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    User name A. Camsonne

    Log entry time 11:15:31 on December 02, 2009

    Entry number 304112

    keyword=Compton photon detector looks better with new collimator

    We can run at 1600 V with the new collimator. Laser on and off is clearly seen and anode current is "reasonable" around 80 uA of background.
    Flash ADC plots look pretty good.
    Not sure why I don't get asymmetry in the standard DAQ I will check the cuts
    From the FADC data we have as expected 0 asymmetry in transverse running
    Run 21354Central Crystal ADC Spectrum
    Run 21354Background in Central Crystal ADC Spectrum.
    Run 21354Threshold and Compton Edge.
    Run 21354Raw and Normalized Trigger Rates vs Time
    Run 21354Normalized Counting Rates and Asym vs 20 ADC Bins
    Run 21354Trigger Rate Asym vs Time and averaged for each Photon Polarization State
    Run 21354Beam Intensity and Asymmetries for both Upstream and Downstream BCMs
    Run 21354Electron Beam Horizontal Position at the CIP
    Run 21354Electron Beam Vertical Position at the CIP
    Run 21354Cavity Power and Photon Polarization vs Time
    Run 21354Status of few Relveant Beam Parameters
    Run 21354FADC - Monitor of Run
    Run 21354FADC - Photon Integrated spectrum
    Run 21354FADC - Accumulator 2 Asymmetry
    Run 21354FADC - Accumulator 0 Asymmetry
    Run 21354FADC - Summed Accumulator 0
    Run 21354FADC - Difference in Accumulator 0
    Run 21354FADC - Summed Accumulator 0 vs MPS


    A copy of this log entry has been emailed to: mfriend@jlab.org,paschke@jlab.org,souder@jlab.org,rom@jlab.org