2017/03/20 (Monday)
| 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 | |
| 0915 | Tower = 33.2 mK, Main bath = 39.4% |
| 0920 | Fill LN2 cold trap bath. |
| 1013 | Tower/MC/Coldplate = 33.1/30.6/184 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 260/235 mbar, 1K Pot = 1.694 K / 28 mbar, Main bath = 37.9%. Boil off rate: faster than slow mode (predicted level: 40.1%). |
| 1155 | Adjust trace lengths in ODB for DCRC1, DCRC2 to 26.2144ms (ChargeWaveFormLength = 131072, PhononWaveFormLength = 65536) |
| 1201 | Set HV = 60 V |
| 1203 | Adjust DCRC2 PC driver offset from 0.04 to 0.25 |
| Channel | Driver Offset |
|---|---|
| DCRC1 PA | -1.35 |
| DCRC1 PB | -0.5 |
| DCRC1 PC | -0.25 |
| DCRC2 PC | 0.25 |
| DCRC2 PD | -0.05 |
| 1206 | |
|---|---|
| 1207 | HV = 60V, V_leak = 5.7 mV, V_crystal = 57.5 V |
| 1208 | Stop, data taking, need to set QET biases to the same values used for 0V noise studies last week. |
| 1211 | Start 30 min 60V HV transition long trace random data set with 26.2144ms trace length, Frontend Gain = (20/20/15)/(-/4/3), OG = 4/2, QET biases=table here ,20Hz in-run randoms with no starting/ending randoms. |
| 1215 | HV = 60V, V_leak = 3.2 mV, V_crystal = 58.6 V |
| 1152 | Recovery meter counter clicks over from 0183 to 0184 x100cuft. 11:52 is actually a guess, it may have been 11:46, or possibly 11:40. So we may be off by 2 or 4 cuft. Meter rate since 9:16 this morning has averaged 0.307 cuft/min. |
| 1325 | Ground and flash detector. |
| 1406 | When we started to take noise data last week, the gains were: Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2. These weren't changed back properly for both the 1459 series on friday, and the 1211 series today. Set them properly now and re-take those series before moving on. |
|---|---|
| 1414 | Start 30 min 0V HV transition long trace random data set with 26.2144ms trace length, Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2, QET biases=table here, 20Hz in-run randoms with no starting/ending randoms. |
| 1434 | Start LHe transfer @ MB = 31.2% |
| 1527 | End LHe transfer @ MB = 92.7% Used 2.0 PSI pressure during transfer, with 250L Dewar less than half full. Recovery meter rate was 7.5 cuft/min during transfer. |
| 1544 | Set HV = 60 V |
| 1546 | Change DCRC2 Driver offsets. |
| Channel | Driver Offset |
|---|---|
| DCRC1 PA | -1.35 |
| DCRC1 PB | -0.5 |
| DCRC1 PC | -0.25 |
| DCRC2 PC | 1.07 |
| DCRC2 PD | 0.175 |
| 1549 | Start 30 min 60V HV transition long trace random data set with 26.2144ms trace length, Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2, QET biases=table here, 20Hz in-run randoms with no starting/ending randoms. |
|---|---|
| 1550 | HV = 60V, V_leak = 4.9 mV, V_crystal = 57.8 V |
| 1630 | Ground and flash detector. MIDAS tools flash&flash seems to not be working, flashed using testflash.msl sequence. A JIRA post describing the problem has been created. |
| 1708 | Set HV = 60 V |
| 1712 | Send all channels normal (QET bias=+/- 300uA). Adjust Driver Offsets. |
| Channel | Driver Offset |
|---|---|
| DCRC1 PA | -1.8 |
| DCRC1 PB | -1.0 |
| DCRC1 PC | -0.8 |
| DCRC2 PC | 1.3 |
| DCRC2 PD | 0.0 |
| 1713 | Start 30 min 60V HV normal long trace random data set with 26.2144ms trace length, Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2, QET biases=(300/300/300)/(-,-300,-300), 20Hz in-run randoms with no starting/ending randoms. |
|---|---|
| 1715 | HV = 60V, V_leak = 3.2 mV, V_crystal = 58.6 V |
| 1757 | Ground and flash detector |
| 1801 | Fill LN2 cold trap full. |