SOMEBODY TURNED ON Larm s0 HV

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User name mcnulty

Log entry time 14:15:46 on September25,2009

Entry number 291592

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keyword=SOMEBODY TURNED ON Larm s0 HV

I went to turn on Larm s0 HV and saw that all the HV channels in the slot were on!!!!!!!!!!! And were on for 100uA running. This is crazy. Why/How did this happen? There is no HALOG about it at all! The only thing we know is that I turned them off yesterday at ~3pm after the phase advance test. So sometime between now and then, somebody decided to turn all the channels on (not just our s0 channels. I don't know what the other channels are connected to...they are part of the gas cerenkov system...I know that ch1 and ch7 are s0 and ch9 is LhapDet, and ch11 is the parasytic PVDIS det...all the other channels are not hooked up to anything to my knowledge.

Perhaps we need to snapshot these HV GUI's periodically to keep an eye on it.

I think we may have an s0 disaster on our hands. at 20uA it is only giving us 9kHz and it should be 100kHz. We may need to repair it this coming Tuesday before we can do another Q2 or backgroud study.