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LEPS Collaboration Meeting in Taiwan Update of TPC Analysis (II). Jia-Ye Chen 2006.1.12. Contents. Time Projection Chamber Particle Identification Get Pulses and Form Clusters Set Hits and Find Track Candidates Layer-Clustering (0.46-rk) and Wire-Clustering (0.47b) - PowerPoint PPT Presentation
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LEPS Collaboration Meeting in Taiwan
Update of TPC Analysis (II)
Jia-Ye Chen
2006.1.12
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 WorkTime Projection Chamber
Particle Identification Algorithm
Pulses(Flash ADC)
Form Clusters
Set Hits
Find Track Candidates
Obtain Flight Length and Momentum
Get Pulses and Form Clusters
Get PulseForm ClusterSet Hits and Find Track Candidates
Set Hits (0.46)Find Track Candidates2D
3D
Hit Position
Layer-Clustering
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 1
Same Layer
Cross Layer
Wire Clustering
R32273 Event 1 Wire 50
Find Track Candidate
0.46 W/O CorrectHit
0.47 W/O Tracking Raw Hits
R32273 Event 1
Raw Hits and Tracking Hits
Tracking Hits
Raw Hits
x
x
y
y
Double-Counted Hits
x
y
z
x
y
z
Transverse : x and y Longitudinal : zHits Separation
dx
dy
dz
dx
dy
dz
dx
dy
dz
(mm)
Pile-up Pulses
Z
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
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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