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2022/05/05 (Thursday)

Previous Day

  • Lab in-personnel: Matt
Status Run 76 in progress
Setup Cables 2/3/1 → diverter/nothing/nothing → Side2-readout HV CONN 1/3/2 → HV 1(L)/2(R) → DCRC50(3)/DCRC55(1), DCRC33(2)→HV control, NaI trigger signal → DCRCX(4)
1220 MC/Coldplate = 28.3/149 mK, Still = 1.09 K / 0.100 mbar / 0 mW, G1/G2 = 99/94 mbar, 1K Pot = 18° / 1.56 K / 9±1 mbar, MB = 71.2%
1225 Fill LN2 cold trap bath
1515 Start setting up DCRC4 to read triggers from NaI. On ODB, enable ConnectLEDVoltagesToPhononADCs, set LED current = 0 and 15V Power disabled, set QET bias =0, ADCoffset = 0, PGAGain = 1, Polarity = 1 (inverted).
1520 Turn off DAQ programs then enable only DCRC4 alone. Start a data series and view pulses. Seeing square pulses from NaI array. Try triggering on the pulses - looks good!
1530 Look at random traces to estimate current NaI trigger rate (the last test had only one detector, Det23, triggering so the rate is pretty low). Count only 7 pulses in 200 3.2768-ms traces so 11±4 Hz.

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