[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.                  *
 **************************************************************************/

/* $Id$ */

//-----------------------------------------------------------------------
//  Class for Alice magnetic field with constant mesh
//  Used in the configuration macros (macros/Config.C, etc.)
//  Author:
//-----------------------------------------------------------------------
#include "TSystem.h"
#include "TVector.h"

#include "AliMagFCM.h"

ClassImp(AliMagFCM)

//_______________________________________________________________________
AliMagFCM::AliMagFCM():
  fXbeg(0),
  fYbeg(0),
  fZbeg(0),
  fXdel(0),
  fYdel(0),
  fZdel(0),
  fSolenoid(0),
  fXdeli(0),
  fYdeli(0),
  fZdeli(0),
  fXn(0),
  fYn(0),
  fZn(0),
  fB(0)
{
  //
  // Standard constructor
  //
  fType = kConMesh;
  fMap  = 2;
  SetSolenoidField();
}

//_______________________________________________________________________
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),
  fXbeg(0),
  fYbeg(0),
  fZbeg(0),
  fXdel(0),
  fYdel(0),
  fZdel(0),
  fSolenoid(0),
  fXdeli(0),
  fYdeli(0),
  fZdeli(0),
  fXn(0),
  fYn(0),
  fZn(0),
  fB(0)
{
  //
  // Standard constructor
  //
  fType = kConMesh;
  fMap  = 2;
  SetSolenoidField();

  if(fDebug>-1) Info("ctor",
     "%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):
  AliMagF(magf),
  fXbeg(0),
  fYbeg(0),
  fZbeg(0),
  fXdel(0),
  fYdel(0),
  fZdel(0),
  fSolenoid(0),
  fXdeli(0),
  fYdeli(0),
  fZdeli(0),
  fXn(0),
  fYn(0),
  fZn(0),
  fB(0)
{
  //
  // 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");
}
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
acd84897	16	/* $Id$ */
e2afb3b6	17
5d8718b8	18	//-----------------------------------------------------------------------
	19	// Class for Alice magnetic field with constant mesh
	20	// Used in the configuration macros (macros/Config.C, etc.)
	21	// Author:
	22	//-----------------------------------------------------------------------
fb17acd4	23	#include "TSystem.h"
65fb704d	24	#include "TVector.h"
aee8290b	25
aee8290b	26	#include "AliMagFCM.h"
aee8290b	27
	28	ClassImp(AliMagFCM)
	29
e2afb3b6	30	//_______________________________________________________________________
	31	AliMagFCM::AliMagFCM():
	32	fXbeg(0),
	33	fYbeg(0),
	34	fZbeg(0),
	35	fXdel(0),
	36	fYdel(0),
	37	fZdel(0),
	38	fSolenoid(0),
	39	fXdeli(0),
	40	fYdeli(0),
	41	fZdeli(0),
	42	fXn(0),
	43	fYn(0),
	44	fZn(0),
	45	fB(0)
	46	{
	47	//
	48	// Standard constructor
	49	//
	50	fType = kConMesh;
	51	fMap = 2;
	52	SetSolenoidField();
	53	}
	54
	55	//_______________________________________________________________________
aee8290b	56	AliMagFCM::AliMagFCM(const char name, const char title, const Int_t integ,
e2afb3b6	57	const Float_t factor, const Float_t fmax):
	58	AliMagF(name,title,integ,factor,fmax),
	59	fXbeg(0),
	60	fYbeg(0),
	61	fZbeg(0),
	62	fXdel(0),
	63	fYdel(0),
	64	fZdel(0),
	65	fSolenoid(0),
	66	fXdeli(0),
	67	fYdeli(0),
	68	fZdeli(0),
	69	fXn(0),
	70	fYn(0),
	71	fZn(0),
	72	fB(0)
aee8290b	73	{
	74	//
	75	// Standard constructor
	76	//
	77	fType = kConMesh;
d8408e76	78	fMap = 2;
4cc8933f	79	SetSolenoidField();
4cc8933f	80
e2afb3b6	81	if(fDebug>-1) Info("ctor",
e2afb3b6	82	"%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
9e1a0ddb	83	ClassName(),fName.Data(), fMap, factor,fTitle.Data());
aee8290b	84	}
aee8290b	85
e2afb3b6	86	//_______________________________________________________________________
	87	AliMagFCM::AliMagFCM(const AliMagFCM &magf):
	88	AliMagF(magf),
	89	fXbeg(0),
	90	fYbeg(0),
	91	fZbeg(0),
	92	fXdel(0),
	93	fYdel(0),
	94	fZdel(0),
	95	fSolenoid(0),
	96	fXdeli(0),
	97	fYdeli(0),
	98	fZdeli(0),
	99	fXn(0),
	100	fYn(0),
	101	fZn(0),
	102	fB(0)
aee8290b	103	{
	104	//
	105	// Copy constructor
	106	//
	107	magf.Copy(*this);
	108	}
	109
e2afb3b6	110	//_______________________________________________________________________
aee8290b	111	void AliMagFCM::Field(Float_t x, Float_t b)
	112	{
	113	//
	114	// Method to calculate the magnetic field
	115	//
	116	Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
	117	bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
	118	const Double_t kone=1;
	119	Int_t ix, iy, iz;
	120
	121	// --- find the position in the grid ---
	122
	123	b[0]=b[1]=b[2]=0;
	124	if(-700<x[2] && x[2]<fZbeg && x[0]x[0]+(x[1]+30)(x[1]+30) < 560*560) {
4cc8933f	125	b[2]= fSolenoid;
aee8290b	126	} else {
	127	Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
	128	&& ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
	129	&& ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
	130	if(infield) {
	131	xl[0]=TMath::Abs(x[0])-fXbeg;
	132	xl[1]=TMath::Abs(x[1])-fYbeg;
	133	xl[2]=x[2]-fZbeg;
	134
	135	// --- start with x
	136
	137	hix=xl[0]*fXdeli;
	138	ratx=hix-int(hix);
	139	ix=int(hix);
	140
	141	hiy=xl[1]*fYdeli;
	142	raty=hiy-int(hiy);
	143	iy=int(hiy);
	144
	145	hiz=xl[2]*fZdeli;
	146	ratz=hiz-int(hiz);
	147	iz=int(hiz);
	148
	149	if(fMap==2) {
	150	// ... simple interpolation
	151	ratx1=kone-ratx;
	152	raty1=kone-raty;
	153	ratz1=kone-ratz;
	154	bhyhz = Bx(ix ,iy+1,iz+1)ratx1+Bx(ix+1,iy+1,iz+1)ratx;
	155	bhylz = Bx(ix ,iy+1,iz )ratx1+Bx(ix+1,iy+1,iz )ratx;
	156	blyhz = Bx(ix ,iy ,iz+1)ratx1+Bx(ix+1,iy ,iz+1)ratx;
	157	blylz = Bx(ix ,iy ,iz )ratx1+Bx(ix+1,iy ,iz )ratx;
	158	bhz = blyhz raty1+bhyhz raty;
	159	blz = blylz raty1+bhylz raty;
	160	b[0] = blz ratz1+bhz ratz;
	161	//
	162	bhyhz = By(ix ,iy+1,iz+1)ratx1+By(ix+1,iy+1,iz+1)ratx;
	163	bhylz = By(ix ,iy+1,iz )ratx1+By(ix+1,iy+1,iz )ratx;
	164	blyhz = By(ix ,iy ,iz+1)ratx1+By(ix+1,iy ,iz+1)ratx;
	165	blylz = By(ix ,iy ,iz )ratx1+By(ix+1,iy ,iz )ratx;
	166	bhz = blyhz raty1+bhyhz raty;
	167	blz = blylz raty1+bhylz raty;
	168	b[1] = blz ratz1+bhz ratz;
	169	//
	170	bhyhz = Bz(ix ,iy+1,iz+1)ratx1+Bz(ix+1,iy+1,iz+1)ratx;
	171	bhylz = Bz(ix ,iy+1,iz )ratx1+Bz(ix+1,iy+1,iz )ratx;
	172	blyhz = Bz(ix ,iy ,iz+1)ratx1+Bz(ix+1,iy ,iz+1)ratx;
	173	blylz = Bz(ix ,iy ,iz )ratx1+Bz(ix+1,iy ,iz )ratx;
	174	bhz = blyhz raty1+bhyhz raty;
	175	blz = blylz raty1+bhylz raty;
	176	b[2] = blz ratz1+bhz ratz;
	177	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
	178	//ratx,raty,ratz,b[0],b[1],b[2]);
	179	//
	180	// ... use the dipole symmetry
	181	if (x[0]*x[1] < 0) b[1]=-b[1];
	182	if (x[0]<0) b[2]=-b[2];
	183	} else {
	184	printf("Invalid field map for constant mesh %d\n",fMap);
	185	}
	186	} else {
d95ea23f	187	//This is the ZDC part
d95ea23f	188	Float_t rad2=x[0]x[0]+x[1]x[1];
006cb30c	189	if(x[2]>kCORBEG2 && x[2]<kCOREND2){
d95ea23f	190	if(rad2<kCOR2RA2){
	191	b[0] = kFCORN2;
	192	}
	193	}
	194	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	195	if(rad2<kZ1RA2){
	196	b[0] = -kG1*x[1];
	197	b[1] = -kG1*x[0];
	198	}
	199	}
	200	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	201	if(rad2<kZ2RA2){
	202	b[0] = kG1*x[1];
	203	b[1] = kG1*x[0];
	204	}
	205	}
	206	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	207	if(rad2<kZ3RA2){
	208	b[0] = kG1*x[1];
	209	b[1] = kG1*x[0];
	210	}
	211	}
	212	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	213	if(rad2<kZ4RA2){
	214	b[0] = -kG1*x[1];
	215	b[1] = -kG1*x[0];
	216	}
	217	}
	218	else if(x[2]>kD1BEG && x[2]<kD1END){
	219	if(rad2<kD1RA2){
	220	b[1] = -kFDIP;
	221	}
	222	}
	223	else if(x[2]>kD2BEG && x[2]<kD2END){
	224	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	225	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	226	b[1] = kFDIP;
aee8290b	227	}
aee8290b	228	}
d95ea23f	229
d95ea23f	230	}
aee8290b	231	}
	232	if(fFactor!=1) {
	233	b[0]*=fFactor;
	234	b[1]*=fFactor;
	235	b[2]*=fFactor;
	236	}
	237	}
	238
e2afb3b6	239	//_______________________________________________________________________
aee8290b	240	void AliMagFCM::ReadField()
	241	{
	242	//
	243	// Method to read the magnetic field map from file
	244	//
	245	FILE *magfile;
	246	Int_t ix, iy, iz, ipx, ipy, ipz;
	247	Float_t bx, by, bz;
	248	char *fname;
9e1a0ddb	249	if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),fName.Data(),fTitle.Data());
aee8290b	250	fname = gSystem->ExpandPathName(fTitle.Data());
	251	magfile=fopen(fname,"r");
	252	delete [] fname;
	253	if (magfile) {
	254	fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
	255	&fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
9e1a0ddb	256	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	257	ClassName(),fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
aee8290b	258	fXdeli=1./fXdel;
	259	fYdeli=1./fYdel;
	260	fZdeli=1./fZdel;
	261	fB = new TVector(3fXnfYn*fZn);
	262	for (iz=0; iz<fZn; iz++) {
	263	ipz=iz3(fXn*fYn);
	264	for (iy=0; iy<fYn; iy++) {
	265	ipy=ipz+iy3fXn;
	266	for (ix=0; ix<fXn; ix++) {
	267	ipx=ipy+ix*3;
	268	fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	269	(*fB)(ipx+2)=bz;
	270	(*fB)(ipx+1)=by;
	271	(*fB)(ipx )=bx;
	272	}
	273	}
	274	}
	275	} else {
9e1a0ddb	276	printf("%s: File %s not found !\n",ClassName(),fTitle.Data());
aee8290b	277	exit(1);
	278	}
	279	}
	280
e2afb3b6	281	//_______________________________________________________________________
8918e700	282	void AliMagFCM::Copy(AliMagFCM & /* magf */) const
aee8290b	283	{
aee8290b	284	//
8918e700	285	// Copy *this onto magf -- Not implemented
aee8290b	286	//
	287	Fatal("Copy","Not implemented!\n");
	288	}
	289