Email from Allena:

Date: Thu, 30 Sep 2004 17:08:46 -0400
From: allena k opper 
To: Mark Pitt 
Cc: Roger Carlini , Jim Birchall ,
     Juliette Mammei , Klaus Grimm ,
     Neven Simicevic , Greg Smith ,
     Tony Forest , Norman Morgan ,
     Mike Finn , David Armstrong ,
     Yongguang Liang , Shelley Page ,
     Dave Mack , Richard Jones 
Subject: Re: Qweak working group - today's meeting

Hi Gang,

Apparently there was something wrong with my phone and you couldn't hear 
me so I'll summarize my thoughts in this email.

It appears that in order to have a sufficiently high enough FOM 
determined by a defining collimator upstream of the QTOR,  that defining 
collimator also allows in an unacceptably high fraction of inelastic 
electrons.  The only way to get rid of the inelastic electrons without 
reducing any elastic electrons is to eliminate the inelastic electrons 
after they have been separated from the elastic electrons by the QTOR.  
I think I mentioned this at the beginning of the phone call.  This WILL 
be done by the shielding hut if we design the apertures carefully.  
Yongguang has done some work with this and he could do more.  We know we 
will need a shielding hut and I think we should see what we can gain 
from using clever apertures before exploring sculpted detectors.

Allena



_________________________________________________________

Allena K. Opper, PhD
Associate Professor 
Department of Physics and Astronomy
Ohio University                       tel: (740) 593-1982
Athens, OH                            fax: (740) 593-1436
45701  USA                            opper@ohiou.edu