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    User name Kalyan

    Log entry time 02:44:53 on March 31, 2012

    Entry number 368502

    This entry is a followup to: 368455


    keyword=Third arm rate increase after Moller

    After Moller was finished today the beam was centered with "hole" target. The new BPM values on X changed by about 0.5mm compared to the values before Moller measurement.

    We see 6 times more rate on thirdarm now compared to the rate before Moller measurement (went from 3 kHz to 18 kHz). Which clearly indicates that the beam is hitting something else along with target. We checked this by reducing the slow raster size slowly up to 1.6cm and at this size the rate become normal (3Khz).

    I will see if I can tweak beam positions a little bit to fix this

    A copy of this log entry has been emailed to: slifer,jpchen,camsonne