* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.12 2001/05/28 14:10:35 morsch
-SetSolenoidField method to set the L3 field strength. 2 kG is default.
+/* $Id$ */
-Revision 1.11 2001/02/08 13:18:00 hristov
-Print removed (J.Gosset)
-
-Revision 1.10 2001/01/18 13:21:30 morsch
-Take pi from TMath.
-
-Revision 1.9 2001/01/17 20:02:20 morsch
-In the AliMagFDM tree call-by-reference functions were changed to
-call-by-value, what is more adequate for our task. There were added
-a few comments and put protection to values of cos > 1.000 in
-AliMagFDM.cxx. (Galina Chabratova)
-
-Revision 1.8 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 1.7 2000/12/01 11:20:27 alibrary
-Corrector dipole removed from ZDC
-
-Revision 1.6 2000/11/10 18:09:55 fca
-New field map for the ZDC
-
-Revision 1.5 2000/10/27 14:17:04 morsch
-- Bug causing segmentation violation during muon reconstruction corrected
-- Coding rule violations corrected.
-(Galina Chabratova)
-
-Revision 1.4 2000/10/02 21:28:14 fca
-Removal of useless dependecies via forward declarations
-
-Revision 1.3 2000/07/13 16:19:09 fca
-Mainly coding conventions + some small bug fixes
-
-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
-
-*/
+//-------------------------------------------------------------------------
+// Field with Magnetic Field map
+// Used by AliRun class
+// Author:
+//-------------------------------------------------------------------------
#include <stdlib.h>
#include "TSystem.h"
#include "AliMagFDM.h"
-
ClassImp(AliMagFDM)
}
//_______________________________________________________________________
-AliMagFDM::AliMagFDM(const char *name, const char *title, const Int_t integ,
- const Float_t factor, const Float_t fmax):
- AliMagF(name,title,integ,factor,fmax),
+AliMagFDM::AliMagFDM(const char *name, const char *title, Int_t integ,
+ Float_t factor, Float_t fmax):
+ AliMagFC(name,title,integ,factor,fmax),
fSolenoid(0),
fInd(0),
fZmin(0),
// Main routine to compute the field in a point
//
const Double_t keps=0.1E-06;
- const Double_t PI2=2.*TMath::Pi();
+ const Double_t kPI2=2.*TMath::Pi();
const Double_t kone=1;
const Int_t kiip=33;
Double_t zz1, zz2,yy1,yy2,x2,x1;
// --- start the map fiel from z = 502.92 cm ---
+//
+// This map has been calculated in a coordinate system in which the muon spectrometer sits at z > 0
+// Transfor correspondingly.
- x[0] = xfi[0];
- x[1] = xfi[1];
- x[2] = xfi[2];
+ x[0] = - xfi[0];
+ x[1] = xfi[1];
+ x[2] = - xfi[2];
b[0]=b[1]=b[2]=0;
+//
// printf("x[0] %f,x[1] %f,x[2] %f\n",x[0],x[1],x[2]);
Double_t rr=TMath::Sqrt(x[0]*x[0]+x[1]*x[1]);
kcphi=777;
}
ph0=TMath::ACos(cphi);
- if (xL3[0] < 0 && yyp > 0 ) {ph0=PI2/2 - ph0;}
- if (xL3[0] < 0 && yyp < 0 ) {ph0=PI2/2 + ph0;}
- if (xL3[0] > 0 && yyp < 0 ) {ph0=PI2 - ph0;}
- if (ph0 > PI2) { ph0=ph0 - PI2;}
+ if (xL3[0] < 0 && yyp > 0 ) {ph0=kPI2/2 - ph0;}
+ if (xL3[0] < 0 && yyp < 0 ) {ph0=kPI2/2 + ph0;}
+ if (xL3[0] > 0 && yyp < 0 ) {ph0=kPI2 - ph0;}
+ if (ph0 > kPI2) { ph0=ph0 - kPI2;}
if (kcphi==777) {
printf("xL3[0] %e, xL3[1] %e, xL3[2] %e, yyp %e, r0 %e, ph0 %e\n",xL3[0],xL3[1],xL3[2],yyp,r0,ph0);
}
}
}
- b[0]=bint[0];
+ b[0]=-bint[0];
b[1]=bint[1];
- b[2]=bint[2];
+ b[2]=-bint[2];
}
else
bint[jb-3] = Bb(zz1,zz2,yy1,yy2,x1,x2,iKvar,k0, l0, m0)*10 ;
}
- b[0]=bint[0];
+ b[0]=-bint[0];
b[1]=bint[1];
- b[2]=bint[2];
+ b[2]=-bint[2];
}
}
} else {
+ ZDCField(xfi,b);
-//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;
//_______________________________________________________________________
Int_t AliMagFDM::FZ(Double_t temp, Float_t *Ar,
- Float_t delu, Int_t ik,Int_t nk)
+ Float_t delu, Int_t ik,Int_t nk) const
{
//
// Quest of a point position at x,y,z (Cartensian) and R,Phi,z (Polar) axises
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff