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#### User name hyde

#### Log entry time 12:27:51 on October 26, 2010

#### Entry number 336817

#### This entry is a followup to: 336680

keyword=S0 Efficiency

S0 appears to be >99% efficient except for L.tr.x<-0.6
Run 7711 has T3 and T4 triggers

cut definitions
TCut cGoodVDC = "L.tr.n==1&&abs(L.tr.x)<1.";
TCut cGoodAngles = "abs(L.tr.tg_th)<0.1&&abs(L.tr.tg_ph)<0.05";
TCut cTarget = "abs(L.tr.tg_y)<0.1";
TCut cCleanTrk = cGoodVDC&&cGoodAngles&&cTarget;

L.tr.x and .y distributions for all events and for events
with L.s0.nlthit==0 (Blue)
and L.s0.nrthit==0 (Red)

S0 is a little shorter than focal plane, and cuts negative y also,
but is this a useful region of focal plane?

A copy of this log entry has been emailed to: hisham@jlab.org

Figure 1

Figure 2