/* $Id$ */
-#include <TMath.h>
#include "AliMUONConstants.h"
+#include "AliLog.h"
+
+#include "TMath.h"
+#include "TClass.h"
+#include "AliMpConstants.h"
+
+//-----------------------------------------------------------------------------
+/// \class AliMUONConstants
+/// This class holds various constants to be used in many places,
+/// such as the number of tracking and trigger chambers,
+/// some geometrical constants (to build the initial geometry for simulation)
+/// and mathieson distribution default values.
+/// Those constants should as much as possible replace hard-coded values
+/// which are to be considered strictly illegal in the MUON code (or any code,
+/// by the way).
+//-----------------------------------------------------------------------------
+
+/// \cond CLASSIMP
ClassImp(AliMUONConstants)
+/// \endcond
-Int_t AliMUONConstants::fgNCh = 14;
-Int_t AliMUONConstants::fgNTrackingCh = 10;
-Int_t AliMUONConstants::fgNTriggerCh = 4;
+Int_t AliMUONConstants::fgNTrackingSt = 5;
Int_t AliMUONConstants::fgNTriggerCircuit = 234;
Int_t AliMUONConstants::fgNDetElem = 228;
-
-
+Int_t AliMUONConstants::fgNGeomModules = 20;
+Float_t AliMUONConstants::fgkTriggerTofLimit = 75E-9;
Float_t AliMUONConstants::fgDefaultChamberZ[14] =
{-526.16, -545.24, -676.4, -695.4, // St12
-967.5, -998.5, -1276.5, -1307.5, -1406.6, -1437.6,// updated 08/05, EDMS id 335328 (A. Tournaire)
-1603.5, -1620.5, -1703.5, -1720.5}; // M1 & M2
+
+// These are used by AliMUONConstants::ChamberNumber and must be calculated once
+// by that method from fgDzCh, fgDzSlat, fgDefaultChamberZ and fgSt345inclination,
+// so for now we set everything to zero.
+Float_t AliMUONConstants::fgDefaultChamberMinZ[14] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+Float_t AliMUONConstants::fgDefaultChamberMaxZ[14] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
Float_t AliMUONConstants::fgDefaultRatioTriggerChamber[4] =
{1., 1.01060, 1.06236, 1.07296};
// From Alain TOURNAIRE
// ALICE / ALICE Engineering baseline / Dimuonspectrometer (DIS) v7-1
// EDMS Id 335328 for "search in EDMS
-// These are the diameter (innner and ounner) values of the active surface
-Float_t AliMUONConstants::fgDmin[7] = { 36.4, 46.2, 63.0, 79.0, 79.0, 99.0, 100.0};
-Float_t AliMUONConstants::fgDmax[7] = { 176.6, 229.0, 308.84, 418.2, 522.0, 850.0, 900.0};
+// These are the diameter (Dmin == innner and Dmax - outner) values of the active surface
+// In the case of Dmax, the value corresponds to the maximum diameter of the active surface with 2pi coverture in phi
+Float_t AliMUONConstants::fgDmin[7] = { 36.4, 46.2, 63.0, 79.0, 79.0, 99.0, 100.0}; // cm
+Float_t AliMUONConstants::fgDmax[7] = { 176.6, 229.0, 308.84, 418.2, 522.0, 850.0, 900.0}; // cm
Int_t AliMUONConstants::fgMaxZoom = 20;
+// Defaults parameters for dipole magnet
+// From ALICE Dimuon - parameters / geometry table,
+// V7-3 (version 7 created 24/03/2004 updated 25/10/2005)
+Double_t AliMUONConstants::fgCoilZ = -994.05;
+Double_t AliMUONConstants::fgCoilL = 502.1;
+Double_t AliMUONConstants::fgYokeZ = -986.6;
+Double_t AliMUONConstants::fgYokeL = 309.4;
+
+// Defaults parameters for absorber (27/06/07)
+const Double_t AliMUONConstants::fgkAbsZBeg = -90.;
+const Double_t AliMUONConstants::fgkAbsZEnd = -505.;
+
+// Default chamber resolution (cm)
+const Double_t AliMUONConstants::fgkDefaultNonBendingReso = 0.144;
+const Double_t AliMUONConstants::fgkDefaultBendingReso = 0.01;
+
+// Defaults parameters for track reconstruction
+Double_t AliMUONConstants::fgChamberThicknessInX0 = 0.03;
+
//______________________________________________________________________________
-Int_t AliMUONConstants::ChamberNumber(Float_t z)
+Int_t AliMUONConstants::NCh()
+{
+ return AliMpConstants::NofChambers();
+}
+
+//______________________________________________________________________________
+Int_t AliMUONConstants::NTrackingCh()
+{
+ return AliMpConstants::NofTrackingChambers();
+}
+
+//______________________________________________________________________________
+Int_t AliMUONConstants::ChamberNumber(Float_t z, bool warn)
{
// return chamber number according z position of hit. Should be taken from geometry ?
-
- Float_t dMaxChamber = DzSlat() + DzCh() + 0.25; // cm st 3 &4 & 5
- if ( z > (DefaultChamberZ(4)+50.)) dMaxChamber = 7.; // cm stations 1 & 2
- Int_t iChamber;
- for (iChamber = 0; iChamber < 10; iChamber++) {
-
- if (TMath::Abs(z-DefaultChamberZ(iChamber)) < dMaxChamber) {
- return iChamber;
+ if (fgDefaultChamberMinZ[0] == 0) // Are the min/max Z arrays initialised?
+ {
+ // The min and max Z arrays need to be calculated.
+ for (Int_t i = 0; i < NCh(); i++)
+ {
+ Float_t a = 0, b = 0;
+ if (4 <= i and i < 10)
+ {
+ Float_t dzAngle = TMath::Tan(TMath::Pi()*St345Inclination()/180.) * Rmax(i/2);
+ // We add 2.5mm since Rmax is an under-estimate.
+ a = DefaultChamberZ(i) + DzSlat() + DzCh() + dzAngle + 0.25;
+ b = DefaultChamberZ(i) - DzSlat() - DzCh() - dzAngle - 0.25;
+ }
+ else
+ {
+ a = DefaultChamberZ(i) + DzSlat();
+ b = DefaultChamberZ(i) - DzSlat();
+ }
+ fgDefaultChamberMinZ[i] = TMath::Min(a, b);
+ fgDefaultChamberMaxZ[i] = TMath::Max(a, b);
}
}
+
+ // We can apply a binary search for the chamber since the fgDefaultChamberMinZ and
+ // fgDefaultChamberMaxZ arrays are ordered.
+ Int_t mini = 0, maxi = NCh()-1;
+ while (mini <= maxi)
+ {
+ Int_t iChamber = (maxi + mini) / 2;
+ if (z < fgDefaultChamberMinZ[iChamber])
+ mini = iChamber+1;
+ else if (z > fgDefaultChamberMaxZ[iChamber])
+ maxi = iChamber-1;
+ else
+ // We are between min and max Z of chamber number iChamber so we found our chamber.
+ return iChamber;
+ }
+
+ if (warn) AliWarningClass(Form("No chamber number found for z = %f",z));
return -1;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff