2017/03/13 (Monday)
| Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 | |
| 0925 | Tower/MC/Coldplate = 33.0/30.5/190 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 258/218 mbar, 1K Pot = 1.699 K / 30 mbar, Main bath = 36.6%. Boil off rate: close to slow mode (predicted level 39.2%) |
| 0925 | Fill LN2 cold trap full. |
| 1200 | The slowness of data getting copied to the /byseries directory has been attributed to a problem with the data database: Lazy Logger was failing to communicate with the couchdb database which was slowing down copying to > 1 minute per dump. Anthony modified the file online/scripts/lazylog/copy_rawdata.py so that currently it does not try to communicate with the database. It should be changed back when the database is online again. |
| 1345 | Start LHe transfer (MB = 29.5%) |
| 1511 | End LHe transfer (MB = 91.6% ) |
| 1600 | Finish IbIs on DCRC1 pC |
| channel | QET bias | prefactor | QETbias*prefactor | Selected QETbias*prefactor | New QET bias |
|---|---|---|---|---|---|
| DIB1pA/Side1pE | 127 | 0.2129 | 27.04 | 40 | 130.2 |
| DIB1pB/Side1pB | 150 | 0.3514 | 52.71 | 40 | 143.4 |
| DIB1pC/Side1pD | 130 | 0.3014 | 39.18 | 40 | 130.4 |
The table above (combining today's and Friday's IbIs) shows that the dP/dI for DIB1pC is nearly at the same value that pA and pB were already set to. For tonight's data we'll leave DIBpC at 130 μA just to keep consistent with the weekend data.
| 1614 | Set HV to 5.01 V, V_leak = 0.8mV, V_crystal = 4.66 V |
|---|---|
| 1617 | Start sequence of 14, 1-hour data series of 1-sided 5V HV data with Frontend Gain = (20/20/20)/(-/4/3), OG = 4/2, with 1000 beginning randoms, no flashing, and a 15ADC bin threshold trigger on DCRC1 pA |
| 1619 | HV = 5.008 V, V_leak = 0±0.1 mV, V_crystal = 5±.04 V |
| 1627 | Notice DCRC2 PC is railed. Adjust driver offset from 0.07 to 0.4 |
| 1714 | Fill LN2 cold trap full. |
| 1845 | DCRC2 pC has a rather high baseline still, around 13000 on BatViewer. Will adjust driver gain again… |
| 1850 | Adjust DCRC2 pC driver offset down from 0.4 to 0.3. Looks like it brought the baseline down to about 4400, that's better. |
| note | /byseries data directory is being populated quickly, within about a minute of the dump finishing |