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

    User name jroche

    Log entry time 16:13:27 on December 12, 2010

    Entry number 344017

    This entry is a followup to: 340834

    Followups:

    keyword=Another jump in the reading of the downstream BCM ?

    It seems that we have lost another 5% in the response of the downstream BCM. The attached figure shows the ratio of the charge accumulated during a run by the signal u3 over the same one by d3. The jump happened during run 9455 (December 10, 7:30 pm). According to the corresponding shift summary nothing notable was happening.

    The table below shows that all signal corresponding to the downstream BCMs have dropped compare to the upstream ones.

    Also note that this time around, the jump is in opposite direction compared to the previous jump (see linked halog).

    APPROXIMATE BCM CHARGES (C)
    
    Run 9450 (before jump)
    BCM u1 : 0.003664       BCM u3 : 0.003574       BCM u10: 0.003572       
    BCM d1 : 0.003661       BCM d3 : 0.003587       BCM d10: 0.003586
    
    Run 9549 (after jump)
    BCM u1 : 0.003652       BCM u3 : 0.003552       BCM u10: 0.003548       
    BCM d1 : 0.003468       BCM d3 : 0.00338        BCM d10: 0.003379  
    





    Figure 1