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    User name R. Michaels

    Log entry time 12:17:53 on January 3,2014

    Entry number 385895

    keyword=HRS Scaler Status

    Present status of Scalers on HRS.



    The scheme we need is explained in fig 1.

    What exists:

    1. All 7 units function on both HRS, see fig 2. The VME readout code works. xscaler and other software (explained in fig 1) show the data.

    2. Cabling from detectors is partially done.

    What needs to be done:

    1. Set up normalization data (triggers, BCM, L1a, etc) and the gate from trigger supervisor. Also need a clock to normalize the rates.

    2. Helicity scaler receives a copy of all normalization data. Helicity assumed to be "in time" for now. We don't have the helicity signals on HRS yet. I guess GMp (R-HRS) may not want a helicity scaler ?

    3. Possible rearrangement of scalers -- there's an imbalance between the two arms. Does it matter ?


    FIGURE 1

    FIGURE 2