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    User name mcnulty

    Log entry time 14:37:23 on August27,2009

    Entry number 286293

    keyword=Pulse height dist for Larm HAPdet

    Preliminary pulse-height distributions for Larm happex detector plotted as a function of VDC x. HV is -1500, run number 24535, 20uA on thick Ta. Po=3.14159. Again, I believe the high event density in the center is a result of the detector being angled across the focal plane while the Ta spectra is not angled; the high rate is where they cross.

    Second plot shows attenuation coefficient for the ADC signal size vs. position along the detector.
    Attenuation = 13.5/555 = 2.4% per meter (This is much different than the Rarm coef of 19% per meter! What's going on here?)

    FIGURE 1

    FIGURE 2