Email from Dave:

From mack@jlab.org Fri Sep 17 11:31:31 2004
Date: Mon, 13 Sep 2004 11:03:40 -0400 (EDT)
From: Dave Mack 
To: Roger Carlini 
Cc: finn@physics.wm.edu, 'Neven Simicevic' ,
     'Jim Birchall' ,
     'Juliette Mammei' , 'Klaus Grimm' ,
     armd@jlab.org, 'Mark Pitt' , 'Allena Opper' ,
     'Greg Smith' , 'Norman Morgan' ,
     'Mike Finn' , 'Yongguang Liang' ,
     'Shelley Page' ,
     'Tony Forest' 
Subject: Qweak- Collimator Working Group


	Roger et al,

	It appears that, as long as the defining collimator is farther
than about 100 cm from the target center, there is no hypersensitivity of
Q^2 to the longitudinal alignment tolerances. So any of the collimator
scenarios which have been presented are satisfactory from this point of
view, and we don't have to worry about confusing stream boiling with new
physics.

	Notes are attached. 

	regards,

	Dave

	

    [ Part 2, ""  Application/PDF  260KB. ]
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Dave's attachment:


collimator_Z_sensitivity.pdf