• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name jpchen

    Log entry time 19:34:05 on November19,2009

    Entry number 301107

    keyword=two BCM readings diff by 5 uA

    BCM readings for upstream and downstream BCMs diff by significant amount (~5 uA: upstream is 100.5 uA while downstream is 105.5uA).
    Seems MCC reads from the downstream, while the Hall A display is the average of the two readings, taht probably is the reason the beam current we got seems always lower by 2-3 uA.
    Maybe it should be re-calibrated? Or at least put some constants to make them consistent?

    FIGURE 1

    FIGURE 2