2016/12/09 (Friday)
| Setup: DIB1/3/4 → 3.2 MHz filters → cables 1,2,3 → HV board inputs 1,3,2 → HV board outputs 1,2 → DCRC55(1)/50(3) | |
| Taking overnight data at HV=45 V. DAQ crash of some sort. Data continued to be written, but the sequence hung up sometime during the _0535 series. That series kept going well beyond the standard 60 minutes, and was still going when I arrived this morning. The restart done at 8:35 caused the _0535 series to end and the final series of the sequence to begin. Crash report has been logged along with error messages at 5:51 am. As of this morning the data coming in still looks good. |
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| 0825 | Main bath = 38.0% |
| 0825 | HV = 45.02 V, Vtest = 2.6 mV. So Vdetector = 43.9 V |
| 0830 | MIDAS web interface is not working, “unable to connect”… |
| 0835 | Followed procedure to restart DAQ web interface. Did not do a kill, just a start. Web pages are back up and running. |
| 0905 | Attempt to Stop immediately the current sequence, but it doesn't seem to work. The Sequencer page seems to respond to the button being pressed but then the sequence simply continues. Try again and it finally works (about 4 tries total). “Are you sure” dialog box came up this time. |
| 0925 | Perform microIbIs at 45V. Vbias is lower in all channels than in the 0V case from Dec 6 15:00, for some reason. They range from 20 to 55 mV lower than the previous values. They are higher than what we measured yesterday at 15V. |
| 1030 | Tower/MC/Coldplate = 33.0/35.8/221 mK, Still = 1.2 K / 110 μbar, G1/G2 = 187/154 mbar, 1K Pot = 1.68 K / 24 mbar. MB = 35.0%. Boil off rate: a little bit faster than slow mode. |
| 1120 | Finish mico IbIs at 0V. Vbias values are similar to 0V measurements from yesterday, with an average reduction of 107 mV at 2x driver gain. |
| 1200 | Flash detector. |
| 1210 | Oops, flashandflash was configured improperly so I flashed for 10 mins. Tower temp reached 550mK. |
| 1233 | Adjust trace lengths in ODB for DCRC1, DCRC3 to ChargeWaveFormLength = 131072, PhononWaveFormLength = 65536 |
| 1237 | Start LHe transfer (31.7%). |
| 1314 | Finish LHe transfer (91.2%). |
| 1318 | Start 0V HV long trace random data set with 26.2144ms trace length, x2 driver gain, 20Hz in-runrandoms with no starting/ending randoms. |
| 1334 | Release pressure from MB. |
| 1352 | Stop data after 30 mins. Flash detector. |
| 1407 | Start 60V HV long trace random data with 75V, 10min prebias (Wanted to do 5 mins, but got distracted [image not archived: facepalm.svg] ) and 26.2144ms trace length, x2 driver gain, 20Hz in-runrandoms with no starting/ending randoms. Trying to replicate Bill's procedure [ Run diary, Note ]: Start taking data. After 5 sec, begin increasing bias at around 1V/sec. Reached +75V 1 min into data. After additional 10 minutes, reduce to operating bias of 60V. Take data for another 20 mins. |
| 1437 | Stop data, flash detector. |
| 1454 | |
| 1523 | Abort data, screwed this one up too by reducing the bias too much… Flash detector. |
| 1538 | Start 60V HV long trace random data with 75V, 5min prebias and 26.2144ms trace length, x2 driver gain, 20Hz in-runrandoms with no starting/ending randoms. Start taking data. After 5 sec, begin increasing bias at around 1V/sec. Reached +75V 1 min into data. After additional 5 minutes, reduce to operating bias of 60V. Take data for another 30 mins. |
| 1616 | Stop data, flash detector. |
| 1617 | Fill LN2 dewar full. |
| 1630 | Start 60V HV long trace random data with 90V, 5min prebias and 26.2144ms trace length, x2 driver gain, 20Hz in-runrandoms with no starting/ending randoms. Start taking data, after 5 sec, begin increasing bias at around 1V/sec. Reached +90V 1 min into data. After additional 5 minutes, reduce to operating bias of 60V. Take data for another 30 mins. |
| 1708 | Stop data, flash detector. |
| 1710 | Reset trace lengths to 3.2768ms by setting ODB values: ChargeWaveFormLength = 16384, PhononWaveFormLength = 8192 |
| 1717 | Per our adopted CDMSlite-style prebiasing, bias detector to 75V as tower is cooling from flash. |
| 1719 | All channels except DCRC3 PD currently railed. DCRC3 PD has a pretty crazy baseline. |
| 1721 | Other channels starting to un-rail themselves. |
| 1722 | Reduce bias to 60V. |
| 1730 | Start a sequence of 14 1-hour series of 60V data with Frontend Gain = 5, OG = 2, DCRC3pB intentionally railed, with 1000 beginning randoms, with no flashing in between series, and a 25ADC bin threshold trigger on DCRC3 pD. |
| 1735 | Abort data trigger threshold looks too high. We'd like it to be low enough to catch some noise traces. |
| 1737 | Start a sequence of 14 1-hour series of 60V data with Frontend Gain = 5, OG = 2, DCRC3pB intentionally railed, with 1000 beginning randoms, with no flashing in between series, and a 15ADC bin threshold trigger on DCRC3 pD. |
| 1741 | This looks to be a decent trigger with a good balance of noise and pulses. Gonna let this run overnight. |
| 1955 | Notice DCRC1pC is railed low. Will try to adjust… |
| 1959 | Adjust DCRC1pC ADCoffset from 0.434 to 0.134. This seems to do the trick. |
| 0733 | DCRC3pC is railed low. But sequence is almost finished, no point fixing it. |