brat updates

From: Flemming Videbaek (videbaek@sgs1.hirg.bnl.gov)
Date: Wed Dec 06 2000 - 20:44:06 EST

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    A number of changes has been committed to the Brat cvs repository today.
    
    - As a follow-up to the newer description of the tofw having 20+21+21+21 slats inclued in geant yesterday,
    if was necessary to modify the BrMRSTracking module to take this into account. It is not done in an ideal way
    but seem to work as it should (see to test chain in brahms_app/fv_app/Simu/Macro/run_test ...- to be committed later)
    The path length is calculated only for tracks pointing to within the TOFW panels.- BrMRSTracks has added members - a streamer fct was written to deal properly with this.
    - BrMatchModule and BrrMRSTrackingModule has more diagnostic histograms added.
    
    - A mistake was corrected in the newer version of BrMagnetGeometry. The exit plane was not done right!
    
    One conclusion from the study is that path length differences matters very little for MRS. The difference in those
    are less than 2 cm over a wide range of momenta.
    
    regards
        Flemming
    
    ------------------------------------------------------
    Flemming Videbaek
    Physics Department
    Brookhaven National Laboratory
    
    tlf: 631-344-4106
    e-mail: videbaek@bnl.gov
    



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