2020/10/17 (Saturday)
- Lab in-person: Michael
- Virtual partner: Matt
| Setup | Run 73. DIB 1/3/4 → Stripline 43/48/41 → pi-filters 1/2/3 → Cable 3/1/2 → nothing/nothing/accessory_interposer → HV_Conn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC55(1)-master; DCRC33(2) → HV control. DCRCs on. Lead/poly shield erected (4 lead walls, 2 poly walls). |
|---|---|
| 0800 | MB = 30.7% |
| 0915 | Tower = 58.7 mK |
| 0915 | Start a 60 min series at HV = 0V, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = set automatically to track temperature, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 8 Use sequence SimpleDataLoopNoFlash.msl \\Use QETbias_update.c, function sequence_update_QETbiases(62,30) |
| Tower stayed between 58.4 and 58.7 mK throughout series. But 48 minutes into series, Michael started looking at the other temperatures - this messed up the QET bias updater, so after that point the data will be bad because the QET biases will be too low or too high. |
| 1000 | Michael arrives in lab. Body temp 98.7 |
|---|---|
| 1005 | Tower/MC/Coldplate = 58.6/30.3/195 mK, Still = 1.5 K / 0.120 mbar / 0 mW, G1/G2= 238/229 mbar, 1K Pot = 1.62 K / 22±2 mbar. |
| 1035 | Begin LHe Transfer at MB = 26.8% |
| 1040 | Fill LN2 cold trap bath |
| 1114 | End LHe transfer @ MB = 89.9% |
| 1130 | MB = 90.0% |
| 1135 | Michael leaves lab |
| 1150 | Phonon channels look a little screwy |
| 1150 | Zap DCRC1&4 SQUIDs |
| 1540 | Tower wandering between 62 and 64 mK. Relock several phonon channels. After that looks like temperature is coming down. |
| 1610 | Tower = 59.9 mK and cooling |
| 1636 | Start a 60 min series at HV = +300V, drifting 0.0262 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = set automatically to track temperature, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 8 Use RootSequencer.c, function drift_sequence(300,0.0262) Use QETbias_update.c, function sequence_update_QETbiases(70,30) |
| 1636 | Vtest = 2.5 mV shortly after drift begins. Drift starts at 313.4 V according to RootSequencer. 0.32% HV loss. |
| Tower wandered between 59.9 and 60.5 mK during series. | |
| 1737 | Vtest = 2.9 V at end of drift. Final HV = +407.7 V according to RootSequencer. 0.28% HV loss. |
| 1937 | Start a 60 min series at HV = +100V, drifting 0.0274 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = set automatically to track temperature, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 8 Use RootSequencer.c, function drift_sequence(100,0.0274) Use QETbias_update.c, function sequence_update_QETbiases(70,30) |
| 1937 | Vtest = 0.8 mV shortly after drift begins. Drift starts at 107.8 V. 0.30% HV loss. |
| Tower wandered between 59.8 and 60.5 mK during series. | |
| 2038 | Vtest = 1.3 V at end of drift. Final HV = +205.4 V. 0.25% HV loss. |
| 2203 | Start a 60 min series at HV = +10V, drifting 0.0220 V/s, no prebias, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = set automatically to track temperature, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 8 Use RootSequencer.c, function drift_sequence(10,0.022,3600,0,0) Use QETbias_update.c, function sequence_update_QETbiases(62,30) |
| 2203 | Vtest = 0.2 mV shortly after drift begins. Drift starts at 11.0 V. 0.73% HV loss. |
| Tower wandered between 58.8 and 59.4 mK during series. | |
| 2304 | Vtest = 0.57 V at end of drift. Final HV = +90.2 V. 0.25% HV loss. |