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    User name Jixie

    Log entry time 12:24:36 on April 23, 2012

    Entry number 377999

    This entry is a followup to: 377988

    keyword=Beam scratch the top part of the beam pipe again, keep BPMB_Y=-5.7 will help

    I compared several spot_3 plots for runs from Owl shift till now. I found that the beam will not scratch the top part of the beam pine if BPMB_y<=-5.7 . Since the orbit is now locked at 1H01 and BPMA, It is not so easy to change BPMB. If we can not keep BPMB_y<=-5.7, then I suggest to reduce the slow raster's vertical size by 2 mm.



    A copy of this log entry has been emailed to: jpchen,pzhu,rshneor