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ITTF Implementation Specifics: HitErrorCalculator

This document presents the Hit Error Calculator and dE/dx Calculator developed by Andrew Rose for the ITTF Implementation. Focused on self-contained, independent classes, the Hit Error Calculator allows users to input parameters such as z, cross, and dip to evaluate hit errors across various detectors using standardized models. Additionally, the dE/dx Calculator facilitates single-instance calculations for each detector to compute energy loss, emphasizing the importance of fit points and truncated means. Further studies are recommended for detectors like SVT, SSD, and FTPC to improve accuracy.

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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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