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2020/07/21 (Tuesday)

Previous Day

  • Lab in-person: Matt
  • Virtual partner: Pramod
0730 Matt Fritts body temperature = 96.4 F
Setup Run 73. DIB 1/3/4 → Stripline 43/48/41 → Cable 3/1/2 → nothing/nothing/accessory_interposer → HV_Conn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC50(3)-master; DCRC33(2) → HV control. DCRCs on overnight. Lead/poly shield erected (4 lead walls, 2 poly walls).
0650 MB 24.9%
0730 Tower = 62.2 mK, G1/G2= 243/228 mbar, Still = 0.160 mbar / 5 mW, 1K Pot = 1.69 K / 45±4 mbar.
Tower cooled steadily till about 1am (61 mK min) but has risen since.
0850 Tower/MC/Coldplate = 62.6/30.7/188 mK, Still = 1.45 K / 0.16 mbar / 5 mW, G1/G2= 243/229 mbar, 1K Pot = 1.69 K / 45±3 mbar.
0913 Begin LHe transfer @ MB = 18.8%
0953 End LHe transfer @ MB = 91.2%
1025 Recalibrate HV. New HV calibration file: HV_DCRC2_control_cals_500V_200721.txt at /home/hep/cdmssoft/repositories/MidasDAQ/online/scripts/pysequencer/HV_calibrations. Only a little different from the previous calibration.
1030 MB 91.0%
1040 Fill LN2 cold trap bath
1045 Matt leaves lab

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