| | Setup: DIB 1/3/4 → 3.2 MHz filters 1/2/3 → cable 1/3/2 → gender changers → rerouting boards 1/3/4 → DCRC33(2)/DCRC55(1)/DCRC50(3) |
| 0905 | Tower/MC/Coldplate = 82.4/57.4/355 mK, Still = 6 mW / 1.18 K / 0.20 mbar, G1/G2 = 296/273 mbar, 1K Pot = 1.657 K / 40 mbar. MB = 32.2% |
| 0910 | Fill LN2 cold trap bath. |
| 0920 | Detector has been grounded overnight. No flashing since the last data run last night. Let's try biasing it now and taking some more data. |
| 0921 | Apply 10.00 V bias to external electrode |
| 0921 | Start series of data with Vbias(external) = 10.00 V, with 1000 beginning randoms, and a 35 ADC bin threshold trigger on DCRC2qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 0935 | Dumps started out around 37-40 MB. Start falling at Dump 7, reach min of 3-7 MB at Dump 13. This is just as good as a full flash. So leaving the detector grounded overnight is as good as flashing. Next we should try grounding the detector for ~20 minutes and see whether that is as good as flashing. |
| 0941 | Stop data, dial HV down to 0 V, ground electrode |
| 1006 | Apply 10.01 V bias to external electrode |
| 1006 | Start series of data with Vbias(external) = 10.00 V, with 1000 beginning randoms, and a 35 ADC bin threshold trigger on DCRC2qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1025 | Dumps start around 38-41 MB. Start falling at Dump 7, reaching min of 4-5 MB at Dump 13. So grounding the detector for 25 minutes is as good as flashing and then waiting for 25 minutes. |
| 1033 | Dial bias down to 0V and ground electrode. This time I'll leave the data going, see what happens. |
| 1105 | After grounding, the dump sizes increased to 15 MB for 5 dumps, then increased a bit more, rising for 3 dumps to 21 MB, then fell for 6 dumps to a minimum of 5-7 MB. |
| 1110 | Start LHe transfer (MB = 29.1%) |
| 1209 | End LHe transfer (MB = 90.7%) |
| 1400 | Let's try to get triggering on all channels again. We'll set the thresholds 1 by 1 while watching the SQUIDTuningGUI. |
| 1410 | Initially try triggering on DCRC1QO, but it seems to be in a bad state where we get constant triggering even for thresholds of 1000 ADC. Stop run, restart programs, restart run. Now it triggers sensibly. |
| 1418 | Try changing trigger window, but it doesn't seem to change the rate much. |
| 1420 | Try changing DCRC1QI (disconnected channel) Qamp offset to 0 to see if it changes noise pattern. It doesn't. |
| 1435 | Set the triggers at 0V applied as follows. |
