Email from Mark:

Date: Mon, 20 Sep 2004 10:59:50 -0400 (EDT)
From: Mark Pitt 
To: Roger Carlini 
Cc: Jim Birchall , Juliette Mammei ,
     Klaus Grimm , Neven Simicevic ,
     Greg Smith , Allena Opper ,
     Tony Forest , Norman Morgan ,
     Mike Finn , David Armstrong ,
     Yongguang Liang , Shelley Page ,
     Dave Mack , Richard Jones 
Subject: Qweak working group - previous/next meeting


Hi folks,

This email is intended to set the time of our next meeting, and it 
contains a short list of things we agreed to do by that meeting.

1. Next meeting: Mike Finn has a conflict with our usual Thursday meeting 
time, so I would like to pick a time that all interested people can agree 
on (at least for the next few weeks).  To be concrete, I propose:

Thursdays at 4:00 - 5:30 PM Eastern time
OR
Fridays at 3:45 - 5:00 PM Eastern time

If you have a conflict with either of these, please let me know by noon 
Eastern tommorrow (Tuesday) so I can announce the time for this week.

2. Things to accomplish by next the meeting:

a) Neven will generate the inelastic/elastic separation plot for the 
downstream collimator (preferably a 2D plot and the 1D projection like Jim 
did for the modified Boston collimator).  This will allow a direct 
comparison between the modified Boston and downstream collimator for the 
quantities we care about (elastic/inelastic separation, Q2 distribution, 
count rate, mean asymmetry, FOM).

b) Jim will check his rates with Richard's radiative corrections code 
turned on for comparison with Yongguang's rates (for the modified Boston 
collimator).

c) Juliette will determine what mini-torus current is needed to obtain 
adequate Moller suppression with the downstream collimator.  For that 
mini-torus setting she will generate the Q2 distribution plot, rate, 
asymmetry, and inelastic/elastic separation.

d) Roger and Neven have both pointed out that for the downstream option, 
it is important to check that the main detectors can't see "line of sight" 
the collimator edges.  We didn't discuss this much at the Friday meeting.  
Hopefully Neven can look into this too, but if he doesn't have time we 
need to line somebody up at the next meeting who can look into it quickly.

I'll send out some more detailed minutes of the Friday meeting, but I 
wanted to mention one thing we discussed at the end. It was the consensus 
of the people at the meeting on Friday that we need to converge on a 
reference design fairly soon because of the upcoming proposal revision and 
the fact that many other things (detector dimensions, etc.) depend on this.  
We agreed that we would try to come to a decision by Oct. 1.  I think 
after this week's meeting we'll have a good sense of how realistic this 
is.

Thanks,
Mark

--------------------------------
Mark Pitt
Department of Physics
Virginia Tech
Robeson Hall
Blacksburg, VA  24061-0435
Phone: (540) 231-3015
Fax:   (540) 231-7511
e-mail:  pitt@vt.edu
--------------------------------