2017/05/16 (Tuesday)
| Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 | |
| PuBe source in paraffin barrel behind shield (west side) Na-22 source hanging along southeast column of fridge stand |
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| 0920 | Tower/MC/Coldplate = 32.9/30.6/193 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 225/220 mbar, 1K Pot = 1.679 K / 26 mbar. Main Bath = 67.9%. |
| 0925 | Fill LN2 cold trap bath |
| 0927 | return 22Na source to safe |
| 1515 | Place Na-22 source near fridge hanging along southeast column of fridge stand |
| 1619 | Take test data series, testing a sequence for taking IbIs data |
| 1625 | Take test data series, testing a sequence for taking IbIs data. This one sets biases to 280, starts data, waits 10 sec, changes biases to 279, waits 10 sec, then ends data. |
| 1630 | Take test data series, testing a sequence for taking IbIs data. This one sets biases to 280, starts data, waits 10 sec, changes biases to 200, waits 10 sec, then ends data. |
| 1650 | Set all the QET biases and driver gains back to their standard values for PuBe data. Also adjust the driver offsets to get all baselines around -0.6 to -0.8. All channels are working, although noise is probably worse than average. |
| 1655 | Fill LN2 cold trap bath |
| 1840 | return 22Na source to safe |
| 1843 | prebias to 65V |
| 1848 | dial down to 50V |
| 1850 | Start 13 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (15/15/10)/(3/4/4), OG = 4/2, QET biases = table from Apr 28, with 1000 beginning randoms, no flashing, and a 1500ADC bin threshold trigger on DCRC4 pA (140mV external NaI trigger). Running OR trigger of NaI detectors with PuBe source on west side of shield. NaI detector C has 311 mV threshold and detector B has 288 mV threshold |