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Message ID: 47     Entry time: Tue May 13 00:05:39 2025
Author: Konstantin 
Category: Calibration 
Subject: Cooler HV 
The DR measurement was repeated with proper electron cooler settings. Readout of electron cooler HV is not affected by the Grafana failure and can be displayed in Medusa in the View "Log-Display". Measured voltages in Subchain 8 are:

  • 500mA cooler current, file 25-26 (CR DAQ), NTCAP folder closed
    Ohmlabs 205854
    PTB 3.2 205861
    PTB 3.3 205862


  • 250mA cooler current, file no.27 (CR DAQ), NTCAP folder "IQ_2025-05-13_00-18-48"
    Ohmlabs 205812
    PTB 3.2 205819
    PTB 3.3 205819


The cooling energy is 900V lower, since it is compensated by the drift tube HV.
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