---|---|
| 1705 | HV = 20.00 V, Vtest = 1.2 mV → Vdetector = 19.5 V |
| 1708 | Start sequence of 16, 1-hour data series of 1-sided 20V HV data with Frontend Gain = (20/20/20)/(-/4/4), OG = 4/2, QET biases = table above, with 1000 beginning randoms, no flashing, and a 15ADC bin threshold trigger on DCRC1 pA |
| 1720 | HV = 20.00 V, Vtest = 0.6 mV → Vdetector = 19.7 V |
| time | Main bath | recovery rate (cuft/min) |
|---|---|---|
| no Dewar on recovery | ||
| 9:05 | 36.0% | 0.228 |
| 9:30 | 35.4% | 0.253 |
| 9:55 | 34.9% | 0.213 |
| 11:05 | 33.0% | 0.231 |
| 12:30 | 30.8% | 0.168 |
| 13:10 | 29.6% | 0.196 |
| after transfer. Dewar on recovery | ||
| 15:05 | 91.5% | 0.447 |
| 15:20 | 91.5% | 0.188 |
| 15:55 | 91.2% | 0.234 |
| 16:45 | 90.8% | 0.179 |
| 17:10 | 90.5% | 0.159 |
| 17:44 | 90.0% | |
| 17:55 | 0.156 | |
| 1739 | Fill LN2 cold trap bath. |
|---|---|
| 1747 | Start taking 1 photo every 10 seconds of He recovery meter. |