Correction of sign of quatrupole gradients and updates to LHC optics v6.5.

(Chiara Oppedisano)

diff --git a/STEER/AliMagFC.cxx b/STEER/AliMagFC.cxx
index bd00909e98a1d0e1abf66fbe5e329ac6517be1d8..0233b0296865c9c8f21ef2f3f1aa6fb0adcaca31 100644 (file)
--- a/STEER/AliMagFC.cxx
+++ b/STEER/AliMagFC.cxx
@@ -83,25 +83,25 @@ void AliMagFC::ZDCField(Float_t *x, Float_t *b) const
     else if(x[2] < kZ1BEG && x[2] > kZ1END){  
        if(rad2<kZ1RA2){
            b[0] =  kG1*x[1];
-           b[1] = -kG1*x[0];
+           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];
+           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];
+           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];
+           b[1] =  kG1*x[0];
        }
     }
     else if(x[2] < kD1BEG && x[2] > kD1END){ 

diff --git a/STEER/AliMagFC.h b/STEER/AliMagFC.h
index 5580f8adcf4b02e70be2f9b230ec73c491e4396e..8f540a955e36fe93bc98cbd5165226dea26c6494 100644 (file)
--- a/STEER/AliMagFC.h
+++ b/STEER/AliMagFC.h
@@ -31,9 +31,9 @@ public:
 
 //ZDC part -------------------------------------------------------------------
 
-// ************************ LHC optics v6.4 *****************************
-static const Float_t kG1=20.443;
-static const Float_t kFDIP=-37.85;
+// ************************ LHC optics v6.5 *****************************
+static const Float_t kG1=20.757;
+static const Float_t kFDIP=-37.866;
 static const Float_t kFCORN2=-9.6979; 
 //
 // ZBEG       Beginning of the inner triplet