1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
18 Revision 1.2 2000/05/18 13:45:57 jbarbosa
19 Fixed feedback photon origin coordinates
21 Revision 1.1 2000/04/19 12:57:20 morsch
22 Newly structured and updated version (JB, AM)
27 #include "AliRICHChamber.h"
29 #include <TLorentzVector.h>
30 #include <TParticle.h>
33 ClassImp(AliRICHChamber)
35 AliRICHChamber::AliRICHChamber()
39 // Chamber object constructor
49 AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
55 AliRICHResponse* AliRICHChamber::GetResponseModel()
58 // Get reference to response model
62 void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
64 // Configure response model
65 fResponse=thisResponse;
68 void AliRICHChamber::Init()
70 // Initialise chambers
71 fSegmentation->Init(this);
74 void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
77 // Local coordinates to global coordinates transformation
80 fMatrix = fChamberMatrix->GetMatrix();
81 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
82 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
83 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
84 Globalpos[0]+=fChamberTrans[0];
85 Globalpos[1]+=fChamberTrans[1];
86 Globalpos[2]+=fChamberTrans[2];
89 void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
92 // Global coordinates to local coordinates transformation
94 Double_t *fMatrixOrig;
95 TMatrix fMatrixCopy(3,3);
96 fMatrixOrig = fChamberMatrix->GetMatrix();
97 for(Int_t i=0;i<3;i++)
99 for(Int_t j=0;j<3;j++)
100 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
102 fMatrixCopy.Invert();
103 //Int_t elements=fMatrixCopy.GetNoElements();
104 //printf("Elements:%d\n",elements);
105 //fMatrixOrig= (Double_t*) fMatrixCopy;
106 Localpos[0] = pos[0] - fChamberTrans[0];
107 Localpos[1] = pos[1] - fChamberTrans[1];
108 Localpos[2] = pos[2] - fChamberTrans[2];
109 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
110 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
111 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
112 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
113 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
114 //Localpos[0]-=fChamberTrans[0];
115 //Localpos[1]-=fChamberTrans[1];
116 //Localpos[2]-=fChamberTrans[2];
120 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
121 Int_t& nnew,Float_t newclust[6][500],ResponseType res)
124 // Generates pad hits (simulated cluster)
125 // using the segmentation and the response model
132 // Width of the integration area
134 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
135 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
137 // Get pulse height from energy loss and generate feedback photons
141 // z-position of the wires relative to the RICH mother volume
142 // (2 mmm before CsI) old value: 6.076
143 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
144 //printf("AliRICHChamber feedback origin:%f",local[1]);
147 LocaltoGlobal(local,global);
152 qtot = fResponse->IntPH(eloss);
153 nFp = fResponse->FeedBackPhotons(global,qtot);
154 } else if (res==kCerenkov) {
155 qtot = fResponse->IntPH();
156 nFp = fResponse->FeedBackPhotons(global,qtot);
159 //printf("Feedbacks:%d\n",nFp);
164 Float_t qcheck=0, qp=0;
167 for (Int_t i=1; i<=fnsec; i++) {
169 for (fSegmentation->FirstPad(xhit, yhit, dx, dy);
170 fSegmentation->MorePads();
171 fSegmentation->NextPad())
173 qp= fResponse->IntXY(fSegmentation);
176 //printf("Qp:%f\n",qp);
181 // --- store signal information
182 newclust[0][nnew]=qtot;
183 newclust[1][nnew]=fSegmentation->Ix();
184 newclust[2][nnew]=fSegmentation->Iy();
185 newclust[3][nnew]=qp * qtot;
186 newclust[4][nnew]=fSegmentation->ISector();
187 newclust[5][nnew]=(Float_t) i;
189 //printf("Newcluster:%d\n",i);
192 } // Cathode plane loop
193 //if (fSegmentation->ISector()==2)
194 //printf("Nnew:%d\n\n\n\n",nnew);
198 AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
200 // Assignment operator