¥Our alignment procedure
for the T0 counters clearly does not work.
¥It appears that our T0
time distributions are dominated by secondaries, and that the actual
secondaries effect different counters in different ways.
¥In principle we can
obtain the collision time from the T0 OR.
However, this will limit the collision time resolution to about 160
ps.
¥We have developed and
fine-tuned most procedures to obtain PID with the TOF. The PID spectra obtained from PR01 are
clean, and we are now optimizing the slewing corrections using the tracked
particles.