2020/10/14 (Wednesday)
- Lab in-person: Ruiren
- 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). |
|---|---|
| 1000 | Problem with Remote Desktop connection to fridge computer. Doesn't accept keyboard entries. That's true from multiple peoples' home computers, although my iPad partially works. |
| 1025 | MB = 68.0% |
| 1040 | Tower = 59.8 mK. Was bouncing between 60.8 and 61.8, now cooling. Maybe it's cooling because I relocked some QETs. |
| 1040 | Ruiren body temperature = 36.7 C |
| 1109 | Tower/MC/Coldplate = 60.4/31.1/196 mK, Still = 1.50 K / 0.130 mbar / 0 mW, G1/G2= 237/238 mbar, 1K Pot = 1.63 K / 22±2 mbar. |
| 1118 | Fill LN2 cold trap bath |
| 1135 | The keyboard of the fridge computer seems not working, after rebooting the fridge computer the keyboard is functioning again. |
| Fridge computer keyboard is now also working through Remote Desktop. | |
| 1139 | Ruiren leaves lab |
| 1145 | Tower = 85.8 mK, cooling down from 190 mK after Ruiren restarted the vi. No idea how high it went or what caused the warming. |
| 1220 | Tower = 67.5 mK and cooling |
| 1225 | Having trouble now locking SQUIDs. Let's zap. |
| 1225 | Zap DCRC1&4 SQUIDs. |
| 1255 | Tower = 64.8 mK and cooling |
| 1300 | Still having trouble with phonon channels. Stop and restart DAQ programs. |
| 1300 | Zap DCRC1&4 SQUIDs. |
| 1325 | Tower = 63.3 mK and cooling fast (5 mK/hour). Phonon channels look OK. |
| 1530 | Tower = 59.5 mK. Was swinging between 59.6 and 60.8 |
| 1530 | Tower = 59.4 mK, QET biases = (0, 255, 310, 0)/(0, 335, 325, 350)uA |
| 1530 | Start a 60 min series at HV = 0V, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = see above&below, 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 |
| 1534 | Tower = 59.2 mK, QET biases = (0, 255, 315, 0)/(0, 335, 330, 350)uA |
| 1540 | Tower = 59.0 mK, QET biases = (0, 260, 315, 0)/(0, 335, 330, 355)uA |
| 1551 | Tower = 58.8 mK, QET biases = (0, 260, 315, 0)/(0, 335, 335, 355)uA |
| 1617 | Tower = 59.0 mK, QET biases = (0, 260, 315, 0)/(0, 335, 330, 355)uA |
| 1622 | Tower = 59.3 mK, QET biases = (0, 255, 310, 0)/(0, 335, 325, 350)uA |
| series ends | |
| 1652 | Tower = 59.3 mK, QET biases = (0, 255, 310, 0)/(0, 335, 325, 350)uA |
| 1653 | 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 = see above&below, 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) |
| 1653 | Vtest = 4.5 mV shortly after drift begins. Rootsequencer says drift starts at 313.4 V. 0.57% HV loss. |
| 1656 | Tower = 59.1 mK, QET biases = (0, 255, 315, 0)/(0, 335, 330, 355)uA |
| 1722 | Tower = 59.5 mK, QET biases = (0, 255, 310, 0)/(0, 335, 325, 350)uA |
| 1725 | Tower = 59.7 mK, QET biases = (0, 255, 310, 0)/(0, 330, 325, 345)uA |
| 1728 | Tower = 59.9 mK, QET biases = (0, 255, 305, 0)/(0, 330, 320, 345)uA |
| 1730 | Tower = 60.1 mK, QET biases = (0, 250, 305, 0)/(0, 330, 320, 345)uA |
| 1732 | Tower = 59.9 mK, QET biases = (0, 255, 305, 0)/(0, 330, 320, 345)uA |
| 1738 | Tower = 59.7 mK, QET biases = (0, 255, 310, 0)/(0, 330, 325, 345)uA |
| 1745 | Tower = 59.4 mK, QET biases = (0, 255, 310, 0)/(0, 335, 325, 350)uA |
| 1754 | Vtest = 4.8 V at end of drift. HV = +407.7 V according to RootSequencer. 0.47% HV loss. |
| 1940 | Tower = 59.3 mK, QET biases = (0, 255, 310, 0)/(0, 335, 325, 350)uA |
| 1942 | 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 = (0,180,210,0)/(0,275,230,275)uA, 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) |
| 1942 | Vtest = 1.3 mV shortly after drift begins. Drift appears to start at 105.9 V. 0.49% HV loss |
| 1948 | Tower = 59.1 mK, QET biases = (0, 255, 315, 0)/(0, 335, 330, 355)uA |
| 2024 | Tower = 58.9 mK, QET biases = (0, 260, 315, 0)/(0, 335, 330, 355)uA |
| 2043 | Drift ends, no apparent lag. Vtest = 2.1 mV. HV at end of drift looks like 204.0 V, indicating 0.41% HV loss |