30 likes | 179 Views
Setup to look at the HV current on side walls of HPD (diode is isolated from this current path). dark. HV. PC. (Black wire). HPD HV gnd. diode. 10 M. Voltmeter 20 Mohm. V. HV gnd. It is best to take of AL ring for this measurement because the ceramic carrier is also
E N D
Setup to look at the HV current on side walls of HPD (diode is isolated from this current path) dark HV PC (Black wire) HPD HV gnd diode 10 M Voltmeter 20 Mohm V HV gnd It is best to take of AL ring for this measurement because the ceramic carrier is also Ground (connected to black wire)
HV current to Ground through ~5Mohm Previous measured at CERN