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    User name V. Sulkosky

    Log entry time 16:33:52 on October15,2007

    Entry number 208965

    This entry is a followup to: 208919

    Followups:

    keyword=Recabling of S2 Part 2

    For the installation of S2 in place of S2m, the original signal and
    HV cables for S2 could not be found, so the aerogel signal and HV
    cables were used instead.

    The aerogel HV and signal cables are labeled "Had Aero L01" and "Had
    Aero R01" for the left and right PMTs respectively. Only the first 6
    cables for the left and right PMTs were used for S2.

    Here is the cable map for the HV and signal cables for S2:

    Aerogel cable S2 cable
    -------------------------------------
    Had Aero L01 S2-1L
    Had Aero L02 S2-2L
    Had Aero L03 S2-3L
    Had Aero L04 S2-4L
    Had Aero L05 S2-5L
    Had Aero L06 S2-6L
    Had Aero R01 S2-1R
    Had Aero R02 S2-2R
    Had Aero R03 S2-3R
    Had Aero R04 S2-4R
    Had Aero R05 S2-5R
    Had Aero R06 S2-6R

    Note: Additional labels were added to the aerogel cables to indicate
    to which S2 PMT the cable connects.

    I plugged the S2 HV cables into card #1 of the top HV crate on the
    right HRS (Mainframe Id #3). Card #1 was previously used for S2m HV
    cables S2-11L to S2-16L (channels 0-5) and S2-11R to S2-16R (channels
    6-11). Below is the channel map for the S2 HV cables and initial HV
    settings:

    HV Channel S2 HV cable HV Setting (V)
    --------------------------------------------------------
    1.0 S2-1L -1950
    1.1 S2-2L -1950
    1.2 S2-3L -1950
    1.3 S2-4L -1950
    1.4 S2-5L -1950
    1.5 S2-6L -1950
    1.6 S2-1R -1950
    1.7 S2-2R -2150
    1.8 S2-3R -1950
    1.9 S2-4R -2000
    1.10 S2-5R -1950
    1.11 S2-6R -1950

    The HV settings will be fine-tuned by looking at ADC spectra for each
    of the PMTs.