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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8 * documentation strictly for non-commercial purposes is hereby granted *
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12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
18 Revision 1.3 2000/06/12 15:17:58 jbarbosa
21 Revision 1.2 2000/05/18 13:45:57 jbarbosa
22 Fixed feedback photon origin coordinates
24 Revision 1.1 2000/04/19 12:57:20 morsch
25 Newly structured and updated version (JB, AM)
30 #include "AliRICHChamber.h"
32 #include <TLorentzVector.h>
33 #include <TParticle.h>
36 ClassImp(AliRICHChamber)
38 AliRICHChamber::AliRICHChamber()
42 // Chamber object constructor
54 AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
60 AliRICHResponse* AliRICHChamber::GetResponseModel()
63 // Get reference to response model
67 void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
69 // Configure response model
70 fResponse=thisResponse;
73 void AliRICHChamber::Init()
75 // Initialise chambers
76 fSegmentation->Init(this);
79 void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
82 // Local coordinates to global coordinates transformation
85 fMatrix = fChamberMatrix->GetMatrix();
86 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
87 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
88 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
89 Globalpos[0]+=fChamberTrans[0];
90 Globalpos[1]+=fChamberTrans[1];
91 Globalpos[2]+=fChamberTrans[2];
94 void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
97 // Global coordinates to local coordinates transformation
99 Double_t *fMatrixOrig;
100 TMatrix fMatrixCopy(3,3);
101 fMatrixOrig = fChamberMatrix->GetMatrix();
102 for(Int_t i=0;i<3;i++)
104 for(Int_t j=0;j<3;j++)
105 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
107 fMatrixCopy.Invert();
108 //Int_t elements=fMatrixCopy.GetNoElements();
109 //printf("Elements:%d\n",elements);
110 //fMatrixOrig= (Double_t*) fMatrixCopy;
111 Localpos[0] = pos[0] - fChamberTrans[0];
112 Localpos[1] = pos[1] - fChamberTrans[1];
113 Localpos[2] = pos[2] - fChamberTrans[2];
114 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
115 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
116 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
117 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
118 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
119 //Localpos[0]-=fChamberTrans[0];
120 //Localpos[1]-=fChamberTrans[1];
121 //Localpos[2]-=fChamberTrans[2];
125 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
126 Int_t& nnew,Float_t newclust[6][500],ResponseType res)
129 // Generates pad hits (simulated cluster)
130 // using the segmentation and the response model
137 // Width of the integration area
139 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
140 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
142 // Get pulse height from energy loss and generate feedback photons
146 // z-position of the wires relative to the RICH mother volume
147 // (2 mmm before CsI) old value: 6.076
148 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
149 //printf("AliRICHChamber feedback origin:%f",local[1]);
152 LocaltoGlobal(local,global);
157 qtot = fResponse->IntPH(eloss);
158 nFp = fResponse->FeedBackPhotons(global,qtot);
159 } else if (res==kCerenkov) {
160 qtot = fResponse->IntPH();
161 nFp = fResponse->FeedBackPhotons(global,qtot);
164 //printf("Feedbacks:%d\n",nFp);
169 Float_t qcheck=0, qp=0;
172 for (Int_t i=1; i<=fnsec; i++) {
174 for (fSegmentation->FirstPad(xhit, yhit, dx, dy);
175 fSegmentation->MorePads();
176 fSegmentation->NextPad())
178 qp= fResponse->IntXY(fSegmentation);
181 //printf("Qp:%f\n",qp);
186 // --- store signal information
187 newclust[0][nnew]=qtot;
188 newclust[1][nnew]=fSegmentation->Ix();
189 newclust[2][nnew]=fSegmentation->Iy();
190 newclust[3][nnew]=qp * qtot;
191 newclust[4][nnew]=fSegmentation->ISector();
192 newclust[5][nnew]=(Float_t) i;
194 //printf("Newcluster:%d\n",i);
197 } // Cathode plane loop
198 //if (fSegmentation->ISector()==2)
199 //printf("Nnew:%d\n\n\n\n",nnew);
203 AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
205 // Assignment operator
211 void AliRICHChamber::GenerateTresholds()
214 // Generates random treshold charges for all pads
216 //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy());
218 Int_t nx = fSegmentation->Npx();
219 Int_t ny = fSegmentation->Npy();
223 //printf("Size:%d\n",size);
225 fTresh = new AliRICHTresholdMap(fSegmentation);
227 //printf("Generating tresholds...\n");
229 for(Int_t i=-nx/2;i<nx/2;i++)
231 for(Int_t j=-ny/2;j<ny/2;j++)
233 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
235 fTresh->SetHit(i,j,pedestal);
236 //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal);