X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=MUON%2FAliMUONConstants.cxx;h=6ba88928659a256e71b7920a1c218e6c615b18ff;hp=e66a0edbb6f58e0bb6ed0da3299c10131430e4f9;hb=52a564eeeed3ad431eba15a08cfc0a5f4594e891;hpb=e516b01dc9b050949d85a6e082e9213ee783c82c diff --git a/MUON/AliMUONConstants.cxx b/MUON/AliMUONConstants.cxx index e66a0edbb6f..6ba88928659 100644 --- a/MUON/AliMUONConstants.cxx +++ b/MUON/AliMUONConstants.cxx @@ -17,43 +17,184 @@ #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::fgNofDetElements[14] = -{ 4, 4, 4, 4, 18, 18, 26, 26, 26, 26, 18, 18, 18, 18 }; +Int_t AliMUONConstants::fgNDetElem = 228; +Int_t AliMUONConstants::fgNGeomModules = 20; +Float_t AliMUONConstants::fgkTriggerTofLimit = 75E-9; Float_t AliMUONConstants::fgDefaultChamberZ[14] = - {-533.5, -546.5, -678.5, -693.5, // St12 - -966.9, -997.9, -1274.5, -1305.5, -1408.6, -1439.6, // St345 update sept04 Ch. Finck + {-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}; + + +Float_t AliMUONConstants::fgSt345inclination = 0.794; // in degrees, rotation axis is X axis + Float_t AliMUONConstants::fgDzCh = 15.5/2.; Float_t AliMUONConstants::fgDzSlat = 8.5/2.; +Float_t AliMUONConstants::fgSqrtKx3 = 0.7131; +Float_t AliMUONConstants::fgSqrtKy3 = 0.7642; + +Float_t AliMUONConstants::fgSqrtKx3St1 = 0.7000; +Float_t AliMUONConstants::fgSqrtKy3St1 = 0.7550; + +Float_t AliMUONConstants::fgChargeCorrel = 0.11; +Float_t AliMUONConstants::fgChargeCorrelSt1 = 1.0; //??? +Float_t AliMUONConstants::fgPitch = 0.25; +Float_t AliMUONConstants::fgPitchSt1 = 0.21; + +// From Alain TOURNAIRE +// ALICE / ALICE Engineering baseline / Dimuonspectrometer (DIS) v7-1 +// EDMS Id 335328 for "search in EDMS +// 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, 98.8, 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 trigger chamber resolution (cm) +// Warning: the resolution refers only to ALIGNMENT +// For the total resolution the strip width should be taken into account! +const Double_t AliMUONConstants::fgkTriggerNonBendingReso = 0.2; +const Double_t AliMUONConstants::fgkTriggerBendingReso = 0.2; + +// Defaults parameters for muon filter (19/11/07) +const Double_t AliMUONConstants::fgkMuonFilterZBeg = -1471.; +const Double_t AliMUONConstants::fgkMuonFilterZEnd = -1471.-120.; +const Double_t AliMUONConstants::fgkMuonFilterX0 = 1.76; -Float_t AliMUONConstants::fgDmin[7] = { 36.4, 46.2, 66.0, 80., 80., 100., 100.}; -Float_t AliMUONConstants::fgDmax[7] = {183., 245., 395., 560., 563., 850., 900.}; -Int_t AliMUONConstants::fgMaxZoom = 20; +// Defaults parameters for track reconstruction +Double_t AliMUONConstants::fgChamberThicknessInX0[10] = {0.065, 0.065, 0.075, 0.075, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035}; + +const Double_t AliMUONConstants::fgkMostProbBendingMomentum = 2.0; + +Float_t AliMUONConstants::fgAverageChamberT[14]= + {17.64*1E-9, 18.28*1E-9, 22.68*1E-9, 23.33*1E-9, 32.42*1E-9, 33.48*1E-9, 42.76*1E-9, + 43.81*1E-9, 47.13*1E-9, 48.17*1E-9, 53.75*1E-9, 54.32*1E-9, 57.12*1E-9, 57.67*1E-9}; + +// is equivalent to gain = 4 mV/fC +const Float_t AliMUONConstants::fgkDefaultA0 = 1.25; +// 1 ADC channel = 0.61 mV +const Float_t AliMUONConstants::fgkDefaultADC2MV = 0.61; +const Float_t AliMUONConstants::fgkDefaultCapa = 0.2; //______________________________________________________________________________ -Int_t AliMUONConstants::GetChamberId(Int_t detElemId) -{ -// Get chamber Id from detection element Id -// --- +Int_t AliMUONConstants::NCh() +{ + return AliMpConstants::NofChambers(); +} - return detElemId/100 - 1; -} +//______________________________________________________________________________ +Int_t AliMUONConstants::NTrackingCh() +{ + return AliMpConstants::NofTrackingChambers(); +} //______________________________________________________________________________ -Int_t AliMUONConstants::GetFirstDetElemId(Int_t chamberId) +Int_t AliMUONConstants::ChamberNumber(Float_t z, bool warn) { -// Get first detection element Id for chamber specified by chamber Id -// --- + // return chamber number according z position of hit. Should be taken from geometry ? + + 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); + } + } - return (chamberId+1)*100; -} + // 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; +} + +//______________________________________________________________________________ +Float_t AliMUONConstants::ReducedQTot(Float_t qtot, Float_t timeDif) +{ + // return a reduced charge if the hit belongs to a track from a pileup event + Float_t q = qtot*1.19*(1.24-timeDif*1E6)*TMath::Exp(-(0.97-timeDif*1E6)*(0.97-timeDif*1E6)/2.42); + return q; +} + +//______________________________________________________________________________ +Float_t AliMUONConstants::FC2ADC() { + // Return conversionfactor fc to adc + Float_t fc2adc = 1./(DefaultA0()*DefaultCapa()*DefaultADC2MV()); + + return fc2adc; +}