PndSdsTimeWalkCorrSimple.h

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//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
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//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
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/*
 * PndSdsTimeWalkCorrSimple.h
 *
 *  Created on: Aug 26, 2010
 *      Author: esch
 *
 *      This class calculates the TimeWalkCorrection from TOT time
 *      using a triangular model of the signal
 *      (see PndSdsTotChargeConversion)
 *                                           _____________________________________________
 *                  t_r*m-Q_thr-t_tot*m      | / t_r*m-Q_thr-t_tot*m \ 2                 |
 *      Q(tot) = - --------------------- + \ ||  -------------------  |  + t_r*Q_thr*m
 *                          2               \| \           2         /
 *                 Q_thr
 *      t_tw(Q) = -------- * t_r
 *                 Q(tot)
 *
 *
 *     Params from Parameter Database:
 *     ------------------------------
 *     t_r = rising time of the signal
 *     Q_thr = threshold charge
 *     m = constatnt current to unload the capacitor
 *
 */

#ifndef PNDSDSTIMEWALKCORRSIMPLE_H_
#define PNDSDSTIMEWALKCORRSIMPLE_H_

#include "PndSdsTimeWalkCorr.h"
#include <iostream>
#include <cmath>

class PndSdsTimeWalkCorrSimple : public PndSdsTimeWalkCorr {
 public:
  PndSdsTimeWalkCorrSimple();

  PndSdsTimeWalkCorrSimple(Double_t risingtime, Double_t constcurrent, Double_t thr, Double_t frequency, Int_t verblevel);

  virtual ~PndSdsTimeWalkCorrSimple();

  virtual Double_t CorrectionTimeWalk(Double_t tot);
  virtual Double_t GetCharge() { return fCharge; };

 private:
  Double_t fRisingTime;        // ns
  Double_t fConstantCurrent;   // e/ns
  Double_t fTimeOverThreshold; // ns
  Double_t fThreshold;         // e
  Double_t fFrequency;         // MHz
  Int_t fVerboseLevel;
  Double_t fCharge;   // e
  Double_t fTimeWalk; // ns
  Double_t CalculateCharge(Double_t);
  Double_t CalculateTimeWalk(Double_t);

  ClassDef(PndSdsTimeWalkCorrSimple, 1);
};

#endif /* PNDSDSTIMEWALKCORRSIMPLE_H_ */