UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20160120

2016/01/20 (Wednesday)

Previous Day

Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50
Taking Y-88 data overnight. Last flash at 23:08. Why so early? Looks like DAQ stopped taking data too soon.
0905 Tower/MC(H35)/MC sensor/Cold Plate = 31.5/26.5/39/151 mK, Still = 1.10 K / 0.12 mbar, G1/G2 = 155/138 mbar, 1K Pot = 1.73 K / 19 mbar, Main bath = 32.9%
0915 Fill LN2 cold trap Dewar.
0925 Noticed that in the data beginning around noon yesterday the DIB2 phonon channels had very low noise amplitudes. In the ODB it appears that “PGAGain” for DIB2 phonons is set to 1; it should be set to 3. Although I'm not sure if the value to be entered is 3 or 8… register value 3 means 3 on RevC but it means 8 on RevC.1. Does MIDAS translate from input 8 down to register 3? The RevC.1 boards are set to 8 on the ODB.
0943 Start 30min 88-Y series at +4/-4V with FG=5/2/5, OG=3, with 1000 initial randoms, 1000 ending randoms, 30s flash and 25 minute cooldown before series. Trigger on DIB1 phA with threshold of 30ADC bins.
1041 Start 30min 88-Y series at +4/-4V with FG=5/2/5, OG=3, with 1000 initial randoms, 1000 ending randoms, 30s flash and 25 minute cooldown before series. Trigger on DIB1 phA with threshold of 30ADC bins.
1205 Pausing for some MIDAS test activity, so place Cf source in shield for activation while we're not taking data.
1440 Commence LHe transfer (23.3%).
1526 Complete LHe transfer (89.7%).
1640 After the MIDAS tests, check all the pulses. Looking good.
1645 Place Cf source back in safe. 88-Y source only one left inside shield.
1657 Start 17 hours of 30min 88-Y series at -4/+4V with FG=5/2/5, OG=3, with 1000 initial randoms, 1000 ending randoms, 30s flash and 25 minute cooldown before series. Trigger on DIB1 phA with threshold of 30ADC bins.
1700 Fill LN2 cold trap full.

Next Day