| | Setup: DIB 1/3/4 → 3.2 MHz filters 1/2/3 → cable 1/3/2 → gender changers → rerouting boards 1/3/4 → DCRC55(1)/33(2)/50(3) |
| | Status: Cooling to base, baking overnight. |
| 0805 | Tower = 802 mK |
| 0835 | Looks like there was a DAQ crash. Probably the LEDs are still on. |
| 0835 | Tower/MC/Coldplate = 806/194/432 mK, Still = 1.19 K / 0.190 mbar, G1/G2 = 116/118 mbar, 1K Pot = 1.68 K / 55 mbar. MB = 36.0% |
| 0840 | Restart MIDAS DAQ. Start MIDAS programs (dcrc driver, tower fe, trigger fe). Tower temperature immediately starts to fall. |
| 0845 | Fill LN2 cold trap bath |
| 0845 | Looking at Sep 15 it says that the correct arrangement of SQUETs for the external LED wiring is DIB3 is ZC-26, DIB4 is ZC-37. But the run summary page shows the incorrect SQUET arrangement, DIBs 1, 3, 4 → SQUET ZC13, ZC37, ZC26… it wasn't updated. I'm worried that we have them in the wrong orientation now. But shouldn't that have shown up in the electrical checkout? |
| 0835 | Tower/MC/Coldplate = 358/113/387 mK, Still = 1.17 K / 0.160 mbar, G1/G2 = 104/107 mbar. |
| 1030 | Tower/MC/Coldplate = 321/99/393 mK, Still = 1.25 K / 0.160 mbar, G1/G2 = 97/98 mbar. Pressures are flat, Tower is cooling. |
| 1253 | Start LHe transfer (MB = 29.0%) |
| 1407 | End LHe transfer (MB = 88.7%) |
| 1535 | Tower/MC/Coldplate = 246/85/394 mK, Still = 1.20 K / 0.130 mbar, G1/G2 = 109/108 mbar. Pressures are flat, Tower is cooling. |
| 1540 | Apply 50.03 V bias to external electrode. Vtest < 0.00 mV. |
| 1543 | Start series of data with Vbias(external) = 50.03 V, with 1000 beginning randoms, and a 40 ADC bin threshold trigger all 5 charge channels except DCRC3qI = 50 ADC, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1550 | Dumps are quite large, 230 MB. Looking at pulses with BatViewer suggests DCRC3 is maybe the one with the highest noise. Increase DCRC3qI threshold 50→60 and DCRC3qO threshold 40→50. |
| 1554 | Dumps are still very large. Increase DCRC1qI and qO thresholds 40→50 ADC. |
| 1603 | Dumps are still very large. Increase DCRC3qO threshold 40→50 ADC. |
| 1611 | Dumps are still very large. After comparing today's peak-to-peak baselines with yesterday's, set the following: DCRC1qI/qO/DCRC2qO/DCRC3qI/qO = 50/40/50/80/60 ADC. |
| 1618 | Dumps are still very large. Raise each by 20: DCRC1qI/qO/DCRC2qO/DCRC3qI/qO = 70/60/70/100/80 ADC. |
| 1625 | Dumps are now down to around 80-100 MB. BatViewer shows a high percentage of visible pulses. |
| 1640 | Dump size is falling steadily, approximately exponential with time. From 16:21 to 16:34 the dump sizes have fallen from 130 MB to 40 MB. Should stop and flash. |
| 1646 | Stop data. Dial voltage to zero and ground detector. |
| 1650 | Tower = 229 mK. |
| 1650 | Flash for 60 seconds with DCRCs 2&3 using flashandflash tool. Tower temperature peaks at about 750 mK. |
| 1700 | Tower is down to 226 mK. Start some more data… |
| 1700 | Start series of data but forgot to set the bias. Dumb. Abort. |
| 1700 | Apply bias of 50.02 V to external electrode |
| 1703 | Start series of data with Vbias(external) = 50.02 V, with 1000 beginning randoms, and a 70/60/70/100/80 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1710 | Dump sizes are high, >200MB. But looking at BatViewer there seem to be reasonable pulses in all channels at the trigger time. So I guess it's ok. |
| 1720 | 16 minutes of data, dump sizes still haven't decreased noticeably. Maybe at this rate it's hard to tell when we start to lose neutralization. Will continue for a bit more, then stop data and flash, then leave for the night. |
| 1727 | Stop data. Dial bias down to 0 V then short electrode. |
| 1730 | Flash for 60 seconds with DCRCs 2&3 using flashandflash tool. |
| 1735 | Fill LN2 cold trap bath |