Frank L. H. Wolfs
Department of
Physics and Astronomy, University of Rochester
Time-delay Matching
¥Relies on our capability to monitor the centroid of a
distribution that is 750 ps wide or wider.
¥The raw timing distribution are vertex dependent and
thus need to be corrected for this dependence (done during DV).
¥This procedure works well for the T0 counters were we
have a no problem with statistics, and path length corrections (due to vertex
variations) are simple to apply.
¥The situation with the TOF is more complicated for a
number of reasons:
¥The path length variations due to vertex
variations are hard to correct for using the raw data.
¥For a narrow vertex region, the path
length will depend on the emission angle and momentum of the particle (which
will widen the distributions).