Email from Yongguang:

Date: Thu, 30 Sep 2004 14:09:08 -0400
From: Yongguang Liang 
To: Dave Mack 
Cc: Mark Pitt , Roger Carlini ,
     Jim Birchall , Juliette Mammei ,
     Klaus Grimm , Neven Simicevic ,
     Greg Smith , Allena Opper ,
     Tony Forest , Norman Morgan ,
     Mike Finn , David Armstrong ,
     Shelley Page ,
     Richard Jones 
Subject: New tomographic plots of photon background for Neven's collimator

Hi  folks,

I made some new tomographic plots of the background for Neven's 
collimator. The plots I sent you on Monday is not
correct as I turn off the minitorus but using the  q_weak and minitorus 
field map in my simulation (I forgot to
change the MAGF flag in bash file from 4 to 2) , please drop those 
plots. I posted the new plots and results at

http://www.jlab.org/~yl0094a/Qweak_SCIN/status_report/status_09302004.html


As suggested by Dave, I look at the photons hitting the bar with energy 
 > 1MeV, and calculate the rate and
mean Q^2 of thoes photons. I also look at the rate and mean Q^2 of the 
positrons and electrons. Please read my report.

Best regards,

Yongguang





Youngguang's attachments:


neven_juliette_collimator_side_view.gif

o_x_z_photon_neven_collimator.gif

o_x_z_photon_neven_collimator_large.gif

o_y_z_photon_neven_collimator.gif

May2003Talk.pdf