| | 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. |
| 1038 | Tower/MC/Coldplate = 87.8/59.8/389 mK, Still = 1.19 K / 0.11 mbar, G1/G2 = 131/130 mbar, 1K Pot = 1.60 K / 20 mbar. MB = 63.8% |
| | Looks like the tower was cooling at ~20mK/hr last night, but once it hit 88.5 mK at around 23:00 last night, the rate slowed dramatically to .08 mK/hr |
| 1044 | Tweak 1K pot needle valve. |
| 1045 | Data from yesterday indicates we have fixed the channel shorts from last run! Let's move ahead with some serious data taking. |
| 1049 | Since we are only taking charge data with pulse fall times of ~60 us, we don't really need the full 3.2768 ms standard trace length. Shorten charge trace lengths to 1.6384 ms (chargewaveformlength=8192) on DCRCs 1,2,3. |
| 1056 | Start series of data with Vbias(external) = -50.01 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). |
| 1126 | Dumps have all been ~140MB, traces still look good. |
| 1127 | Since adjusting needle valve, 1K pot pressure has stabilized at 50 mbar. However, tower temp has been oscillating ±3mK about 87.5 mK. |
| 1139 | Dumps started falling in size at around 35 min. Stop the run, ground the detector. |
| 1140 | MC temperature is also oscillating. This was observed last run as well and was stabilized by heating the still. |
| 1142 | Crap, remote IGH control wasn't enabled and I crashed all the vi's trying to apply still heat. Trying to recall how to start them all up again… |
| 1205 | Got all the vi's back. |
| 1210 | Apply 4mW heat to still. Still: 0.13→0.18 mbar, MC temp flat at 60.5 mK |
| 1224 | Apply 6mW heat to still. Still: 0.18→0.20 mbar, MC temp flat at 56.8 mK |
| 1236 | Tower temp is stable at 85.5 mK |
| 1237 | Flash for 60s with flashandflash tool. |
| 1238 | Fill LN2 cold trap. |
| 1258 | Tower = 86.1 mK |
| 1300 | Start series of data with Vbias(external) = -70.0 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). |
| 1350 | Dumps started falling in size at around 52 min. Stop the run, ground the detector. |
| 1358 | Flash for 60s with flashandflash tool. |
| 1419 | Tower = 86.6 mK |
| 1421 | Start series of data with Vbias(external) = 70.0 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). |
| 1514 | Dumps started falling in size at around 48 min. Stop the run, ground the detector. |
| 1515 | Flash for 60s with flashandflash tool. |
| 1538 | Tower = 86.3 mK |
| 1539 | Start series of data with Vbias(external) = 50.0 V, with 1000 beginning randoms, and a 80 ADC bin threshold trigger on DCRC3qO (QE) only, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1604 | Stop the run, ground the detector, flash for 60s with flashandflash tool. |
| 1631 | Tower = 86.4 mK |
| 1632 | Separated DCRCs to try and reduce electronic noise. Must have bumped something because tower temp began slowly climbing. |
| | Restarting DCRC programs didn't help, but powering down DCRC3 did. Starting it back up heats the fridge. Power cycle all 3 dcrcs. Turning of DCRCs 1,2 does nothing, but adding DCRC3 heats the fridge. Power down DCRC3, fridge cools. |
| 1646 | Let DCRC3 sit and think about what it has done for a minute. Re-seat all detector cables in case something was disconnected. Now, power on DCRC3, no heating. |
| 1651 | Start series of data with Vbias(external) = 30.0 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). |
| 1652 | Tower = 85.2 mK |
| 1704 | Getting some noise in traces, raise all trigger levels by 10 → 80/70/80/110/90 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO |
| 1709 | Still getting a good amount of noise traces, raise all trigger levels by 10 again→ 90/80/90/120/100 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO |
| 1719 | The triggering is working kinda strangely. There will be a few good events in a row, then a bunch of noise traces. Try disabling DCRC3 triggers. |
| 1728 | Oh, that helped a lot. Now its all pulse triggers. This is around event 282450 |
| 1733 | Stop the run, ground detector. |
| 1734 | Start 12 hour bake. |
| 1740 | Fill LN2 cold trap full |