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User name A. Puckett
Log entry time 08:04:01 on November21,2010
Entry number 341119
keyword=Owl shift summary
Owl shift was smooth production data taking with one exception: from about 1 am-6 am, the IOC for the DVCS calorimeter ADC crate was frozen. Unfortunately, I did not detect this condition for several hours. Hopefully, this condition will not affect the quality of the data taken during this shift. When I did notice the problem, it took me several minutes to locate the instructions for reboot and to execute a reboot. At the same time, however, I inadvertently also rebooted the DVCS HV crates, resulting in the DVCS calo HVs being turned off briefly while taking data. This HV off condition only affected the last few minutes of run 8936. Judging from the online analysis histograms, the data quality was not affected by the IOC being frozen, but only the experts can ultimately decide that.
Here is the list of runs affected by the frozen IOC, either at the start-of-run, end-of-run, or both:
8934
8935
8936
8937
8938
The condition is totally cleared starting at run 8939.
The full run list for this shift is as follows:
8933 629 k 0.01041 0.01145 60.6 mins 3.0046 uA 14.74%
8934 647 k 0.01068 0.01182 61.4 mins 3.0541 uA 14.71%
8936 623 k 0.01032 0.01132 59.6 mins 3.0248 uA 14.06%
8935 603 k 0.00999 0.01098 57.8 mins 3.0256 uA 14.86%
8938 1621 k 0.00920 0.01014 54.0 mins 2.9840 uA 68.63%
8939 659 k 0.01085 0.01192 65.6 mins 2.8936 uA 13.54%
8940 into day shift