[G14_run] Natalie's talk at 10-12-12 meeting

[Franz Klein]

Reinhard,
we were using the 2.6mm and 2.0mm collimators. We expected something in the order of 35%.



----- Original Message -----
From: "Reinhard Schumacher" <schumacher at cmu.edu>
To: "g14 run" <g14_run at jlab.org>
Sent: Wednesday, October 17, 2012 12:47:17 PM
Subject: [G14_run] Natalie's talk at 10-12-12 meeting

Hi Natalie,
	I liked looking through the slides of your talk last Friday, the one at 
the Collaboration meeting I missed.  There is some interesting new material.

	My immediate question is about slide 13 showing a measurement of the 
beam line transmission function, based, I assume, on an analysis of the 
TAC data from a normalization run.  Why is the transmission efficiency 
as small as 35%?  For g1c and g11 the transmission fraction was much 
larger.  Is it because of the size of the collimator?  If that is the 
case, why did we use such a small collimator?

	Anyone can comment on this of course, not just Natalie.

Cheers,
Reinhard


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Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
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                  Franz J. Klein, Associate Professor 
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