2021/03/11 (Thursday)
- Lab in-person: Ruiren
- Virtual partner: Matt
| Status | Run 74 in progress. Investigating whether we can connect to Side2. Currently trying to ground Side 2 via breakout box. |
|---|---|
| Setup: DIB1/2+acc → SL 41/43 → 3.2 MHz filters → cables 2/3 → nothing/nothing → DCRC50(3)/ |
|
| 0827 | MB = 32.7% |
| 0855 | Tower = 91.4 mK |
| 1047 | Ruiren enters lab |
| 1048 | Tower/MC/Coldplate = 92.5/37.7/186 mK, Still = 1.43 K / 0.130 mbar / 0 mW, G1/G2 = 368/338 mbar, 1K Pot = 1.69 K / 45±2 mbar. |
| 1052 | Fill lN2 cold trap bath |
| 1053 | Ruiren leaves lab |
| Yesterday's sequence did not write to disk. MIDAS Messages doesn't show any mentions of copying data, as if Logger/Write Data was not enabled. This happened once before and I suspected maybe it was because the Pulse Viewer was left on and it was somehow interfering with the ODB. That may have happened again yesterday. |
|
| 0912 | Start test data series after enabling Logger/Write Data. Start series with the Start button. |
| 0914 | Looks like this data is writing to disk. Stop series. |
| 0920 | At 10 kHz noise in DCRC3qI/qO = 4.2/2.6 e-6. Less than half what it was yesterday. Check trigger thresholds, looks like yesterday's are still as low as we can go. |
| 0926 | Start 31min series of +7V data (bias applied after 1 min), with Cable 3(DCRC1) plugged into breakout box and ground cable from Side2 to DCRC3 Dsub, with 1000 beginning randoms, trigger threshold 250/200 on DCRC3qI/qO, no in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use sequence r74_takeandflash_dcrcbias.msl |
| It's triggering constantly, crap. | |
| 0936 | Adjust trigger thresholds → 500/400 |
| 1501 | Ruiren enters lab |
| 1515 | started LHe transfer, main bath at 20.5% |
| 1555 | ended LHe transfer, main bath at 89.6% |
| 1618 | Ruiren leaves lab |
| 1956 | Start 31min series of +11V data (bias applied after 1 min), with Cable 3(DCRC1) plugged into breakout box and ground cable from Side2 to DCRC3 Dsub, with 1000 beginning randoms, trigger threshold 500/400 on DCRC3qI/qO, no in-run randoms, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). Use sequence r74_takeandflash_dcrcbias.msl |
| Triggers look OK | |
| 1958 | MB = 87.0% |