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    User name Jin Huang

    Log entry time 20:40:39 on June 26, 2010

    Entry number 328499

    This entry is a followup to: 328374

    Followups:

    keyword=More Optics Stuff

    New optics runs are being taken. Plots from optics target is attached to
    this log.
    
    Run type: LHRS sieved run. p=0% (1.1600GeV). PREX optics target. Raster
    on/off
    
    * elastic peak is clear shown at ~0%
    * Sieve is mostly clear for each carbon foil
    * two carbon foils are seen (central, central + 7.5cm upstream). When
    raster increase to as large as 7x7MCC, edge of Al dummy target is also in
    beam.
    * Vertex reonstruction need to be improved to see clear foils in 1D vz
    plot. However, foils could be identified through 2D plots. 
    


    A copy of this log entry has been emailed to: yqiang, vasulk, camsonne



    Raster off run 1166: VDC hit; tg_th:tg_ph; dp and Vz (which is need further work)



    Raster off run 1166: Separation of carbon foils in 2D plots. Each strip is one foil. 4 combination of 2D plots are generated



    Raster off run 1166: 5th and 6th plot are Sieve for each carbon foil.



    Raster on run 1163. An additional strip is shown on 2D plot showing hit on another foil at large raster (Al dummy, cross checked with spot++).