PndLmdCalStrip.h

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/*
 * PndLmdCalStrip.h *
 *  Created on: Jul 28, 2009
 *      Author: huagen
 */
//*************************************************************************************
// this class PndLmdCalStrip will handle the different strip structure of the silicon
//sensor.The different strip structure shall be covered, for example, short strips in
// two segments, curved strips in one segment etc. Due to thin sensor the strips shall
// be made in one side.
//The charge diffusion after ionization will be taken into consideration. The gaussian
// smearing with sigma 8um was employeed for the charge diffussion
// For each strip fired the noise shall be added
//**************************************************************************************

#ifndef PNDLMDCALSTRIP_H_
#define PNDLMDCALSTRIP_H_

#include <iostream>
#include <cmath>
#include "PndLmdDigiPara.h"
#include "TRandom3.h"


#include "PndLmdStrips.h"

#include "TVector2.h"
#include <vector>
#include "PndDetectorList.h"

class PndLmdCalStrip
{
public:
        //default constructor
    PndLmdCalStrip();
        //pitch @param the width of the strip
        //orient @param the strip orient angle cross with x axis
        //firstStripAnchor @param the first pitch point
        //threshold @param the threshold of the signal
        //noise @param the electric noise
        //nrStrips @param the number of strips
        //nrFeChannels @param the number of channels per FE modules
        PndLmdCalStrip(Double_t pitch,Double_t orient, Int_t nrStrips, Int_t nrFeChannels, const TVector2& firstStripAnchor,
                               Double_t threshold, Double_t noise,Double_t sigma);

        //fdigipara @ the digitization parameters stored with ASCii file
        //segment @ the segment of the sensor, left or right
        PndLmdCalStrip(const PndLmdDigiPara *digipara, SensorSegment segment = kLEFT);
    //for curve strips
//      PndLmdCalStrip(const PndLmdDigiPara *digipara, SensorSide side = kTOP);

        ~PndLmdCalStrip(){};

        //public method for strips number calculation
    std::vector<PndLmdStrips> GetStrips(Double_t inx, Double_t iny, Double_t inz,
                                    Double_t outx, Double_t outy, Double_t outz,Double_t eloss);
    //digi the strips
    std::vector<PndLmdStrips> DigiStripFromPoint(Double_t inx, Double_t iny, Double_t inz,
                                   Double_t outx, Double_t outy, Double_t outz, Double_t eloss);

    std::vector<PndLmdStrips> GetCurveStrip(Double_t inx, Double_t iny, Double_t inz,
                                   Double_t outx, Double_t outy, Double_t outz, Double_t eLoss);

    //calculate the channels
    Int_t CalChannelFromStrip(Int_t stripNr);

    //calculate the FE number
    Int_t CalFeFromStrip(Int_t stripNr);

    //Smear noise to the signal
    Double_t AddNoise(Double_t charge);

    //charge diffusion during collection
    Double_t ChargeDiffusion(Double_t u,Double_t a,Double_t path,Double_t dir, Double_t Q);

    void print() const;

private:
        Double_t fPitch;                 //the width of strip
        Double_t fOrient;                //the strip orientation
        TVector2 fAnchor;                 //anchor point for first strip
        Int_t fNrStrips;                  //the number of strips in active area
        Int_t fNrFEChannels;              //the number of channels per FE
        Double_t fThreshold;
        Double_t fNoise;
    TVector2 fStripDir;
    TVector2 fOrthoDir;
    TRandom3* fRNG;
    Double_t fSigma;

   //calculate the strip number based on the point information
    //the coordinate x, and y in the local coordinate system of the sensor
    //return the strip number with double_t
    Double_t CalStripFromPoint(Double_t x, Double_t y);

    Double_t CalCurveStripFromPoint(Double_t x, Double_t y);

    //the conversion from Eloss to charge.
    Double_t ChargeFromEloss(Double_t eloss) const;


    ClassDef(PndLmdCalStrip,3);

};



#endif /* PNDLMDCALSTRIP_H_ */