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    User name bertin

    Log entry time 17:43:43 on October 2,2004

    Entry number 132700

    keyword=HV CALO modifications and trigger thresholdthe

    HV CALO modifications
    1) allignement of all HV on the block 65 withe the calibration coefficien determined by C. Ferdi ( elastic scatering data)
    2) encrease the gain of all the pmt by 1.5 .
    HV file wille be precise by C. Ferdi in a following Halog input

    Trigger pedestal adjustement to a value of 8 cx

    1) current tower trigger value 80= 4x15+Tha==>effectif threshols tha=20 cx
    2) with the same effectif threshold and the new HV the desired tower trigger value would be 4x8+20x1.5=62 cx
    3)The threshod beeing 1.4 GeV [from Carlos analyse run 2531 (th=90)
    and run 2569 (th=80)]. To set the threshold at 1.0 GeV th must be set at 32+30x1.0/1.4 = 53