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    User name E.Chudakov

    Log entry time 20:00:18 on November30,2006

    Entry number 189598

    keyword=Left arm detector coordinates

    Jack and I made rough measurements of the relative Z-positions of the S1, S2 centers and the Pion Rejector front face: S2-S1=71.5", PiR-S2=53.5". The accuracy is about 0.5". Comparing the results with the database used:

    
Detector  DB      updated
    
S1       1.29   stays at 1.29
    
S2       3.14   3.10 
    
PiR1     3.75   4.46


    The is a 4 cm difference in the S2-S1 distance.
    For the moment, I suggest to keep the old S1 and S2 coordinates, but move PiR1 to 4.50m and PiR2 to 4.65m. The new DB directory is 20061130.