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    User name Jin Huang

    Log entry time 18:02:17 on November23,2009

    Entry number 302128

    This entry is a followup to: 302123

    keyword=LHRS Optics Checks OK

    A simple test is performed on LHRS optics after polarity change. It seems OK.

    First plot: focal plane ph angle VS react Z for run 25714, optics target with positive polarity. The second strip is stronger than other because it's also hitting on one of the Al dummy foil (discussed in HALOG 298230).

    Second plot: same plot for negative polarity run 25334. By comparing with 1st plot, LHRS vertex reconstruction remain similar after the polarity change.

    FIGURE 1

    FIGURE 2