Mon, 6.07.2026 10:00:00 (A.Laszlo):
HV jumper settings: GRC-1 all SenseWires ON (low multiplicity setting -- unchanged), GRC-2 all SenseWires ON (low multiplicity setting -- unchanged).
Gas pressure reducers: GRC-1,2 at about +0.5 bar above atmospheric pressure, both for Ar and for CO2.
Gas flow: GRC-1,2 at 4.0 l/h : 0.8 l/h (Ar:CO2).
Gas stability: checked stability of flow a few times with a few hours of waiting time.
Gas safety bubbler: checked that the safety bubbler at the GRC inlet against overpressure is _not_ bubbling.
Voltages: Udrift=-20V (the HV supply cannot issue active -0V), Usw=1600V. Isw(spill,target-out)=?nA, Isw(nospill,target-out)=?nA.
Safety settings for SenseWire HV:
HV max setting: Umax=1620V.
HV ramp setting: DU/Dt(up)=11V/s, DU/Dt(down)=11V/s.
HV trip setting: Imax=0.6uA, tmax=1s.
Safety settings for Drift HV:
HV max setting: Umax=-30V.
HV ramp setting: DU/Dt(up)=5V/s, DU/Dt(down)=5V/s.
HV trip setting: Imax=5uA, tmax=2s |