[u/mrichter/AliRoot.git] / STEER / AliMagFCM.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 1.8  2001/05/28 14:10:35  morsch
SetSolenoidField method to set the L3 field strength. 2 kG is default.

Revision 1.7  2001/05/16 14:57:22  alibrary
New files for folders and Stack

Revision 1.6  2000/12/18 10:44:01  morsch
Possibility to set field map by passing pointer to objet of type AliMagF via
SetField().
Example:
gAlice->SetField(new AliMagFCM("Map2", "$(ALICE_ROOT)/data/field01.dat",2,1.,10.));

Revision 1.5  2000/12/01 11:20:27  alibrary
Corrector dipole removed from ZDC

Revision 1.4  2000/11/30 07:12:49  alibrary
Introducing new Rndm and QA classes

Revision 1.3  2000/11/10 18:09:55  fca
New field map for the ZDC

Revision 1.2  2000/07/12 08:56:25  fca
Coding convention correction and warning removal

Revision 1.1  2000/07/11 18:24:59  fca
Coding convention corrections + few minor bug fixes

*/
#include "TVector.h"

#include "AliMagFCM.h"
#include "TSystem.h"

ClassImp(AliMagFCM)

//________________________________________
AliMagFCM::AliMagFCM(const char *name, const char *title, const Int_t integ, 
		     const Float_t factor, const Float_t fmax)
  : AliMagF(name,title,integ,factor,fmax)
{
  //
  // Standard constructor
  //
  fB=0;
  fType = kConMesh;
  fMap  = 2;
  SetSolenoidField();

  if(fDebug>-1) printf("%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
	 ClassName(),fName.Data(), fMap, factor,fTitle.Data());
  
}

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

//________________________________________
void AliMagFCM::Field(Float_t *x, Float_t *b)
{
  //
  // Method to calculate the magnetic field
  //
  Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1, 
    bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
  const Double_t kone=1;
  Int_t ix, iy, iz;
  
  // --- find the position in the grid ---
  
  b[0]=b[1]=b[2]=0;
  if(-700<x[2] && x[2]<fZbeg && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) {
    b[2]= fSolenoid;
  } else  {
    Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
		    &&  ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
		    &&  ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
    if(infield) {
      xl[0]=TMath::Abs(x[0])-fXbeg;
      xl[1]=TMath::Abs(x[1])-fYbeg;
      xl[2]=x[2]-fZbeg;
      
      // --- start with x
      
      hix=xl[0]*fXdeli;
      ratx=hix-int(hix);
      ix=int(hix);
      
      hiy=xl[1]*fYdeli;
      raty=hiy-int(hiy);
      iy=int(hiy);
      
      hiz=xl[2]*fZdeli;
      ratz=hiz-int(hiz);
      iz=int(hiz);
      
      if(fMap==2) {
	// ... simple interpolation
	ratx1=kone-ratx;
	raty1=kone-raty;
	ratz1=kone-ratz;
	bhyhz = Bx(ix  ,iy+1,iz+1)*ratx1+Bx(ix+1,iy+1,iz+1)*ratx;
	bhylz = Bx(ix  ,iy+1,iz  )*ratx1+Bx(ix+1,iy+1,iz  )*ratx;
	blyhz = Bx(ix  ,iy  ,iz+1)*ratx1+Bx(ix+1,iy  ,iz+1)*ratx;
	blylz = Bx(ix  ,iy  ,iz  )*ratx1+Bx(ix+1,iy  ,iz  )*ratx;
	bhz   = blyhz             *raty1+bhyhz             *raty;
	blz   = blylz             *raty1+bhylz             *raty;
	b[0]  = blz               *ratz1+bhz               *ratz;
	//
	bhyhz = By(ix  ,iy+1,iz+1)*ratx1+By(ix+1,iy+1,iz+1)*ratx;
	bhylz = By(ix  ,iy+1,iz  )*ratx1+By(ix+1,iy+1,iz  )*ratx;
	blyhz = By(ix  ,iy  ,iz+1)*ratx1+By(ix+1,iy  ,iz+1)*ratx;
	blylz = By(ix  ,iy  ,iz  )*ratx1+By(ix+1,iy  ,iz  )*ratx;
	bhz   = blyhz             *raty1+bhyhz             *raty;
	blz   = blylz             *raty1+bhylz             *raty;
	b[1]  = blz               *ratz1+bhz               *ratz;
	//
	bhyhz = Bz(ix  ,iy+1,iz+1)*ratx1+Bz(ix+1,iy+1,iz+1)*ratx;
	bhylz = Bz(ix  ,iy+1,iz  )*ratx1+Bz(ix+1,iy+1,iz  )*ratx;
	blyhz = Bz(ix  ,iy  ,iz+1)*ratx1+Bz(ix+1,iy  ,iz+1)*ratx;
	blylz = Bz(ix  ,iy  ,iz  )*ratx1+Bz(ix+1,iy  ,iz  )*ratx;
	bhz   = blyhz             *raty1+bhyhz             *raty;
	blz   = blylz             *raty1+bhylz             *raty;
	b[2]  = blz               *ratz1+bhz               *ratz;
	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
	//ratx,raty,ratz,b[0],b[1],b[2]);
	//
	// ... use the dipole symmetry
	if (x[0]*x[1] < 0) b[1]=-b[1];
	if (x[0]<0) b[2]=-b[2];
      } else {
	printf("Invalid field map for constant mesh %d\n",fMap);
      }
    } 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;
  }
}

//________________________________________
void AliMagFCM::ReadField()
{
  // 
  // Method to read the magnetic field map from file
  //
  FILE *magfile;
  Int_t ix, iy, iz, ipx, ipy, ipz;
  Float_t bx, by, bz;
  char *fname;
  if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),fName.Data(),fTitle.Data());
  fname = gSystem->ExpandPathName(fTitle.Data());
  magfile=fopen(fname,"r");
  delete [] fname;
  if (magfile) {
    fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
    	   &fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
    if(fDebug>1) printf("%s: fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
			ClassName(),fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
    fXdeli=1./fXdel;
    fYdeli=1./fYdel;
    fZdeli=1./fZdel;
    fB = new TVector(3*fXn*fYn*fZn);
    for (iz=0; iz<fZn; iz++) {
      ipz=iz*3*(fXn*fYn);
      for (iy=0; iy<fYn; iy++) {
	ipy=ipz+iy*3*fXn;
	for (ix=0; ix<fXn; ix++) {
	  ipx=ipy+ix*3;
	  fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	  (*fB)(ipx+2)=bz;
	  (*fB)(ipx+1)=by;
	  (*fB)(ipx  )=bx;
	}
      }
    }
  } else { 
    printf("%s: File %s not found !\n",ClassName(),fTitle.Data());
    exit(1);
  }
}

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

//________________________________________
AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf)
{
  magf.Copy(*this);
  return *this;
}
Commit	Line	Data
aee8290b	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	$Log$
cf6abd21	18	Revision 1.8 2001/05/28 14:10:35 morsch
	19	SetSolenoidField method to set the L3 field strength. 2 kG is default.
	20
4cc8933f	21	Revision 1.7 2001/05/16 14:57:22 alibrary
	22	New files for folders and Stack
	23
9e1a0ddb	24	Revision 1.6 2000/12/18 10:44:01 morsch
	25	Possibility to set field map by passing pointer to objet of type AliMagF via
	26	SetField().
	27	Example:
	28	gAlice->SetField(new AliMagFCM("Map2", "$(ALICE_ROOT)/data/field01.dat",2,1.,10.));
	29
d8408e76	30	Revision 1.5 2000/12/01 11:20:27 alibrary
	31	Corrector dipole removed from ZDC
	32
006cb30c	33	Revision 1.4 2000/11/30 07:12:49 alibrary
	34	Introducing new Rndm and QA classes
	35
65fb704d	36	Revision 1.3 2000/11/10 18:09:55 fca
	37	New field map for the ZDC
	38
d95ea23f	39	Revision 1.2 2000/07/12 08:56:25 fca
	40	Coding convention correction and warning removal
	41
8918e700	42	Revision 1.1 2000/07/11 18:24:59 fca
	43	Coding convention corrections + few minor bug fixes
	44
aee8290b	45	*/
65fb704d	46	#include "TVector.h"
aee8290b	47
	48	#include "AliMagFCM.h"
	49	#include "TSystem.h"
	50
	51	ClassImp(AliMagFCM)
	52
	53	//________________________________________
	54	AliMagFCM::AliMagFCM(const char name, const char title, const Int_t integ,
d8408e76	55	const Float_t factor, const Float_t fmax)
d8408e76	56	: AliMagF(name,title,integ,factor,fmax)
aee8290b	57	{
	58	//
	59	// Standard constructor
	60	//
cf6abd21	61	fB=0;
aee8290b	62	fType = kConMesh;
d8408e76	63	fMap = 2;
4cc8933f	64	SetSolenoidField();
4cc8933f	65
9e1a0ddb	66	if(fDebug>-1) printf("%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
9e1a0ddb	67	ClassName(),fName.Data(), fMap, factor,fTitle.Data());
4cc8933f	68
aee8290b	69	}
	70
	71	//________________________________________
	72	AliMagFCM::AliMagFCM(const AliMagFCM &magf)
	73	{
	74	//
	75	// Copy constructor
	76	//
	77	magf.Copy(*this);
	78	}
	79
	80	//________________________________________
	81	void AliMagFCM::Field(Float_t x, Float_t b)
	82	{
	83	//
	84	// Method to calculate the magnetic field
	85	//
	86	Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
	87	bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
	88	const Double_t kone=1;
	89	Int_t ix, iy, iz;
	90
	91	// --- find the position in the grid ---
	92
	93	b[0]=b[1]=b[2]=0;
	94	if(-700<x[2] && x[2]<fZbeg && x[0]x[0]+(x[1]+30)(x[1]+30) < 560*560) {
4cc8933f	95	b[2]= fSolenoid;
aee8290b	96	} else {
	97	Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
	98	&& ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
	99	&& ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
	100	if(infield) {
	101	xl[0]=TMath::Abs(x[0])-fXbeg;
	102	xl[1]=TMath::Abs(x[1])-fYbeg;
	103	xl[2]=x[2]-fZbeg;
	104
	105	// --- start with x
	106
	107	hix=xl[0]*fXdeli;
	108	ratx=hix-int(hix);
	109	ix=int(hix);
	110
	111	hiy=xl[1]*fYdeli;
	112	raty=hiy-int(hiy);
	113	iy=int(hiy);
	114
	115	hiz=xl[2]*fZdeli;
	116	ratz=hiz-int(hiz);
	117	iz=int(hiz);
	118
	119	if(fMap==2) {
	120	// ... simple interpolation
	121	ratx1=kone-ratx;
	122	raty1=kone-raty;
	123	ratz1=kone-ratz;
	124	bhyhz = Bx(ix ,iy+1,iz+1)ratx1+Bx(ix+1,iy+1,iz+1)ratx;
	125	bhylz = Bx(ix ,iy+1,iz )ratx1+Bx(ix+1,iy+1,iz )ratx;
	126	blyhz = Bx(ix ,iy ,iz+1)ratx1+Bx(ix+1,iy ,iz+1)ratx;
	127	blylz = Bx(ix ,iy ,iz )ratx1+Bx(ix+1,iy ,iz )ratx;
	128	bhz = blyhz raty1+bhyhz raty;
	129	blz = blylz raty1+bhylz raty;
	130	b[0] = blz ratz1+bhz ratz;
	131	//
	132	bhyhz = By(ix ,iy+1,iz+1)ratx1+By(ix+1,iy+1,iz+1)ratx;
	133	bhylz = By(ix ,iy+1,iz )ratx1+By(ix+1,iy+1,iz )ratx;
	134	blyhz = By(ix ,iy ,iz+1)ratx1+By(ix+1,iy ,iz+1)ratx;
	135	blylz = By(ix ,iy ,iz )ratx1+By(ix+1,iy ,iz )ratx;
	136	bhz = blyhz raty1+bhyhz raty;
	137	blz = blylz raty1+bhylz raty;
	138	b[1] = blz ratz1+bhz ratz;
	139	//
	140	bhyhz = Bz(ix ,iy+1,iz+1)ratx1+Bz(ix+1,iy+1,iz+1)ratx;
	141	bhylz = Bz(ix ,iy+1,iz )ratx1+Bz(ix+1,iy+1,iz )ratx;
	142	blyhz = Bz(ix ,iy ,iz+1)ratx1+Bz(ix+1,iy ,iz+1)ratx;
	143	blylz = Bz(ix ,iy ,iz )ratx1+Bz(ix+1,iy ,iz )ratx;
	144	bhz = blyhz raty1+bhyhz raty;
	145	blz = blylz raty1+bhylz raty;
	146	b[2] = blz ratz1+bhz ratz;
	147	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
	148	//ratx,raty,ratz,b[0],b[1],b[2]);
	149	//
	150	// ... use the dipole symmetry
	151	if (x[0]*x[1] < 0) b[1]=-b[1];
	152	if (x[0]<0) b[2]=-b[2];
	153	} else {
	154	printf("Invalid field map for constant mesh %d\n",fMap);
	155	}
	156	} else {
d95ea23f	157	//This is the ZDC part
d95ea23f	158	Float_t rad2=x[0]x[0]+x[1]x[1];
006cb30c	159	if(x[2]>kCORBEG2 && x[2]<kCOREND2){
d95ea23f	160	if(rad2<kCOR2RA2){
	161	b[0] = kFCORN2;
	162	}
	163	}
	164	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	165	if(rad2<kZ1RA2){
	166	b[0] = -kG1*x[1];
	167	b[1] = -kG1*x[0];
	168	}
	169	}
	170	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	171	if(rad2<kZ2RA2){
	172	b[0] = kG1*x[1];
	173	b[1] = kG1*x[0];
	174	}
	175	}
	176	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	177	if(rad2<kZ3RA2){
	178	b[0] = kG1*x[1];
	179	b[1] = kG1*x[0];
	180	}
	181	}
	182	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	183	if(rad2<kZ4RA2){
	184	b[0] = -kG1*x[1];
	185	b[1] = -kG1*x[0];
	186	}
	187	}
	188	else if(x[2]>kD1BEG && x[2]<kD1END){
	189	if(rad2<kD1RA2){
	190	b[1] = -kFDIP;
	191	}
	192	}
	193	else if(x[2]>kD2BEG && x[2]<kD2END){
	194	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	195	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	196	b[1] = kFDIP;
aee8290b	197	}
aee8290b	198	}
d95ea23f	199
d95ea23f	200	}
aee8290b	201	}
	202	if(fFactor!=1) {
	203	b[0]*=fFactor;
	204	b[1]*=fFactor;
	205	b[2]*=fFactor;
	206	}
	207	}
	208
	209	//________________________________________
	210	void AliMagFCM::ReadField()
	211	{
	212	//
	213	// Method to read the magnetic field map from file
	214	//
	215	FILE *magfile;
	216	Int_t ix, iy, iz, ipx, ipy, ipz;
	217	Float_t bx, by, bz;
	218	char *fname;
9e1a0ddb	219	if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),fName.Data(),fTitle.Data());
aee8290b	220	fname = gSystem->ExpandPathName(fTitle.Data());
	221	magfile=fopen(fname,"r");
	222	delete [] fname;
	223	if (magfile) {
	224	fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
	225	&fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
9e1a0ddb	226	if(fDebug>1) printf("%s: fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
9e1a0ddb	227	ClassName(),fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
aee8290b	228	fXdeli=1./fXdel;
	229	fYdeli=1./fYdel;
	230	fZdeli=1./fZdel;
	231	fB = new TVector(3fXnfYn*fZn);
	232	for (iz=0; iz<fZn; iz++) {
	233	ipz=iz3(fXn*fYn);
	234	for (iy=0; iy<fYn; iy++) {
	235	ipy=ipz+iy3fXn;
	236	for (ix=0; ix<fXn; ix++) {
	237	ipx=ipy+ix*3;
	238	fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	239	(*fB)(ipx+2)=bz;
	240	(*fB)(ipx+1)=by;
	241	(*fB)(ipx )=bx;
	242	}
	243	}
	244	}
	245	} else {
9e1a0ddb	246	printf("%s: File %s not found !\n",ClassName(),fTitle.Data());
aee8290b	247	exit(1);
	248	}
	249	}
	250
	251	//________________________________________
8918e700	252	void AliMagFCM::Copy(AliMagFCM & /* magf */) const
aee8290b	253	{
aee8290b	254	//
8918e700	255	// Copy *this onto magf -- Not implemented
aee8290b	256	//
	257	Fatal("Copy","Not implemented!\n");
	258	}
	259
	260	//________________________________________
	261	AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf)
	262	{
	263	magf.Copy(*this);
	264	return *this;
	265	}