2016/11/06 (Sunday)
| Note that times are CST, changed from CDT | |
| 1030 | check Rps on all Side 1 QETs and start QET tuning. |
| Setup: DIB1/3/4 → 3.2 MHz filters → cables 1,2,3 → HV board inputs 1,3,2 → HV board outputs 1,2 → DCRC55(1)/50(3) | |
| 1100 | Tower/MC/Coldplate = 33.4/34.7/246 mK, Still = 1.3 K / 110 μbar, G1/G2 = 170/150 mbar, 1K Pot = 1.70 K / 32 mbar. MB = 29.4%. Boiloff rate: closer to slow- than fast-mode |
| 1110 | Fill LN2 cold trap bath. |
| 1128 | Begin LHe transfer at 28.3% |
| 1200 | Finish LHe transfer at 91.5% |
| 1212 | Release pressure from main bath |
| 1300 | 2.5 hours after commencing tuning, all QETs are in transition (and hopefully stable) with between 85pW and 130pW equilibrium bias power. Values recorded in spreadsheet |
| 1310 | Release pressure from main bath. |
| 1311 | 07161106_1310 . 0V noise data set (~26ms) with today's QET biases as a baseline comparison to all the negative Vdet biasing work we plan to do today. |
| 1330 | 07161106_1330 . -5V noise data set (~26ms). All channels look good. |
| 1357 | quickflash |
| 1358 | Release pressure from main bath. |
| 1418 | 07161106_1418 . -15V noise data set (~26ms). DCRC3chB should be checked regarding whether it should be used in pt. |
| 1440 | quickflash |
| 1505 | 07161106_1506 . -30V noise data set (~26ms). DCRC1chC looks horrendous (oscillation at ~8kHz, and higher harmonics). DCRC3chB also must be scrutinized in the analysis. |
| 1535 | quickflash |
| 1553 | 07161106_1553 . -45V noise data set (~26ms). Same as -30V data set above in terms of channels to be aware of in analysis |
| 1619 | 07161106_1616 . short (4 dump) noise data set going from -45 to 0V |
| 1621 | quickflash |
| 1648 | 07161106_1648 . -60V noise data set (~26ms). DCRC1chC fixed initially, showing small amounts of oscillation by dump 12. DCRC3chB still has some ~100Hz junk. However, the clear shot noise is present on all channels |
| 1710 | quickflash |
| 1944 | Cf-252 hung inside shield for overnight activation. leaving now. |