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Question multiple field maps 

Keywords: multiple field maps magnetic field
Forum: Fields: Magnetic and Otherwise
Date: 27 Feb, 2007
From: Kazutaka Nakahara <nakahara@post.kek.jp>

Hi,

I'd like to use multiple field maps in my simulation.  Does the G4FieldManager
allow this?

I basically have:

----------------------------------------------
     G4FieldManager   *pFieldMgr;
//	 G4MagIntegratorStepper *pStepper;

      //Field grid in A9.TABLE. File must be in accessible from run urn directory
      G4MagneticField* MuonMagField;
      G4MagneticField* MuonMagField1;
      G4MagneticField* MuonMagField2;

      MuonMagField= new MuonField3D("front_field_original.Table", zOffset);
      MuonMagField1= new MuonField3D("transport_file1.Table", zOffset); 
      MuonMagField2= new MuonField3D("transport_file2.Table", zOffset); 

      pFieldMgr=G4TransportationManager::GetTransportationManager()->GetFieldManager();
      pFieldMgr1=G4TransportationManager::GetTransportationManager()->GetFieldManager();
      pFieldMgr2=G4TransportationManager::GetTransportationManager()->GetFieldManager();    
  
      G4ChordFinder *pChordFinder = new G4ChordFinder(MuonMagField);
      G4ChordFinder *pChordFinder1 = new G4ChordFinder(MuonMagField1);
      G4ChordFinder *pChordFinder2 = new G4ChordFinder(MuonMagField2);

      pFieldMgr->SetChordFinder( pChordFinder );
      pFieldMgr->SetChordFinder( pChordFinder1 );
      pFieldMgr->SetChordFinder( pChordFinder2 );

      pFieldMgr->SetDetectorField(MuonMagField);
      pFieldMgr->SetDetectorField(MuonMagField1);
      pFieldMgr->SetDetectorField(MuonMagField2);
-------------------------------------------------------------

But this doesn't seem to work at all (none of the fields register in the 
simulation).  However, this does work when I use only one field map.

Is it possible to make G4FieldManager accept multiple maps, or do I need to 
combine them into one file?

Thanks in advance,
Kaz

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1 Warning: Re: multiple field maps   (Peter Gumplinger - 30 Apr, 2007)
(_ None: Re: multiple field maps   (Tom Roberts - 01 May, 2007)
(_ None: Re: multiple field maps   (maurizio - 01 Aug, 2007)
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