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Kalman Filter of TPCana

Kalman Filter of TPCana. Jia-Ye Chen 2007.12.22. Outline. Kalman Filter of TPCana Criteria and cylindrical-coordinate framework 1 Monte Carlo Testing by single K + /K - in uniform B field. Real Data Study. 1 Extended Kalman Filter, K. Fujii, The ACFA-Sim-J Group. Kalman Filter.

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Kalman Filter of TPCana

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  1. Kalman Filter of TPCana Jia-Ye Chen 2007.12.22 LEPS Analysis Meeting

  2. Outline • Kalman Filter of TPCana • Criteria and cylindrical-coordinate framework1 • Monte Carlo Testing by single K+/K- in uniform B field. • Real Data Study 1Extended Kalman Filter, K. Fujii, The ACFA-Sim-J Group. LEPS Analysis Meeting

  3. Kalman Filter • Equation of Motion is (quasi-) linear. • Many discrete points of measurements. • The distance between adjacent measurement points is short. LEPS Analysis Meeting

  4. Runge-Kutta vs Kalman Filter LEPS Analysis Meeting

  5. Residual vs. Dip Angle LEPS Analysis Meeting

  6. Residual vs. Momentum LEPS Analysis Meeting

  7. Residual vs. Dip Angle & Mom. LEPS Analysis Meeting

  8. Particle Identification • Energy Loss • (W/O saturated pulse reconstruction ) • Previous : hit’s central-pad peakADC • Now : sum of (2 or 3) pads’ peakADC belong to one hit, to reduce the ambiguity from different avalanche ranges. NEW LEPS Analysis Meeting

  9. PID Slice Mom. × Charge : 20 slices from -1.0 GeV/c to 1.0 GeV/c LEPS Analysis Meeting

  10. Summary & Future Work • Overall, 30% improvement in transverse residual, and 10% in longitudinal by utilizing Kalman Filter. • To reduce the ambiguity between narrow and wider avalanche, sum of pads peakADC gives narrow PID band. • Non-uniform B field of Kalman Filter • χ2 probability LEPS Analysis Meeting

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