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    User name Ole Hansen

    Log entry time 13:57:57 on July 08, 2010

    Entry number 330812


    keyword=R-arm data in trigger 5?!?

    If I plot the R-arm VDC drift times for trigger type 5, which is supposedly the LEFT arm singles trigger, I get the attached spectrum - very clean, low background, lots of statistics. This cannot be right unless trigger type 5 is not what it is advertised to be ...

    Also, I only get a decent VDC time spectrum in the R-arm for trigger types 4 and 5. Isn't there a R-arm singles trigger? If there is, it doesn't seem to work.

    On closer inspection of the time spectrum attached, it seems like there is double timing in trigger 5 on the R-arm as well: this time, there seems to be a secondary spectrum overlaid shifted by ~100 ns to the right (later times).

    Please check the wiring of trigger 5 and the R-arm singles trigger.

    A copy of this log entry has been emailed to: bogdanw, kalyan, ole

    Figure 1