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    User name D. Parno

    Log entry time 14:52:03 on February 23, 2009

    Entry number 262906

    keyword=Syncroc studies: L1A vs Clock for Run 1662

    Run 1662 was taken during the owl shift on 21 Feb. Fig. 1 shows the ROC synchronizations for the first 50,000 events, including several large gaps. Fig. 2 shows L1A:clockcnt for the first 1,000,000 events.

    In Fig. 2, we note that the structure at clockcount ~ 400,000 is probably a beam trip, since L1A drops all the way to zero. However, we do not understand the structures deviating from a flat line at the beginning and middle of the run.

    The part of the run plotted in Fig. 1 corresponds to the clockcount <~ 25,000 in Fig. 2.

    A copy of this log entry has been emailed to: brads, kalyan, flay, posik, moffit

    Figure 1

    Figure 2