/* $Id$ */
//-------------------------------------------------------------------------
-//
// 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),
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]);
}
}
- 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;