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    User name choi

    Log entry time 22:04:39 on January 6,2003

    Entry number 90646

    Followups:

    keyword=Bad helicity signal

    Earlier problem of helicity from espace has been traced to real hardware problem of bad helicity signal. Instead of having nice square wave oscillating between + and -, we have kind of decay shape. The signal goes to +max and then decays to zero then goes to -min and then decays to zero etc. We (Kent and myself) checked G0 signal from Hall C and they show the same shape and concluded that there is a problem from the source. MCC has been called and they will figure out how to fix it.