SolenoidTest.h

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
/*
 * @author Masahiro Morii, Harvard University
 * Christos Anastopoulos move to using conditions Alg (MT)
 *
 * @brief Test that dumps the solenoid for a selected event
 * used as unit test see
 */
 
#ifndef SOLENOIDTEST_H
#define SOLENOIDTEST_H
 
// FrameWork includes
#include "AthenaBaseComps/AthAlgorithm.h"
#include "MagFieldConditions/AtlasFieldCacheCondObj.h"
#include "StoreGate/ReadHandleKey.h"
#include "GaudiKernel/ITHistSvc.h"
//
#include <atomic>
#include <string>
 
 
// forward declarations
class TTree;
 
namespace MagField {
 
class SolenoidTest : public AthAlgorithm {
 
 public:
  SolenoidTest(const std::string& name, ISvcLocator* pSvcLocator);
  virtual StatusCode initialize() override final;
  virtual StatusCode execute(const EventContext& ctx) override final;
 
 private:
  // Read Magnetic Field
  SG::ReadCondHandleKey<AtlasFieldCacheCondObj> m_fieldCacheKey{
      this, "AtlasFieldCacheCondObj", "fieldCondObj",
      "Magnetic Field conditions object key"};

  ServiceHandle<ITHistSvc> m_thistSvc;
  double m_xyzt[4]{};      
  double m_field[3]{};     
  double m_fieldZR[3]{};   
  double m_deriv[9]{};     
  double m_derivZR[9]{};   
  TTree* m_tree{nullptr};
 
  Gaudi::Property<std::string> m_histStream{
      this, "HistStreamName", "SolenoidTest",
      "Name of the THistSvc output stream"};
  Gaudi::Property<std::string> m_treeName{
      this, "ROOTTreeName", "field",
      "Name of the TTree object in the output file."};
  Gaudi::Property<double> m_minR{this, "MinimumR", 0, "minimum R"};
  Gaudi::Property<double> m_maxR{this, "MaximumR", 1075., "maximum R"};
  Gaudi::Property<double> m_minZ{this, "MinimumZ", -2820, "minimum Z"};
  Gaudi::Property<double> m_maxZ{this, "MaximumZ", 2820., "maximum Z"};
  Gaudi::Property<int> m_stepsR{this, "StepsR", 200,
                                "Number of steps along radius (granularity)"};
  Gaudi::Property<int> m_stepsZ{this, "StepsZ", 200,
                                "Number of steps along z (granularity)"};
  Gaudi::Property<int> m_stepsPhi{this, "StepsPhi", 200,
                                  "Number of steps along phi (granularity)"};
  Gaudi::Property<int> m_event{this, "eventTodump", 0,
                               "Event to dump the magnetic field for"};
  std::atomic<long int> m_eventsSeen{0};  
 
};  // end class SolenoidTest
 
}  // end namespace MagField
 
#endif