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    User name brads

    Log entry time 01:59:59 on December 09, 2008

    Entry number 252653

    keyword=BB Cerenkov LED runs with (and without) beam

    <p>
    This is a list of BB Cerenkov LED runs taken with and without beam.
    <p>
    The first set of runs listed was taken without beam on Dec. 2 (Runs
    4114--4126).
    <p>
    The second set of runs was taken with beam currents of 0.2, 1.0, 2.0,
    6.0, 12.0 uA (Runs 4309--4331).
    <p>
    <pre>
    Tue Dec 2 15:04:55 EST 2008

    RHRS-side PMTs turn on only (11 -- 20)
    Pulser fanned out to LEDs on PMTs 1, 5, 10 (on beamline side).

    HP 8116A pulse generator
    - postive going pulse
    - rate set to 1kHz
    - nominal width set to 10ns on front panel, unless noted
    - front-panel LIL amplitude set to 0.0V
    - nominal front-panel HIL amplitude listed below

    NOTE: (*) prefixed lines were re-measured later (Tue Dec 9 01:53:11 EST
    2008)

    (-) prefixed lines had been measured with the scope in
    "BW limit, 20MHz" mode (on Tue Dec 2 15:04:55 EST 2008).
    This distorted the shape displayed on the screen.

    Run 4114
    * 4.0V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    - 2.0V amplitude, 15ns FWHM pulse to LED input PP 33 upstairs.
    4.2V setting on pulse generator, 10ns pulse

    Run 4115
    * 4.0V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    4.4V setting on pulse generator
    - 2.1V amplitude, 15ns FWHM pulse to LED input PP 33 upstairs.

    Run 4116
    * 4.3V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    4.6V setting on pulse generator
    - 2.2V amplitude, 15ns FWHM pulse to LED input PP 33 upstairs.

    Run 4117
    * 4.8V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    5.1V setting on pulse generator
    - 2.5V amplitude, 20ns FWHM pulse to LED input PP 33 upstairs.

    Run 4118
    * 5.8V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    6.1V setting on pulse generator
    - 3.0V amplitude, 20ns FWHM pulse to LED input PP 33 upstairs.

    Run 4119
    * 6.7V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    7.1V setting on pulse generator
    - 3.5V amplitude, 20ns FWHM pulse to LED input PP 33 upstairs.

    Run 4120
    * 7.5V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    8.0V HIL setting on pulse generator
    - 4.0V amplitude, 20ns FWHM pulse to LED input PP 33 upstairs.

    Run 4121
    - Pulser turned off
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4122
    * 7.8V amplitude, 12ns FWHM pulse to LED input PP 33 upstairs.
    8.0V HIL setting on pulse generator, 13.5ns width setting
    - 5.0V amplitude, 25ns FWHM pulse to LED input PP 33 upstairs.

    Run 4123
    * 7.8V amplitude, 16ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 16.4ns width setting
    - 6.0V amplitude, 25ns FWHM pulse to LED input PP 33 upstairs.

    Run 4124
    * 7.8V amplitude, 21ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 22.4ns width setting
    - 7.0V amplitude, 25ns FWHM pulse to LED input PP 33 upstairs.

    Run 4125
    * 7.9V amplitude, 35ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 35.4ns width setting
    - 8.0V amplitude, 35ns FWHM pulse to LED input PP 33 upstairs.

    Run 4126
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting
    - 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs.


    ------------------------------------------------------------
    Mon Dec 8 23:53:14 EST 2008
    ------------------------------------------------------------

    -----------------------
    Current: 1.0 uA
    -----------------------
    Run 4309
    - Pulser turned off, pedestal run @ 1 uA
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4310 -- Junk, PMTs turning on

    Run 4311
    - Pulser unplugged from LED, pedestal run @ 1 uA
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4312
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting

    Run 4313
    * 7.8V amplitude, 16ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 16.4ns width setting


    -----------------------
    Current: 0.2 uA
    -----------------------
    Run 4314 -- JUNK, bogus prescales

    Run 4315
    - Pulser unplugged from LED, pedestal run @ 0.2 uA
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4316
    * 7.8V amplitude, 16ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 16.4ns width setting

    Run 4317
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting

    -----------------------
    Current: 2.0 uA
    -----------------------
    Run 4318
    - Pulser unplugged from LED, pedestal run @ 2 uA
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4319 -- JUNK, wrong prescales

    Run 4320
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting

    Run 4321
    * 7.8V amplitude, 16ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 16.4ns width setting

    -----------------------
    Current: 6.0 uA
    -----------------------
    Run 4322
    - Pulser unplugged from LED, pedestal run @ 6 uA
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4323
    * 7.8V amplitude, 16ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 16.4ns width setting

    Run 4324
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting

    Run 4325
    * 5.8V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    6.1V setting on pulse generator, 10ns width

    -----------------------
    Current: 12.0 uA
    -----------------------
    Run 4326
    - Pulser unplugged from LED, pedestal run @ 12 uA
    - T8 only (ie. pure ped run, no beam, no LED)

    Run 4327 -- JUNK, wrong prescales

    Run 4328
    * 5.8V amplitude, 10ns FWHM pulse to LED input PP 33 upstairs.
    6.1V setting on pulse generator, 10ns width

    Run 4329
    * 7.8V amplitude, 16ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 16.4ns width setting

    Run 4330
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting
    -- Trippy beam for most of this run

    Run 4331
    * 8.0V amplitude, 45ns FWHM pulse to LED input PP 33 upstairs, pulse now
    squaring off
    8.0V HIL setting on pulse generator, 45.4ns width setting
    -- no beam for first 20k events

    Tue Dec 9 01:54:01 EST 2008
    </pre>