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User name R. Michaels
Log entry time 10:13:02 on July 3,2010
Entry number 329603
keyword=coincidence search, but problem
Here is a search for coincidences for run 1510 with holey C12
target. None are found. But there was a mistake: the T4 definition
was left as an "or" of T1, T3 instead of an "and".
I suppose it had been left in a test configuration for which "or"
Bogdan fixed this module upon access. We should see coincidences
in the T1 spectrum for trigger 6, at the approximate location indicated
in the top left histogram (ct1f6). Now we'll see with the beam.
BTW, I can explain all the features in these plots, I think.
e.g. for T1, the peak on the left side (corresponding to later times)
is a self-timing peak for when T1 slides late and defines the
trigger time. The T2 and T5 are correlated to T1, so they show
the same features. The T3 peak is caused by a correlation to
the R-HRS Gas Cerenkov. Recall, the R-Cer defines the timing of
T6. Also, T4 is highly correlated with T6.
So, one should look at the macro "coinc.C" and the T1 histogram.