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ITTF Implementation Specifics: HitErrorCalculator

ITTF Implementation Specifics: HitErrorCalculator. Andrew Rose. ITTF Review, Sept 23, 02 - BNL. HitErrorCalculator. Self contained, independent class User sets: User input parameterization (z, cross, dip) DB, default, etc. Class Hierarchy.

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ITTF Implementation Specifics: HitErrorCalculator

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  1. ITTFImplementation Specifics: HitErrorCalculator Andrew Rose ITTF Review, Sept 23, 02 - BNL

  2. HitErrorCalculator • Self contained, independent class • User sets: • User input parameterization (z, cross, dip) • DB, default, etc. Andrew Rose

  3. Class Hierarchy • Virtual base class StiHitErrorDefault defines the interface • Implementation in StiHitErrorCalculator • Encapsulated functions represent each detector Andrew Rose

  4. Hit Error Parameterization • Hit errors calculated with M. Lisa parameterization • Fct of “z”, crossing and pitch angles: qy, qz • All detectors currently parameterized using a similar scheme. In tpc, • Requires further studies for SVT, SSD, FTPC Andrew Rose

  5. ITTFImplementation Specifics: dE/dx Calculator Andrew Rose ITTF Review, Sept 23, 02 - BNL

  6. StiDedxCalculator • Independently functioning class • Single instance for each detector • User sets: • Detector for Calculation • fraction for the truncated mean Andrew Rose

  7. GetDedx • Arguments: StiKalmanTrack, return arguments dedx, dedx error, number of fit points used in the calculation. Get track nodes (detector) Calculate dE/dx for each node Truncated mean: mFraction*(number of points) Andrew Rose

  8. yg D xl yoff yl rc rn qn qc xg dE/dx Hit Calculation • dE from previously calibrated hit • dx calculated from track, detector characteristics: Andrew Rose

  9. dE/dx Results Andrew Rose

  10. Future Work • Current dE/dx LOW! (~.6*Tpt) Andrew Rose

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