User name Wang Xu
Log entry time 05:09:17 on February 16,1999
Entry number 14638
keyword=Mult track studyIf we assume that the mult track is created by spectrum timing resolution,
for h_arm,pobability=400ns*3kHz=0.12%
for e_arm,pobability=400ns*0.3kHz=0.012%.
However,
By using espace,we get
h_arm: 50000*6/2000000=15%
e_arm: 2000*4/1000000=0.8%.
The cut which I use is define/logical
mult_track spec_e.track-2&&spec_e.u1.clus-2 _
&&spec_e.u2.clus-2&&spec_e.v1.clus-2&&spec_e.v2.clus-2.
From ADC spectrum of scinillators, it seems that there are two different energy particle. We may need to understand it to know efficiency and reliability to make one track cuts.By Bob suggestion,the shower counter will be check in futher study.
FIGURE 1
FIGURE 2
