Notes - instrumentation/Beam physics Meeting March 16, 2005

Agenda:

    1) Main Injector Batch by Batch Intensity(BBI) Monitor  - Alexei Semenov
    2) TeV Synchlight Status - Randy
    3) Tev FW status - Nathan

Action Items:

 MI BBI
    1) Get the BBI output for NUMI beam permit setup
    2) Validate calibration with respect to DCCT.

 Synclite

     1) Study new camera and, if waarented, replace existing
        cameras with new ones.
     2) check gain scale switch on pbar camera and remeasure
        relevant distances when there is a appropriate
        downtime
     3) Seriously crosscheck with flying wires since emittance
        are now about as good as Randy knows how to make them.
     4) Vladimir expressed interest in seeing the raw
        distributions to check for off axis ellipses due to
        coupling.

 Tev FWs

     1) Push on getting the wires flown during stores
     2) Add standard array for centroids to OAC.
        (average two passes and 37 elemts with (0) element
         as the (intensity weighted?) average. What about
         amplitudes?
 Other

     1) Consider providing for "SBD-Like" viewers for
        flying wire profiles that are stored on log files
        and the synclite 2-d images.
     2) corrected raw data button for Tev SBD.
     3) something about the wall current monitor in MI?

Details:

     1) Mi Batch by Batch intensity Monitor - Alexei

         Alexei's talk is in the doc db as doc xyz.

     2) Sync lite

         a) The variation of sigma with intensity has been measured
            and a correction is being applied in the fronteend.
            Plot can be found where?)
         b) Randy varied the camera distance from the lens for both
            p and pbar.  He showed plots of the horizontal and
            vertical beam sigmas as a function of the camera
            longitudinal position for data and the simulation.
            There is very good agreement between data and simulation.
            Salient features are:
               1) the horizontal and vertical sigmas don't show
                  the same features. It's tricky to do this
                  correctly.
               2) for pbars, the full dipole and half dipole edges
                  have different focal points.
               3) The proton focal point is at the very limit of the
                  camera's adjustment.
               4) He set the cameras where the simultion indicated,
                  and, for pbars, for the half dipole light.
               5) When possible, he wants to measure the distances
                  in the tunnel one more time.
         c) The repaired new camera is back and Randy will study it
            the bench to see if it has the same variation of
            sigma with intensity as ones in the tunnel.
         d) There is a gain selector switch on the cameras(?) that is
            prably set differently for pbars and protons.  This could
            explain the factor of 4 difference in gain for the
            two systems - something to check next time there is a
            tunnel access.

     3) Flying wires