JGinneken.cc

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#include <string>
#include <iostream>
#include <iomanip>

#include "TROOT.h"
#include "TFile.h"
#include "TH1D.h"

#include "JPhysics/JRadiation.hh"

#include "JROOT/JManager.hh"
#include "JROOT/JRootToolkit.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"

/**
 * Example application to display theta RMS of muon energy loss.
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;

  string         outputFile;
  int            debug;

  try { 

    JParser<> zap;

    zap['o'] = make_field(outputFile)    = "ginneken.root";
    zap['d'] = make_field(debug)         = 0;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  const JRadiation radiation(4.0, 8.0, 40, 0.01, 0.1, 0.1);  // Be

  JManager<double, TH1D> HA(new TH1D("Brems1 [% GeV]", NULL, 10000, -7.5, log10(0.5)));
  JManager<double, TH1D> HB(new TH1D("Brems2 [% GeV]", NULL, 10000, -3.2, log10(0.5)));
  JManager<double, TH1D> HC(new TH1D("EErad  [% GeV]", NULL, 10000, -7.8, 0.0));

  for (const double E : { 1.0e2, 1.0e3 }) {

    TH1D* ha = HA[E];
    TH1D* hb = HB[E];
    TH1D* hc = HC[E];

    for (int i = 1; i <= ha->GetNbinsX(); ++i) {

      const double x = ha->GetBinCenter(i);
      const double v = pow(10.0, x);
      const double y = radiation.ThetaRMSfromBrems(E, v);
    
      ha->SetBinContent(i, y);
    }

    for (int i = 1; i <= hb->GetNbinsX(); ++i) {
      
      const double x = hb->GetBinCenter(i);
      const double v = 1.0 - pow(10.0, x);
      const double y = radiation.ThetaRMSfromBrems(E, v);

      hb->SetBinContent(i, y);
    }

    for (int i = 1; i <= hc->GetNbinsX(); ++i) {
      
      const double x = hc->GetBinCenter(i);
      const double v = pow(10.0, x);
      const double y = radiation.ThetaRMSfromEErad(E, v);
    
      hc->SetBinContent(i, y);
    }
  }

  TFile out(outputFile.c_str(), "recreate");

  out << HA << HB << HC;

  out.Write();
  out.Close();
}