Minutes of the E00102 meeting 
Thursday, September 27, 2001
BR

present:

MA  Mattias Andersson
DH  Douglas Higinbotham
WH  Wendy Hinton
JLR John LeRose
DM  Dave Meekins
BR  Bodo Reitz
AS  Arun Saha

1.) AS presented two slides, which are aimed to guide the MCC
    people. (Please look at our webpage to have a look onto these
    slides)

2.) misc. (mainly items from those slides, and questions from KF)

    Tuesday maintenance: during those four hours, the Hall will remain
    closed if possible

    Hall A Walkthrough: people without walkthrough can only be
    scheduled as third person on shift - JLR will provide a list
    of people with it to BR and the RCs.
    decision about using the Tuesday maintance for safety walkthroughs
    will be made on the fly

    Surveys: the four hours maintenance are probably to short for a
    survey of an HRS. We will have one survey before the start of the
    experiment, one after the experiment. We want to schedule one
    more for the last Tuesday maintenance period during the experiment,
    although this might cost some beamtime.
    The results from the first survey have to be added to the
    MCC database. If AS is not here at this time, BR will take care of.

    Cameras: both cameras will be used to determine the
    spectrometer angle, which also gives additional redundancy for
    the mispointing

    Bulleye-Scan: once during the experiment is sufficient,
    everything else would be "overkill"

    OTR target: Question arouse, whether the information from the
    new OTR target is already included in the data stream.

    --> Who is going to check, what kind of EPICs data is written
        to data-stream. Who will take care of the start- and
        end-of-run scripts.

    Energy Measurements: if there is nothing unforeseen, one ARC
    and one EP measurement are sufficient, together with the online
    Tiefenbach energy measurement

    Beam/Target Allignment: Discussion about the control of
    the right Allignment of Beamposition/direction and Target axis.
    How will we notice, if we a) hit a post with the primary beam
    and b) hit a post with the scattered electrons?
    Time for the horizontal scan foreseen in the present
    commission runplan is probaly to short, because scaler data
    alone will not be sufficient to take care of b).
    If we detect a problem, like a twisted target, we are able
    to rotate the target from outside.
    For checking a) we will rely on pulsed beam, it is too dangerous
    to risk to hit a post with c.w. beam.
    DM suggested to do further waterfall-off runs with the left arm
    only, while changing the angle of the right arm.

    BCM calibration: one good BCM calibration will be fine

    Coincidence--efficency check: hydrogen data from commissioning
    could be used, using software collimation. There is
    also the possibility of using the "small collimator".

3.) BR reports, that there are still too many empty slots in the
    shift schedule, especially for the owl-shifts.
    AS will send another email to the Hall A collaboration