Oct 7, 2005 Minutes

["Michael (Mike) Wood" <mikewood@jlab.org>]

Here are the minutes for the Oct 7, 2005 meeting.

In attendance: M. Wood, M. Ito, E. Clinton, V. Mochalov, Y. Prok, D. 
McNulty, A. Teymurazyan
On the phone :  L. Gan, R. Miskimen, A. Bernstein, D. Dale, A. Gasparian

1) Review of last week's minutes:
Discussion of the Liping's downstream photon profiler.  UNC-Wilmington 
student M. Grissom had done some work in studying the stability of the 
profiler for all runs.  Dustin, Liping, and Mark volunteered to relate 
his work to the survey data taken before the experiment.

2) M. Wood's Progress report
Mike discussed 3 items of work.  They are
    a) veto - conclusion is that the veto is ready to be applied to 
physics analyses to understand its                     efficiencies to 
greater accuracy.  Mike will work with Dustin and Yelena in applying the 
veto cuts
        to realistic analyses of pi0 production and Compton cross checks.
    b) simulations - updates were made to the simulation software 
primsim.  Some additions were the    
        HyCal box, target box, helium bag, and target ladder.  Items for 
future work are the adding the 
        survey data, updating the PS counters,  adding  the I-beams on 
either side of HyCal, and checking
        the beam pipes upstream of the target.
     c) offline monitors - no much has been done.  Mike will meet with 
individual detector groups to get
         histograms to create a single monitor program in the next two 
weeks.

3) Dustin's talk on pi0 accidentals from timing
Dustin showed the results of accidentals in the pi0 angular 
distributions as a result of timing cuts.  He applied a sideband 
background distributions from the timing difference between trigger bit 
9 and TAGM.  The background distribution does not scale with the initial 
pi0 angular distribution data.