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User name xqian
Log entry time 21:39:46 on December 07, 2008
Entry number 252455
Followups:
keyword=I intepret wrong.... It is not punch throughIn order to figure out whether the enhancement we saw at the top of preshower-shower, chamber system. I did a MC.
The MC can reproduce the shape of the spectrum observed in the chamber reasonably.
However, no-puch-through events are observed.
In this case, I conclude that the problem is the pre-shower PMTs.
Fig 1. all (data)
Fig 2. Good electron (data)
Fig 3. MC (with pi^+ and pi^-)
A copy of this log entry has been emailed to: jpchen@jlab.org,jiang@jlab.org,kalyan@jlab.org
Figure 1
Figure 2
Figure 3
