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    User name D. Lhuillier

    Log entry time 21:22:09 on June 9,2004

    Entry number 125199

    keyword=Detector work during access

    Brian started to change the cable configuration so that a thick twinax cable connects the detector signal to the HAPPEx ADC. Ready in the left arm, right arm to be done tomorrow. Previous tests showed the pedestal width is reduced by a factor 5 with the thick cable (from 15 down to 3 ADC channels).
    Fernando Barbosa and I did some debugging on the diode setups of both electron detectors. The left arm setup is fully operational. The saturation observed in counting mode (-600 mV) yesterday is fixed. It was due to a bad setting of the switch power supply.
    The right arm diode setup seems to send the wrong polarity to the diodes and is not working yet.