PndEmcAsicPulseshape.h

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//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
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//-----------------------------------------------------------
// Description:
//      Pulseshape from an APFEL ASIC preamplifier shaper
//      Circuit is described in EMC TDR and consists of charge-sensitive preamplifier,
//      with the following pole-zero cancelation of its feedback ad 3rd order integrator.
//        The pulseshape is determined by the integration time of single intagrator stage
//      and scintillation time of the crystal, with exponential input convoluted with
//      response of the circuit
//
//-----------------------------------------------------------
//#pragma once
#ifndef PNDEMCASICPULSESHAPE_H
#define PNDEMCASICPULSESHAPE_H

// Base Class Headers ----------------
#include "PndEmcAbsPulseshape.h"

// Collaborating Class Headers -------
//#include <ostream>

class PndEmcAsicPulseshape : public PndEmcAbsPulseshape {
 public:
  // Constructors/Destructors ---------
  PndEmcAsicPulseshape();
  PndEmcAsicPulseshape(double Tint, double Tsig);
  virtual ~PndEmcAsicPulseshape() { ; }

  // Operators

  // Accessors -----------------------

  // Modifiers -----------------------

  // Operations ----------------------
  virtual double operator()(const double t, const double amp, const double toffset) const;

 private:
  // Private Data Members ------------
  double fTint;
  double fTsig;

  // Private Methods -----------------

  double general_solution(const double t, const double amp, const double toffset) const;
  double degenerate_solution(const double t, // for Tdif=Tint
                             const double amp, const double toffset) const;

  ClassDef(PndEmcAsicPulseshape, 1)
};

#endif