kalman filter of tpcana
Post on 02-Jan-2016
34 Views
Preview:
DESCRIPTION
TRANSCRIPT
LEPS Analysis Meeting
Kalman Filter of TPCana
Jia-Ye Chen2007.12.22
2007.12.22 LEPS Analysis Meeting
Outline
• Kalman Filter of TPCana• Criteria and cylindrical-coordinate framewo
rk1
• Monte Carlo Testing by single K+/K- in uniform B field.
• Real Data Study
1Extended Kalman Filter, K. Fujii, The ACFA-Sim-J Group.
2007.12.22 LEPS Analysis Meeting
Kalman Filter
• Equation of Motion is (quasi-) linear.• Many discrete points of measurements.• The distance between adjacent measurement
points is short.
2007.12.22 LEPS Analysis Meeting
Runge-Kutta vs Kalman Filter
2007.12.22 LEPS Analysis Meeting
Residual vs. Dip Angle
2007.12.22 LEPS Analysis Meeting
Residual vs. Momentum
2007.12.22 LEPS Analysis Meeting
Residual vs. Dip Angle & Mom.
2007.12.22 LEPS Analysis Meeting
Particle Identification
NEWEnergy 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.
2007.12.22 LEPS Analysis Meeting
PID SliceMom. × Charge : 20 slices from -1.0 GeV/c to 1.0 GeV/c
2007.12.22 LEPS Analysis Meeting
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
top related