[u/mrichter/AliRoot.git] / STEER / AliMagFMaps.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/*
$Log$
Revision 1.5  2002/02/26 09:48:14  morsch
Extra argument in constructor for l3 map choice.

Revision 1.4  2002/02/22 14:00:20  morsch
Protection against replication of fieldmap data in gAlice.

Revision 1.3  2002/02/21 09:23:41  morsch
Create dummy field map for L3 in case no detailed map is needed.

Revision 1.2  2002/02/19 16:14:35  morsch
Reading of 0.2 T solenoid field map enabled.

Revision 1.1  2002/02/14 11:41:28  morsch
Magnetic field map for ALICE for L3+muon spectrometer stored in 3 seperate
root files.

*/

//
// Author: Andreas Morsch <andreas.morsch@cern.ch>
//

#include <TFile.h>
#include <TSystem.h>
#include "AliFieldMap.h"
#include "AliMagFMaps.h"


ClassImp(AliMagFMaps)

//________________________________________
AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ, 
			 const Float_t factor, const Float_t fmax, const Int_t map, 
			 const Int_t l3)
  : AliMagF(name,title,integ,factor,fmax)
{
  //
  // Standard constructor
  //
  fType         = kConMesh;
  fFieldMap[0]  = 0;
  fMap          = map;
  fL3Option     = l3;

  ReadField();
  fFieldRead = 1;
//
// Don't replicate field information in gAlice
  for (Int_t i = 0; i < 3; i++)  fFieldMap[i]->SetWriteEnable(0);
//

}

//________________________________________
AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf)
{
  //
  // Copy constructor
  //
  magf.Copy(*this);
}

AliMagFMaps::~AliMagFMaps()
{
//
//  Destructor
//
    delete fFieldMap[0];
    delete fFieldMap[1];
    delete fFieldMap[2];    
}

void AliMagFMaps::ReadField()
{
//  Read Field Map from file
//
//  don't read twice
//
    if (fFieldRead) return;
//    
    char* fname;
    TFile* file = 0;
    if (fMap == k2kG) {
	if (fL3Option) {
	    fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root");
	    file = new TFile(fname);
	    fFieldMap[0] = (AliFieldMap*) file->Get("L3B02");
	    file->Close();
	    delete file;
	}
	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root");
	file = new TFile(fname);
	fFieldMap[1] = (AliFieldMap*) file->Get("DipB02");
	file->Close();
	delete file;;
	
	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root");
	file = new TFile(fname);
	fFieldMap[2] = (AliFieldMap*) file->Get("ExtB02");
	file->Close();
	delete file;
	fSolenoid = 2.;
    } else if (fMap == k4kG) {
	if (fL3Option) {
	    fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root");
	    file = new TFile(fname);
	    fFieldMap[0] = (AliFieldMap*) file->Get("L3B04");
	    file->Close();
	    delete file;
	}
	
	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root");
	file = new TFile(fname);
	fFieldMap[1] = (AliFieldMap*) file->Get("DipB04");
	file->Close();
	delete file;;
	
	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root");
	file = new TFile(fname);
	fFieldMap[2] = (AliFieldMap*) file->Get("ExtB04");
	file->Close();
	delete file;
	fSolenoid = 4.;
    } else if (fMap == k5kG) {
	if (fL3Option) {
	    fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root");
	    file = new TFile(fname);
	    fFieldMap[0] = (AliFieldMap*) file->Get("L3B05");
	    file->Close();
	    delete file;
	}
	
	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root");
	file = new TFile(fname);
	fFieldMap[1] = (AliFieldMap*) file->Get("DipB05");
	file->Close();
	delete file;;
	
	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root");
	file = new TFile(fname);
	fFieldMap[2] = (AliFieldMap*) file->Get("ExtB05");
	file->Close();
	delete file;
	
	fSolenoid = 5.;
    }

    if (!fL3Option) {
//
// Dummy L3 map
	fFieldMap[0] = new AliFieldMap();
	fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.);
    }
}


Float_t AliMagFMaps::SolenoidField() const
{
//
// Returns max. L3 (solenoid) field strength 
// according to field map setting

    return fSolenoid;
}

    
//________________________________________
void AliMagFMaps::Field(Float_t *x, Float_t *b)
{
  //
  // Method to calculate the magnetic field
  //
  // --- find the position in the grid ---
  
  b[0]=b[1]=b[2]=0;
  AliFieldMap* map = 0;
  if (fFieldMap[0]->Inside(x[0], x[1], x[2])) {
      map = fFieldMap[0];
      if (!fL3Option) {
//
//     Constant L3 field, if this option was selected
//
	  b[2] = fSolenoid;
	  return;
      }
  } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) {
      map = fFieldMap[1];
  } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) {
      map = fFieldMap[2];
  }
  
  if(map){
      map->Field(x,b);
  } else {
//This is the ZDC part
      Float_t rad2=x[0]*x[0]+x[1]*x[1];
      if(x[2]>kCORBEG2 && x[2]<kCOREND2){
	  if(rad2<kCOR2RA2){
	      b[0] = kFCORN2;
	  }
      }
      else if(x[2]>kZ1BEG && x[2]<kZ1END){  
	  if(rad2<kZ1RA2){
	      b[0] = -kG1*x[1];
	      b[1] = -kG1*x[0];
	  }
      }
      else if(x[2]>kZ2BEG && x[2]<kZ2END){  
	  if(rad2<kZ2RA2){
	      b[0] = kG1*x[1];
	      b[1] = kG1*x[0];
	  }
      }
      else if(x[2]>kZ3BEG && x[2]<kZ3END){  
	  if(rad2<kZ3RA2){
	      b[0] = kG1*x[1];
	      b[1] = kG1*x[0];
	  }
      }
      else if(x[2]>kZ4BEG && x[2]<kZ4END){  
	  if(rad2<kZ4RA2){
	      b[0] = -kG1*x[1];
	      b[1] = -kG1*x[0];
	  }
      }
      else if(x[2]>kD1BEG && x[2]<kD1END){ 
	  if(rad2<kD1RA2){
	      b[1] = -kFDIP;
	  }
      }
      else if(x[2]>kD2BEG && x[2]<kD2END){
	  if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
	     || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
	      b[1] = kFDIP;
	  }
      }
  }
  if(fFactor!=1) {
      b[0]*=fFactor;
      b[1]*=fFactor;
      b[2]*=fFactor;
  }
  b[0]*=1.1;
  
}

//________________________________________
void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const
{
  //
  // Copy *this onto magf -- Not implemented
  //
  Fatal("Copy","Not implemented!\n");
}

//________________________________________
AliMagFMaps & AliMagFMaps::operator =(const AliMagFMaps &magf)
{
  magf.Copy(*this);
  return *this;
}
Commit	Line	Data
84737f5e	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/*
	17	$Log$
c2b548d6	18	Revision 1.5 2002/02/26 09:48:14 morsch
	19	Extra argument in constructor for l3 map choice.
	20
356f9803	21	Revision 1.4 2002/02/22 14:00:20 morsch
	22	Protection against replication of fieldmap data in gAlice.
	23
7b6cddfa	24	Revision 1.3 2002/02/21 09:23:41 morsch
	25	Create dummy field map for L3 in case no detailed map is needed.
	26
7a1ab119	27	Revision 1.2 2002/02/19 16:14:35 morsch
	28	Reading of 0.2 T solenoid field map enabled.
	29
bfd6c805	30	Revision 1.1 2002/02/14 11:41:28 morsch
	31	Magnetic field map for ALICE for L3+muon spectrometer stored in 3 seperate
	32	root files.
	33
84737f5e	34	*/
	35
	36	//
	37	// Author: Andreas Morsch <andreas.morsch@cern.ch>
	38	//
	39
	40	#include <TFile.h>
	41	#include <TSystem.h>
	42	#include "AliFieldMap.h"
	43	#include "AliMagFMaps.h"
	44
	45
	46	ClassImp(AliMagFMaps)
	47
	48	//________________________________________
	49	AliMagFMaps::AliMagFMaps(const char name, const char title, const Int_t integ,
356f9803	50	const Float_t factor, const Float_t fmax, const Int_t map,
356f9803	51	const Int_t l3)
84737f5e	52	: AliMagF(name,title,integ,factor,fmax)
	53	{
	54	//
	55	// Standard constructor
	56	//
	57	fType = kConMesh;
	58	fFieldMap[0] = 0;
c2b548d6	59	fMap = map;
	60	fL3Option = l3;
	61
	62	ReadField();
	63	fFieldRead = 1;
7b6cddfa	64	//
	65	// Don't replicate field information in gAlice
	66	for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0);
	67	//
c2b548d6	68
84737f5e	69	}
	70
	71	//________________________________________
	72	AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf)
	73	{
	74	//
	75	// Copy constructor
	76	//
	77	magf.Copy(*this);
	78	}
	79
	80	AliMagFMaps::~AliMagFMaps()
	81	{
	82	//
	83	// Destructor
	84	//
	85	delete fFieldMap[0];
	86	delete fFieldMap[1];
	87	delete fFieldMap[2];
	88	}
	89
c2b548d6	90	void AliMagFMaps::ReadField()
	91	{
	92	// Read Field Map from file
	93	//
	94	// don't read twice
	95	//
	96	if (fFieldRead) return;
	97	//
	98	char* fname;
	99	TFile* file = 0;
	100	if (fMap == k2kG) {
	101	if (fL3Option) {
	102	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root");
	103	file = new TFile(fname);
	104	fFieldMap[0] = (AliFieldMap*) file->Get("L3B02");
	105	file->Close();
	106	delete file;
	107	}
	108	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root");
	109	file = new TFile(fname);
	110	fFieldMap[1] = (AliFieldMap*) file->Get("DipB02");
	111	file->Close();
	112	delete file;;
	113
	114	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root");
	115	file = new TFile(fname);
	116	fFieldMap[2] = (AliFieldMap*) file->Get("ExtB02");
	117	file->Close();
	118	delete file;
	119	fSolenoid = 2.;
	120	} else if (fMap == k4kG) {
	121	if (fL3Option) {
	122	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root");
	123	file = new TFile(fname);
	124	fFieldMap[0] = (AliFieldMap*) file->Get("L3B04");
	125	file->Close();
	126	delete file;
	127	}
	128
	129	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root");
	130	file = new TFile(fname);
	131	fFieldMap[1] = (AliFieldMap*) file->Get("DipB04");
	132	file->Close();
	133	delete file;;
	134
	135	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root");
	136	file = new TFile(fname);
	137	fFieldMap[2] = (AliFieldMap*) file->Get("ExtB04");
	138	file->Close();
	139	delete file;
	140	fSolenoid = 4.;
	141	} else if (fMap == k5kG) {
	142	if (fL3Option) {
	143	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root");
	144	file = new TFile(fname);
	145	fFieldMap[0] = (AliFieldMap*) file->Get("L3B05");
	146	file->Close();
	147	delete file;
	148	}
	149
	150	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root");
	151	file = new TFile(fname);
	152	fFieldMap[1] = (AliFieldMap*) file->Get("DipB05");
	153	file->Close();
154	delete file;;
155
156	fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root");
157	file = new TFile(fname);
158	fFieldMap[2] = (AliFieldMap*) file->Get("ExtB05");
159	file->Close();
160	delete file;
161
162	fSolenoid = 5.;
163	}
164
165	if (!fL3Option) {
166	//
167	// Dummy L3 map
168	fFieldMap[0] = new AliFieldMap();
169	fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.);
170	}
171	}
172
84737f5e	173
	174	Float_t AliMagFMaps::SolenoidField() const
	175	{
	176	//
	177	// Returns max. L3 (solenoid) field strength
	178	// according to field map setting
	179
	180	return fSolenoid;
	181	}
	182
	183
	184
	185	//________________________________________
	186	void AliMagFMaps::Field(Float_t x, Float_t b)
	187	{
	188	//
	189	// Method to calculate the magnetic field
	190	//
84737f5e	191	// --- find the position in the grid ---
	192
	193	b[0]=b[1]=b[2]=0;
	194	AliFieldMap* map = 0;
84737f5e	195	if (fFieldMap[0]->Inside(x[0], x[1], x[2])) {
84737f5e	196	map = fFieldMap[0];
356f9803	197	if (!fL3Option) {
84737f5e	198	//
	199	// Constant L3 field, if this option was selected
	200	//
	201	b[2] = fSolenoid;
	202	return;
	203	}
	204	} else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) {
	205	map = fFieldMap[1];
	206	} else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) {
	207	map = fFieldMap[2];
	208	}
	209
	210	if(map){
	211	map->Field(x,b);
	212	} else {
	213	//This is the ZDC part
	214	Float_t rad2=x[0]x[0]+x[1]x[1];
	215	if(x[2]>kCORBEG2 && x[2]<kCOREND2){
	216	if(rad2<kCOR2RA2){
	217	b[0] = kFCORN2;
	218	}
	219	}
	220	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	221	if(rad2<kZ1RA2){
	222	b[0] = -kG1*x[1];
	223	b[1] = -kG1*x[0];
	224	}
	225	}
	226	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	227	if(rad2<kZ2RA2){
	228	b[0] = kG1*x[1];
	229	b[1] = kG1*x[0];
	230	}
	231	}
	232	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	233	if(rad2<kZ3RA2){
	234	b[0] = kG1*x[1];
	235	b[1] = kG1*x[0];
	236	}
	237	}
	238	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	239	if(rad2<kZ4RA2){
	240	b[0] = -kG1*x[1];
	241	b[1] = -kG1*x[0];
	242	}
	243	}
	244	else if(x[2]>kD1BEG && x[2]<kD1END){
	245	if(rad2<kD1RA2){
	246	b[1] = -kFDIP;
	247	}
	248	}
	249	else if(x[2]>kD2BEG && x[2]<kD2END){
	250	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	251	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	252	b[1] = kFDIP;
	253	}
	254	}
	255	}
	256	if(fFactor!=1) {
	257	b[0]*=fFactor;
	258	b[1]*=fFactor;
	259	b[2]*=fFactor;
	260	}
356f9803	261	b[0]*=1.1;
356f9803	262
84737f5e	263	}
	264
	265	//________________________________________
	266	void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const
	267	{
	268	//
	269	// Copy *this onto magf -- Not implemented
	270	//
	271	Fatal("Copy","Not implemented!\n");
	272	}
	273
	274	//________________________________________
	275	AliMagFMaps & AliMagFMaps::operator =(const AliMagFMaps &magf)
	276	{
	277	magf.Copy(*this);
	278	return *this;
	279	}