2022/04/01 (Friday)
- Lab in-personnel: Matt
| Status | Run 76 in progress |
|---|---|
| Setup | Cable 2/1/3 → diverter/nothing/nothing → DCRC50(3)/DCRC55(1)/DCRCX(4) |
| 1205 | Testing external triggering. Plug in DCRC6 and connect it to the diverter board with the lemo connector soldered to the LED1 pin. Set up the ODB accordingly, with ConnectLEDVoltagesToPhononADCs enabled. Connect the Wavetek function generator to the lemo input. Can see this on pA, and can trigger on it. |
| Notes on ODB settings for DCRC6: ConnectLEDVoltagesToPhononADCs enabled LED current = 0 QET bias = 0, ADCOffset = 0, PGAGain = 1 Polarity = 1 (inverted) 15V Power disabled |
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| 1215 | Goldman = 72.6 mK @ 632 uV excitation |
| 1220 | MC/Coldplate = 28.6/140 mK, Still = 1.11 K / 0.120 mbar / 0 mW, G1/G2= 190/178 mbar, 1K Pot = 18° / 1.64 K / 23±2 mbar. MB = 69.7% |
| 1225 | Fill LN2 cold trap bath |
| 1430 | Connected a signal from the NaI setup to the lemo connector on the diverter board to DCRC6. Messed around with triggering. At first it was a TTL signal, which is very short, a small fraction of the DCRC sampling rate of 800 ns. It seemed to be able to trigger on this at times, but the DCRC acted a little erratic in terms of triggering (note the rate is kinda high, though not huge). Then Anthony modified the signal with a Quad Gate/Delay Generator, which inverted it so the pulses look upright and has a settable width, set to around 70 us erect square pulses. Looks like it will trigger on these, though when looking at it with the pulse viewer it would trigger for a while then either seize up or at some point it would start triggering constantly - dumb. |
| 1453 | Start test data series, DCRC6 only with triggers from NaI array, 13 min long, no initial or in-run randoms, trigger on DCRC6pA threshold 100, baseline/sample = 16/5. PhononWaveFormLength reduced to 2048, 1/4 of normal. Start series with the Start Button. |
| Data was taken but for some reason was not readable with BatViewer. | |
| 1515 | Start test data series, DCRC6 only with triggers from NaI array, 4 min long, no initial or in-run randoms, trigger on DCRC6pA threshold 100, baseline/sample = 16/5. PhononWaveFormLength restored to 8192, standard length. Start series with the Start Button. |
| this data also not readable by BatViewer, dammit. | |
| try enabling DCRC1 and DCRC6 together. | |
| 1533 | Start test data series, DCRC1 & DCRC6, 6 min long, no initial or in-run randoms, trigger on DCRC6pA threshold 100, baseline/sample = 16/5. PhononWaveFormLength to 8192, standard, on both DCRCs. Start series with the Start Button. |
| OK this one reads with BatViewer, for whatever dumb reason (it may look for Zip 1-3 as the first one and break if it doesn't see them). | |
| Unfortunately DCRC6 trigger seems to go crazy after a short time. For the first ~ 350 events the signal pulses to DCRC6 show up where they should, at 400 us, but after that it seems to start triggering constantly. | |
| 1655 | Fill LN2 cold trap bath |
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