* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.3 2000/11/10 18:09:55 fca
-New field map for the ZDC
+/* $Id$ */
-Revision 1.2 2000/07/12 08:56:25 fca
-Coding convention correction and warning removal
+//-------------------------------------------------------------------------
+// Constant magnetic field class
+// Used by AliRun class
+// Author:
+//-------------------------------------------------------------------------
-Revision 1.1 2000/07/11 18:24:59 fca
-Coding convention corrections + few minor bug fixes
-
-*/
+#include <stdlib.h>
+#include "AliLog.h"
#include "AliMagFC.h"
-#include <stdlib.h>
ClassImp(AliMagFC)
//________________________________________
-AliMagFC::AliMagFC(const char *name, const char *title, const Int_t integ,
- const Int_t map, const Float_t factor, const Float_t fmax)
- : AliMagF(name,title,integ,map,factor,fmax)
+AliMagFC::AliMagFC(const char *name, const char *title, Int_t integ,
+ Float_t factor, Float_t fmax)
+ : AliMagF(name,title,integ,factor,fmax)
{
//
// Standard constructor
//
- printf("Constant Field %s created: map= %d, factor= %f\n",fName.Data(),map,
- factor);
fType = kConst;
+ fMap = 1;
}
//________________________________________
-void AliMagFC::Field(Float_t *x, Float_t *b)
+void AliMagFC::Field(Float_t *x, Float_t *b) const
{
//
// Method to return the field in a point
if(TMath::Abs(x[2])<700 && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) {
b[2]=2;
} else {
- if ( 725 <= x[2] && x[2] <= 1225 ) {
- Float_t dz = TMath::Abs(975-x[2])*0.01;
- b[0]=(1-0.1*dz*dz)*7;
+ if ( -725 >= x[2] && x[2] >= -1225 ) {
+ Float_t dz = TMath::Abs(-975-x[2])*0.01;
+ b[0] = - (1-0.1*dz*dz)*7;
}
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;
+ ZDCField(x, b);
}
}
- else if(x[2]>kZ1BEG && x[2]<kZ1END){
- if(rad2<kZ1RA2){
- b[0] = -kG1*x[1];
- b[1] = -kG1*x[0];
- }
+ if(fFactor!=1) {
+ b[0]*=fFactor;
+ b[1]*=fFactor;
+ b[2]*=fFactor;
}
- else if(x[2]>kZ2BEG && x[2]<kZ2END){
- if(rad2<kZ2RA2){
- b[0] = kG1*x[1];
- b[1] = kG1*x[0];
- }
+ } else {
+ AliFatal(Form("Invalid field map for constant field %d",fMap));
+ }
+}
+
+
+void AliMagFC::ZDCField(Float_t *x, Float_t *b) const
+{
+//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]>kZ3BEG && x[2]<kZ3END){
- if(rad2<kZ3RA2){
- b[0] = kG1*x[1];
- b[1] = kG1*x[0];
- }
+ 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]>kZ4BEG && x[2]<kZ4END){
- if(rad2<kZ4RA2){
- 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]>kD1BEG && x[2]<kD1END){
- if(rad2<kD1RA2){
- b[1] = -kFDIP;
- }
+ 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]>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;
- }
+ 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;
+ }
}
- if(fFactor!=1) {
- b[0]*=fFactor;
- b[1]*=fFactor;
- b[2]*=fFactor;
+ 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;
+ }
}
- } else {
- printf("Invalid field map for constant field %d\n",fMap);
- exit(1);
- }
+
}
-