August run plan as of 2002-08-23.

Nominal settings (from Marc's posting):

	HV DC=1900V, threshold=-125mV;

	Outer PC: HV=2050V, threshold= -300mV for ganged wires, 
				       -250mV for central wires;

	Target PC: HV=2000V, threshold=-150mV


 0. Before ramping up the magnet: verify HVs and thresholds.
    (done)

    Pulser data: see all the channels.
    (done)

    Make sure the new DS scintillator work.
    (done)    

    Set up additional discriminators with low
    thresholds to get M1L and M2L without disturbing M1 and M2.
    (done)

    Beam tune = 120MeV/c spray pions, 
    Gas degrader=(does not matter here, the same as for the next item),
    Trigger=DS

    Take a control sample of t0 and alignment data.
    6-10  2GB (10^6 events) runs.
    (done)


 I. Ramp to 2T slowly and take some stopped muon data at several rest stops!

    Beam tune = m13dev_29p4_all.snap (restore slits as well)
    Gas degrader=40%He
    Trigger=M

 II. Field on efficiency and t0 check:

    Beam tune = 120MeV/c spray pions: 
    restore slits from m13dev_120_all_slits.snap,
    then restore magnets from m13dev_120_all_spray.snap.
    Adjust rate if necessary by proportionally varying F0V and F0H.

    Gas degrader=100% (Does not matter here. Set to 100% and take data without waiting),
    Trigger=DS

    run 120 MeV/c spray (?) pions through the detector, illuminating as
    many wires as the field will permit. It may not be possible to get them
    all. However, if the wires that are illuminated are all unchanged, as
    expected, that's okay. Take data with the DS trigger to cross check that
    the efficiencies and t0's are unchanged with field on.
    ###1 day### -> 1 day total


 III. Systematics studies

    Beam tune = (multiple),
    Gas degrader=100% He

    Trigger= M1L*M2L

    a. Study the positron "kinks and deltas". Find a channel tune that brings
    beam positrons into the spectrometer with a moderately large p-perp.
    This may imply mis tuning B2 relative to B1. Then take 10M beam positron
    events each at 30, 35, 40, 45, 50 MeV/c. Ideally, use the low-threshold
    M trigger for this to ensure that the positrons see minimum mass prior to
    the detector.  ***This should be possible!***

    If we must use the DS trigger, the number of events should
    be increased so that we end up with ~10M/energy that project back to the
    trigger scintillator. Assume 8 hours (i.e., one day shift) of playing
    with the beam, followed by runs at 1kHz of low-threshold "muon" triggers.
    ###1 day### -> 2 days total



    Tune the surface muon beam to stop as close to the center of the
    target as we know how to, without a lot of screwing around.
    (NOTE: This is NOT meant to be a PACT tuning or beam stopping
    study!)

    Beam tune = m13dev_29p4_all.snap (restore slits as well),    
    Gas degrader=40% He, wait for ? minutes.
    Trigger= M

    b0. Quick study of the (clean evts/all evts) vs rate. What's the
   	DAQ limit on the rate for mu decay data?
    
    b.  "high rate" data sample: take a data set with statistics
    equivalent to 20 hours @ 2KHz. 
    ###1 day### => 3 days total
   
    c. Study the rate dependence. Decrease the muon stopping rate to 2
    KHz. (Or by at least factor of 2 if the "high rate" was less than 4KHz).
    Then take a data set with statistics comparable to the previous one. 
    ###1 day### => 4 days total
   
    Beam tune = 29.4MeV/c, rate=?,    
    Gas degrader=40% He
    Trigger= M
 
    d. Study effect of materials in the downstream end of the detector.
    One day of "thin" Lucite, one day with one of the metal plates
    @ 2kHz muon triggers, stopping in the center of the
    target.
    ###2 days### => 6 days total


    Beam tune = 29.4, rate=?, 
    Gas degrader=40% He
    Trigger= M

    f. Devote any remaining time to stopping distribution and PACT
    studies.
      
   
    September 3 at 4AM:
    
       Beam tune = 120MeV/c spray, 
       Gas degrader=whatever is left from before,
       Trigger=DS

    e. Quick check with 120 MeV/c (spray) pion tune that nothing has
    changed. 6-10  2GB (10^6 events) runs.
    (Few hours.)

   
    Beam off: Tuesday September 3 at 8AM.
    After the beam goes off:
   
    g. beta source alignment data.