| | Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50. |
| | Overnight: the Y-88 source was on the fridge, although there was no sign on the door or note in the run diary to indicate this. It looks as though MIDAS data was taken in typical undocumented fashion: according to the tower temperature flashes were occurring every hour, last flash at 5:54. |
| 0855 | Tower/MC(H35)/MC sensor/Cold Plate = 30.9/25.2/41.2/159 mK, Still = 1.36 K / 0.11 mbar, G1/G2 = 120/115 mbar, 1K Pot = 1.69 K / 15 mbar, Main bath = 53.3% |
| 0900 | Fill LN cold trap Dewar |
| 0935 | Some observations about state that DAQ was left in after MIDAS data-taking: The detector was left in a biased state (-4/+4 V); The bias settings were at exactly -4 V and +4 V, rather than using the calibrated values; DIB1 pA, DIB2 pD, DIB3 pC, and DIB3 pD were railed; DIB1 pD and DIB2 pD had non-standard gain settings (perhaps they had been left at these settings during Friday noise tests and MIDAS was simply returning them to these states after it finished). |
| 0945 | Set charge biases to 0 V |
| 1030 | Flash 30s. |
| 1110 | Start 1000 randoms of 20ms trace length background data with all phonon channels set to Open Loop, all phAs and phBs at transition QET biases, phCs at 400/-400/400uA QET biases (normal resistance), and phDs at 0uA QET biases (superconducting), 0V Qbias FG=5/2/5, OG=3, 2000 events/file. Some channels railed, so Stop Data. |
| 1120 | After setting all Driver Offsets to 0 to unrail the channels, Start 1000 randoms of 20ms trace length background data with all phonon channels set to Open Loop, all phAs and phBs at transition QET biases, phCs at 400/-400/400uA QET biases (normal resistance), and phDs at 0uA QET biases (superconducting), 0V Qbias FG=5/2/5, OG=3, 2000 events/file. |
| 1228 | New test will be to modify SQUID biases and lockpoints to cut the modulation depth of the phonon channels in half. |
| | Attempting to send triangle waves down the phonon channels doesn't seem to be working. |
| 1247 | DIB3's FETs are turned off for some reason? Turn them back on. |
| | LabVIEW freezes while attempting to communicate with the DCRCs. Force quit, and restart all the programs. |
| 1318 | Tower temperature has been gradually rising from 30.7mK to 30.8mK during this whole LabVIEW misbehaving nonsense. |
| 1324 | No communications are working at this point. Unpower the boards. |
| 1336 | Repower DCRCs. Zap and apply settings. |
| 1403 | Temperature has risen to ~31mK. Though now it's started falling back to regular levels again. |
| 1405 | Test signals are working now. Start modifying the SQUID biases on DIB1 so as to halve the Vpp of the modulation curve: |