[d2n-analysis-talk] LHRS Scintillator Timewalk in S1

[David Flay]

Hi Brad,

I've been checking the timewalk in S1, and I wanted to show you the plots
I have been looking at.

I showed you *.pdf files of how the timewalk looks in S2m, and it looks
alright.  However, in S1, I see an extra band at ~ 10 ns later than the
main band... I'm not sure if this is overly significant, when we compare
it to the main band (the events in the main band tend to dominate by a
lot).

What do you think?

Also -- I haven't been able to really separate electrons from pions in the
consideration of the ADC sum (L+R) vs. total energy deposited in the PR. 
Subsequently, I've been examining my electron sample in the GC, and it
seems to be contaminated by up to 5% at some momenta, so I am working on
optimizing my electron sample before I reevaluate the PR efficiency --
this should (hopefully) lead to more consistent results for the PR cut
efficiency.


-------------------------------------------------
David Flay
Physics Department
Temple University
Philadelphia, PA 19122

office: Barton Hall, BA319
phone: (215) 204-1331

e-mail: flay at jlab.org
            flay at temple.edu

website: http://www.jlab.org/~flay
              http://quarks.temple.edu
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