2017/04/17 (Monday)
| Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 → gender changer 3/1/2 → DCRC55(1)/33(2)/X(4) | |
| 0910 | Tower = 33.6 mK, main bath = 60.4%. Boil off rate: close to slow mode (predicted level: 61.9%) |
| 0915 | Trying to find good QET bias settings for all 9 working channels. Notice that DCRC1pC is falling into s/c before getting down to yesterday's setting, so will need to redo IbIs on that one. Also still need to do DCRC1pB |
| 0930 | Finish IbIs on DCRC1pB/Side1pB. |
| 1000 | Finish IbIs on DCRC1pC/Side1pD Results are quite different from yesterday's measurement. Not sure why. Yesterday's was shortly after the transfer ended, not sure if that should matter. |
| 1010 | Fill LN2 cold trap bath. |
| 1035 | DCRC4pB also seems to be behaving differently today. Redo its IbIs too. |
| 1055 | Finish IbIs on DCRC4pB/Side2pF. It's very different from Friday's measurement |
| QET bias settings to achieve Ib*prefactor = 20 uA | ||||
| DCRC channel | Detector channel | Ib*prefac [uA] | QET bias | date measured |
|---|---|---|---|---|
| DCRC1 pA | Side1 pE | 20 | 124.5 | April 15 |
| DCRC1 pB | Side1 pB | 20 | 137.1 | April 17 |
| DCRC1 pC | Side1 pD | 20 | 123.5 | April 17 |
| DCRC1 pD | Side2 pE | 20 | 135.5 | April 14 |
| DCRC2 pA | Side2 pB | not working | ||
| DCRC2 pB | Side2 pA | 20 | -123.7 | April 14 |
| DCRC2 pC | Side1 pA | 20 | -121.7 | April 14 |
| DCRC2 pD | n/c | not connected | ||
| DCRC4 pA | Side2 pC | not working | ||
| DCRC4 pB | Side2 pF | 20 | 142.3 | April 17 |
| DCRC4 pC | Side1 pC | 20 | 141.9 | April 14 |
| DCRC4 pD | Side1 pF | 20 | 150.9 | April 16 |
| Measurements are from most recent IbIs in current setup | ||||
| 1112 | Start sequence of |
|---|---|
| 1116 | Adjust trigger threshold up from 15 to 17 ADC bins |
| 1116 | Adjust trigger threshold up from 17 to 20 ADC bins |
| 1248 | Adjust trigger threshold down from 20 to 18 ADC bins |
| 1314 | Adjust trigger threshold down from 18 to 17 ADC bins |
| 1430 | Stop data early to do the LHe transfer. |
| 1430 | Start LHe transfer (MB = 52.7%) |
| 1440 | Tower/MC/Coldplate = 33.1/30.8/197 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 253/227 mbar, 1K Pot = 1.680 K / 28 mbar. |
| 1535 | Finish LHe transfer (MB = 90.7%) |
| 1548 | Start sequence of 17, 1-hour data series of 2-sided 0V data with Frontend Gain = (20/20/15/20)/(-/4/4/-)/(-/3/5/5), OG = 4/2/4, QET biases = table above, with 1000 beginning randoms, no flashing, and a 17ADC bin threshold trigger on DCRC1 pA |
| 1550 | Tower = 33.4 mK |
| 1830 | Fill LN2 cold trap |