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    User name mack

    Log entry time 16:02:57 on March 17,1998

    Entry number 4566

    keyword=shift summary

    Spent the morning waiting for the beam energy change. That went well.

    Did a bcm calibration. That didn't go well. Not yet analyzed.

    Production data taking on 2D(e,e'pi+) is going well modulo occasional HMS S2 trips. This is the single largest cause of data loss at this point. Check the HV enable cable at the input to HMS Caen crate 1 at next entry.

    Since most runs end with an S2 trip or WC trip, it is very important that the analysis take this into account. I haven't thought about this carefully but that must mean that we should only integrate beam charge while S2 is counting and the tracking efficiency is non-zero. Perhaps one of the 20 Hall C Ph.D. students has already done this and would like to share it with us.