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    User name A. Camsonne

    Log entry time 08:43:13 on May 04, 2006

    Entry number 172904

    This entry is a followup to: 172900

    keyword=Charge asymmetry change and Half wave plate change during run 4434

    it looks like there was a miscommunication between MCC and Hall B, MCC did not wait to change the half wave plate and switched it but put it back.

    # 1321113 04-May-06 08:05 C_Humphry LOGENTRY Hall B: requests 1/2 wave plate inserted # 1321112 04-May-06 07:55 C_Humphry LOGENTRY Hall B : requests 1/2 wave plate removed # 1321111 04-May-06 07:53 C_Humphry LOGENTRY Hall B: requests 1/2 wave plate inserted

    http://opweb.acc.jlab.org/CSUEApps/elog02/elog_item.php?elog_id=1321113 http://opweb.acc.jlab.org/CSUEApps/elog02/elog_item.php?elog_id=1321112 http://opweb.acc.jlab.org/CSUEApps/elog02/elog_item.php?elog_id=1321111

    which confused the charge asymmetry feedback. This affects end of run 4434. Not sure if we can determine the Half Wave plate status with EPICS. To be safe we should only take the first half of this run.