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    User name brads

    Log entry time 21:52:45 on February 17, 2007

    Entry number 193906

    Followups:

    keyword=Calorimeter Run Summary (0.2, 0.5, 1.0, 2.5 uA)

    As of Friday afternoon we should have complete current calibration data for
    0.2, 0.5, 1.0, 2.5 uA (nominal requested current). We will do a few more
    before the run is over (along with a 0L02 cross-calibration.)

    Notes from Arne:
    Here are the results based on a first pass through the data. There might be
    some further optimization...but nothing severe. The <I> is calculated based
    on the integrated charge divided by the exposure time, and is often less then
    the requested current. Q_cal is the integrated charge based on the measured
    temperature rise and beam energy. Q_cup is the integrated charge based on the
    slug instataneous current reading (using the slug as a faraday cup). If
    these two results are within 1% I consider things good. Typically the "cup"
    reading is less then the "cal" reading.

    ---------------------------------------------------------
    Summary of the Calorimeter runs to date.
    ---------------------------------------------------------

    File <I> Q_cal Q_cup
    . uA uCoulombs
    ---------------------------------------------------------
    --- Monday
    calorimeter.2007-02-12.08:54:00 0.6 260.9 257.5
    - Nominal requested current: 1.0 uA
    - BCM log file: BcmLog_110
    - CODA runs: 6248/26223

    --- Tuesday
    calorimeter.2007-02-13.15:47:53 0.4 100.4 98.5
    - BCM log file: BcmLog_111
    - CODA runs: <none>

    --- Wednesday
    calorimeter.2007-02-14.08:23:17 -- ----- ----
    calorimeter.2007-02-14.08:36:55 0.14 ----- -----
    - Nominal requested current: 0.2 uA
    - BCM log file: BcmLog_114
    calorimeter.2007-02-14.08:55:07 -- ----- -----

    --- Thursday
    calorimeter.2007-02-15.08:25:46 -- ----- -----
    - Nominal requested current: 0.2 uA
    - CODA runs: 6428/26406
    - BCM log file: BcmLog_115
    calorimeter.2007-02-15.09:02:15 0.4 141.0 141.6
    - Nominal requested current: 0.5 uA
    - CODA runs: 6430/26408
    - BCM log file: BcmLog_116

    --- Friday
    calorimeter.2007-02-16.09:32:26 0.2 70.9 70.3
    - Nominal requested current: 0.2 uA
    - CODA runs: 6474/26452
    - BCM log file: BcmLog_117
    calorimeter.2007-02-16.11:00:54 2.5 555.0 549.0
    - Nominal requested current: 2.5 uA
    - CODA runs: 6478/26458
    - BCM log file: BcmLog_118


    A copy of this log entry has been emailed to: camsonne@jlab.org