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    User name Ramesh

    Log entry time 04:50:53 on March 15, 2005

    Entry number 141529

    This entry is a followup to: 141281

    keyword=ND P1 adc versus tdc spectrum after adc gate delayed by 12 ns

    The plot shows the adc versus tdc spectrum of Neutron array plane 1 where the variable plotted was

    T->Draw("(NA.nd.p1.la+NA.nd.p1.ra)*0.25:(NA.nd.p1.rt+NA.nd.p1.lt)*0.25","NA.nd.p1.la>0&&NA.nd.p1.la<2000&&NA.nd.p1.lt>0&&NA.nd.p1.lt<2000&&NA.nd.p1.ra>0&&NA.nd.p1.ra<2000&&NA.nd.p1.rt>0&&NA.nd.p1.rt<2000")

    Please compare the same in the halog entry 141281 (click here ).

    The leading edge shifted by 24 channel towards left which is the reflection of delaying adc gate by 12 ns (a channel = 0.5 ns). Is the sharp line in the spectrum a self-triggering or something else?

    A copy of this log entry has been emailed to: gayou@jlab.org, saw@jlab.org,doug@jlab.org,eip@jlab.org,peter@jlab.org,rshneor@jlab.org,jwatson@kent.edu,rsubedi@jlab.org



    Figure 1

    adcVStdc.ps