updated documentation

[u/mrichter/AliRoot.git] / TPC / AliTPCExBFirst.h

diff --git a/TPC/AliTPCExBFirst.h b/TPC/AliTPCExBFirst.h
index 350ba015ba044c76def6d8897875365d1f648b46..a9ec9bce59d49854b6d79ce66ee56a94a1d4e37c 100644 (file)
--- a/TPC/AliTPCExBFirst.h
+++ b/TPC/AliTPCExBFirst.h
@@ -1,9 +1,16 @@
-#ifndef ALITPC_EXB_FIRST_H
-#define ALITPC_EXB_FIRST_H
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice                               */
+
+////
+// An approximate (first order) implementation of the ExB effect.
+////
+
+#ifndef ALITPCEXBFIRST_H
+#define ALITPCEXBFIRST_H
 
 #include "AliTPCExB.h"
-#include "AliFieldMap.h"
-#include "AliMagF.h"
+class AliFieldMap;
+class AliMagF;
 
 class AliTPCExBFirst:public AliTPCExB {
 public:
@@ -35,8 +42,8 @@ private:
   Double_t fkZMin;    // the first grid point in z direction
   Double_t fkZMax;    // the last grid point in z direction
   Int_t fkNMean;      // size of the tablE the mean fields
-  Float_t *fkMeanBx; //[fkNMean] the mean field in x direction upto a certain z value
-  Float_t *fkMeanBy; //[fkNMean] the mean field in y direction upto a certain z value
+  Double_t *fkMeanBx; //[fkNMean] the mean field in x direction upto a certain z value
+  Double_t *fkMeanBy; //[fkNMean] the mean field in y direction upto a certain z value
   Double_t fkMeanBz;  // the mean field in z direction inside the TPC volume
   static const Double_t fgkEM; //! elementary charge over electron mass (C/kg)
   static const Double_t fgkDriftField; //! the TPC drift field (V/m) (modulus)