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LEPS Collaboration Meeting in Taiwan Update of TPC Analysis (II)

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)

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LEPS Collaboration Meeting in Taiwan Update of TPC Analysis (II)

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  1. LEPS Collaboration Meeting in TaiwanUpdate of TPC Analysis (II) Jia-Ye Chen 2006.1.12

  2. 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) • Wire-Clustering Algorithm • Future Work

  3. Time Projection Chamber

  4. Particle Identification Algorithm

  5. Get Pulses and Form Clusters • Get Pulse • Form Cluster

  6. Set Hits (0.46) Find Track Candidates Set Hits and Find Track Candidates 3D 2D Hit Position

  7. Layer-Clustering and Wire-Clustering • Layer • Wire

  8. Layer ClusteringR32273 Event 1 Layer 0

  9. Layer ClusteringR32273 Event 1 Layer 1

  10. Wire PulsesR32273 Event 1

  11. Wire ClusteringR32273 Event 1 Cross Layer Same Layer

  12. Wire ClusteringR32273 Event 1 Wire 50

  13. Find Track Candidate

  14. 0.46 W/O CorrectHit0.47 W/O Tracking Raw Hits

  15. R32273 Event 1Raw Hits and Tracking Hits y y x x Raw Hits Tracking Hits

  16. Double-Counted Hits y y z z x x • Transverse : x and y • Longitudinal : z

  17. Hits Separation dx dy dz (mm) dz dy dz dx dx dy

  18. Pile-up Pulses ΔZ

  19. Wire-Clustering Algorithm • High ADC pulse as SEED • Find 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, ΔZ, is smaller than 1 mm, are double-counted hits. Small max-ADC hit will be dropped.

  20. Tracking Enhancement 1 hit per layer per track More than 1 hit per layer per track

  21. Future Work • To merge Layer-Clustering and Wire-Clustering. • To extend tracking algorithm, # of hits per tracks will greater than 14. • Hope : Kick event

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