The track performance as a function of the pad-row configuration has been studied in
the past 
,
Pablo Yepes, STAR Note 207. In that analysis the particle identification capabilities
in L3 with the TOF were presented. Taking into account
the improved tracking results presented in this note,
we consider the PID results presented a lower limit of what should
be achievable.
Figure 1:
Track finding efficiency in TPC sectors as a function of 
for
different pad-row configurations with minimum acceptable resolution of
4.5% (See text for explanation). Errors used in the tracking
are the cluster second moments provided by tdh.
Figure 2:
Track finding efficiency in TPC sectors as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
6 % (See text for explanation). Errors used in the tracking
are the cluster second moments provided by tdh.
Figure 3:
Track finding efficiency in TPC sectors as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
50 % (See text for explanation). Errors used in the tracking
are the cluster second moments provided by tdh.
Figure 4:
Track finding efficiency in TPC sectors as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
4.5% (See text for explanation). Errors used in the tracking are
constant for all hits.
Figure 5:
Track finding efficiency in TPC sectors as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
6 % (See text for explanation). Error used in the tracking are
constant for all hits.
Figure 6:
Track finding efficiency in TPC sectors as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
50 % (See text for explanation). Errors used in the tracking are
constant for all hits.
Figure 7:
Momentum resolution as a function of 
for different TPC
pad-row configurations obtained using cluster second moments
provided by tdh as errors.
Figure 8:
Momentum resolution as a function of 
for different TPC
pad-row configurations obtained using fixed hit errors.
Figure 9:
Momentum resolution as a function of 
in the case
of sector tracking for different
TPC pad-row configurations obtained using the cluster second
moments provided by tdh as errors.
Figure 10:
Momentum resolution as a function of 
in the case
of sector tracking for different
TPC pad-row configurations obtained using fixed errors.
Figure 11: Time needed to reconstruct the tracks in a TPC sector
for a central Lund AuAu event as a function of the inner most
row used in the tracking. The point errors correspond to the
time RMS. The cluster second moments provided by tdh were
taken as errors in the tracking code.
Figure 12:
Track finding efficiency for the full TPC as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
4.5% (See text for explanation). Errors used in the tracking
are the cluster-second moments provided by tdh.
Figure 13:
Track finding efficiency for the full TPC as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
6 % (See text for explanation). Errors used in the tracking
are the cluster-second moments provided by tdh.
Figure 14:
Track finding efficiency for the full TPC as a function of 
for
different pad-row configurations with a minimum acceptable resolution of
50 % (See text for explanation). Errors used in the tracking
are the cluster second moments provided by tdh.
Figure 15:
Momentum resolution as a function of 
for the full TPC
for different TPC
pad-row configurations obtained using cluster second moments
provided by tdh as errors.
Figure 16: Time needed to reconstruct a full TPC
central Lund AuAu event as a function of the inner most
row used in the tracking. The point errors correspond to the
time RMS. The cluster second moments provided by tdh were
taken as errors in the tracking code.