2020/08/27 (Thursday)
- Lab in-person: Zach
- Virtual partner: Nick (through slack)
| 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 overnight. Lead/poly shield erected (4 lead walls, 2 poly walls). |
|---|---|
| 0755 | MB = 67.5% |
| 0853 | Tower = 53.7 mK |
| 0853 | Start a 60 min series 0V, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (0,320,370,0)/(0,360,420,410)uA, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 12 Use sequence SimpleDataLoopNoFlash.msl |
| 1031 | Tower = 53.8 mK |
| 1039 | Start a 15 min series at HV = -100V, drifting 0.0573 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (0,320,370,0)/(0,360,420,410)uA, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 12 Use sequence HVdrift_neg100V_pre15_2min_57p3mVps_multiloop10_15min.msl |
| 1039 | Vtest = -7.8 mV shortly after drift begins. Drift appears to start at -106.0 V. 2.9% HV loss. |
| 1056 | Vtest = -11.1 mV, HV = -157.4 V, drift ends. 2.8% HV loss. Lag ratio = 1.1ish. |
| 1056 | Tower = 53.7 mK |
| 1300 | Realized many of the channels were railed in the two previous datasets, fixing this. |
| 1304 | DCRC4 pB seems to be railed, struggling to get it back to a functioning state. Going to try and zap the squids. |
| 1308 | Zap finishes, Tower = 61.1 mK. |
| 1350 | Zach body temp = 99.1 |
|---|---|
| 1355 | MB = 56.5% |
| 1412 | Zach arrives at lab. |
| 1415 | Tower/MC/Coldplate = 49.1/29.9/172 mK, Still = 1.15 K / 0.095 mbar / 0 mW, G1/G2= 206/216 mbar, 1K Pot = 1.70 K / 55±5 mbar. (Note: squids were flashed about 30min prior, the fridge cooled further as a result.) |
| 1425 | Set up nitrogen gas cylinder to be purging the ebox. |
| 1430 | Filled LN2 cold trap dewar. |
| 1440 | Send LN2 dewar to be filled. |
| 1443 | Zach leaves lab. |
| 1525 | Zach body temp = 98.2 |
| 1615 | Tower = 49.0 mK |
|---|---|
| 1615 | Start a 60 min series 0V, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (0,320,370,0)/(0,360,420,410)uA, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 12 Use sequence SimpleDataLoopNoFlash.msl |
| 1743 | Tower = 48.9 mK |
| 1751 | Start a 15 min series at HV = -100V, drifting 0.0473 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (0,320,370,0)/(0,360,420,410)uA, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 12 Use sequence HVdrift_neg100V_pre15_2min_47p3mVps_multiloop10_15min.msl |
| 1751 | Vtest = -6.8 mV shortly after drift begins. Drift appears to start at -104.8 V. 2.6% HV loss. |
| 1808 | Vtest = -9.5 mV, HV = -147.3 V, drift ends. 2.6% HV loss. Lag ratio = 1.1ish. |
| 1808 | Tower = 48.9 mK |
| 1948 | Tower = 49.1 mK |
| 1954 | Start a 15 min series at HV = -100V, drifting 0.0301 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (0,320,370,0)/(0,360,420,410)uA, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 12 Use sequence HVdrift_neg100V_pre15_2min_30p1mVps_multiloop10_15min.msl |
| 1954 | Vtest = -6.5 mV shortly after drift begins. Drift appears to start at -102.7 V. 2.5% HV loss. |
| 2011 | Vtest = -8.1 mV, HV = -129.6 V, drift ends. 2.5% HV loss. Lag ratio = 1.1ish. |
| 2011 | Tower = 48.9 mK |
| 2140 | Tower = 49.1 mK |
| 2150 | Start a 60 min series at HV = -100V, drifting 0.0298 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (0,320,370,0)/(0,360,420,410)uA, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pD threshold = 12 Use sequence HVdrift_neg100V_pre15_2min_29p8mVps_multiloop10_60min.msl |
| 2150 | Vtest = -6.5 mV shortly after drift begins. Drift appears to start at -102.7 V. 2.5% HV loss. |
| 2256 | Vtest = -12.9 mV, HV = -210.2 V, drift ends. 2.5% HV loss. Lag ratio = 1.1ish. |
| 2256 | Tower = 48.8 mK |
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| Boiloff this time is slower than last. Maybe still not quite as slow as early in the run. table |