Given that I hope we are now moving towards stable operation, here is the current status of detectors for run0024 on...
Inside pocket (x86l-124, 0x200)
SiPad #1: Suspected short. Biased but linear IV response. Very long charge collection time. n-side removed from tigger mask.
SiPad #2: Bias at +150V. High leakage current, but operating normally.
SiPad #3: Suspected short. Bias disconnected at MSI-8. Removed from trigger mask.
SiPad #4: Bias at +150V. High leakage current, but operating normally.
SiPad #5: Bias at +150V. High leakage current, but operating normally.
SiPad #6: Bias at +150V. High leakage current, but operating normally.
DSSD : Bias at -100V. High leakage current, but operating normally. Traces in ch2 often look quite strange.
Crystal : Bias at -140V. High leakage current, but operating normally.
Outside pocket (x68l-131, 0x100)
- Pocket actuator not responsive in device control. Currently in parked position.
SiPad #1: Bias at +100V. High leakage current, but operating normally.
SiPad #2: Bias at +100V. High leakage current, but operating normally.
SiPad #3: Bias at +100V. High leakage current, but operating normally.
SiPad #4: Suspected short. Bias disconnected at MSI-8. Removed from trigger mask.
SiPad #5: Bias at +100V. High leakage current, but operating normally.
SiPad #6: Bias at +100V. High leakage current, but operating normally.
DSSD : Bias at -100V. High leakage current, but operating normally. Traces in ch2 often look quite strange.
Crystal : Bias at -140V. High leakage current, but operating normally. Leakage current steadily increasing.
There is something we still don't understand on the outside pocket because when one detector is biased off, the other leakage currents flip polarity... |