leps collaboration meeting in taiwan update of tpc analysis (ii)
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LEPS Collaboration Meeting in Taiwan
Update of TPC Analysis (II)Jia-Ye Chen
2006.1.12
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Contents
Time Projection ChamberParticle IdentificationGet Pulses and Form ClustersSet Hits and Find Track CandidatesLayer-Clustering (0.46-rk) and Wire-Clustering (0.47b)Wire-Clustering AlgorithmFuture Work -
Time Projection Chamber
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Particle Identification Algorithm
Pulses(Flash ADC)
Form Clusters
Set Hits
Find Track Candidates
Obtain Flight Length and Momentum
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Get Pulses and Form Clusters
Get PulseForm Cluster -
Set Hits and Find Track Candidates
Set Hits (0.46)Find Track Candidates2D
3D
Hit Position
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Layer-Clustering
Layer Wire
and Wire-Clustering -
Layer Clustering
R32273 Event 1 Layer 0 -
Layer Clustering
R32273 Event 1 Layer 1 -
Wire Pulses
R32273 Event 1 -
Wire Clustering
R32273 Event 1Same Layer
Cross Layer
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Wire Clustering
R32273 Event 1 Wire 50 -
Find Track Candidate
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0.46 W/O CorrectHit
0.47 W/O Tracking Raw Hits -
R32273 Event 1
Raw Hits and Tracking HitsTracking Hits
Raw Hits
x
x
y
y
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Double-Counted Hits
x
y
z
x
y
z
Transverse : x and y Longitudinal : z -
Hits Separation
dx
dy
dz
dx
dy
dz
dx
dy
dz
(mm)
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Pile-up Pulses
Z
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Wire-Clustering Algorithm
High ADC pulse as SEEDFind Time-Overlapped pulses on the same or neighboring layers, if time-overlapped pulses on the same layer, ask for neighboring pads.A cluster requires that more than 3 pulses and 3 pads.Hits which their separation, Z, is smaller than 1 mm, are double-counted hits. Small max-ADC hit will be dropped. -
Tracking Enhancement
1 hit per layer per track
More than 1 hit per layer per track
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Future Work
To merge Layer-Clustering and Wire-Clustering.To extend tracking algorithm, # of hits per tracks will greater than 14.Hope : Kick eventPulses
(Flash ADC)
Form Clusters
Set Hits
Find Track Candidates
Obtain Flight Length
and Momentum
)
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