[BLASTTALK] tof efficiencies

From: Chris Crawford (chris2@lns.mit.edu)
Date: Tue Nov 02 2004 - 13:37:59 EST


  being concerned about rates in some of the tof scalers, i decided to
look at the tof efficiency in the recent 32deg and 45deg runs. i looked
at events with good wc tracks in both the left and right sectors, and
then counted the percentage of events missing either the left or right
tof. so this gives information about the efficiency, but is is smeared,
since the efficiency is not as a function of the missed tof, but instead
the paddle number of the corresponding tof in the other sector. the
missing tof events were unprescaled according to the trigger number.
  anyways, the conclusion is that 17 TOF's were at least 98% efficient,
while the rest were at least 93% efficient. this does not take into
account space inbetween the paddles, etc, but gives a general impression
of the performance.
--chris



tof_eff_ntlr.gif

tof_eff_percent.gif

tof_eff_twlr.gif



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