Track finder for STS with conformal mapping

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Track finder for STSwith conformal mapping
O. Rogachevsky
May 10 2004 GSI
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Hits in STS planes
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Conformal mapping
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Different momenta mapping
UV plane
XZ plane
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Parameters cutting
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Hit by hit comparison
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Hit by hit comparison
nonhomogeneous magnetic field UrQMD 100 events
AuAu at 25 GeV/n ?N?tracks 900
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Track reconstruction efficiency
Reconstruction for vertex track only
ehits ? .6
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Summary

• Conformal mapping is very robust track finding
  method for non-homogeneous magnetic field
• Results are preliminary and tuning of parameters
  is needed