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User name ycwang
Log entry time 12:49:50 on January 16, 2009
Entry number 256338
This entry is a followup to: 256322
keyword=LHRS gas chrenkov needs to be checkedI checked the database as which Vince suggests between /20090106/ and /20081116/ for LHRS gas cherekov {diff ./20090106/db_L.cer.dat ./20081116/db_L.cer.dat}, they are the same, but the plot for the two period are different, and Xin does not think there are more positrons, it should be true if I use LHRS gas Cherenkov to check Aerogel 1, it influences A1 too much, it seems that the gas Cherenkov is fired by pions and proton now as the following plots (am I right?). so I think the LHRS gas chrenkov detector needs to be checked.
A copy of this log entry has been emailed to: vasulk@jlab.org, segal@jlab.org, jiang@jlab.org},jpchen@jlab.org
Figure 1
Figure 2
