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. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
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10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 Revision 1.9 2001/02/13 20:15:34 jbarbosa
19 Removed fNsec (number of cathodes - obsolete) related loops and calls.
21 Revision 1.8 2000/12/18 17:45:43 jbarbosa
22 Cleaned up PadHits object.
24 Revision 1.7 2000/10/03 21:44:09 morsch
25 Use AliSegmentation and AliHit abstract base classes.
27 Revision 1.6 2000/10/02 15:44:37 jbarbosa
28 Fixed forward declarations.
30 Revision 1.5 2000/07/13 16:19:45 fca
31 Mainly coding conventions + some small bug fixes
33 Revision 1.4 2000/06/30 16:48:58 dibari
34 New function GenerateTresholds() for pedestal simulation.
36 Revision 1.3 2000/06/12 15:17:58 jbarbosa
39 Revision 1.2 2000/05/18 13:45:57 jbarbosa
40 Fixed feedback photon origin coordinates
42 Revision 1.1 2000/04/19 12:57:20 morsch
43 Newly structured and updated version (JB, AM)
48 #include "AliRICHChamber.h"
50 #include <TLorentzVector.h>
51 #include <TParticle.h>
53 #include <TObjArray.h>
54 #include <TRotMatrix.h>
55 #include <AliRICHTresholdMap.h>
56 #include <AliSegmentation.h>
57 #include <AliRICHSegmentationV0.h>
58 #include <AliRICHGeometry.h>
59 #include <AliRICHResponse.h>
61 ClassImp(AliRICHChamber)
63 AliRICHChamber::AliRICHChamber()
67 // Chamber object constructor
75 for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0;
78 AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
84 AliRICHResponse* AliRICHChamber::GetResponseModel()
87 // Get reference to response model
91 void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
93 // Configure response model
94 fResponse=thisResponse;
97 void AliRICHChamber::Init(Int_t id)
99 // Initialise chambers
100 fSegmentation->Init(id);
103 void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
106 // Local coordinates to global coordinates transformation
109 fMatrix = fChamberMatrix->GetMatrix();
110 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
111 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
112 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
113 Globalpos[0]+=fChamberTrans[0];
114 Globalpos[1]+=fChamberTrans[1];
115 Globalpos[2]+=fChamberTrans[2];
118 void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
121 // Global coordinates to local coordinates transformation
123 Double_t *fMatrixOrig;
124 TMatrix fMatrixCopy(3,3);
125 fMatrixOrig = fChamberMatrix->GetMatrix();
126 for(Int_t i=0;i<3;i++)
128 for(Int_t j=0;j<3;j++)
129 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
131 fMatrixCopy.Invert();
132 //Int_t elements=fMatrixCopy.GetNoElements();
133 //printf("Elements:%d\n",elements);
134 //fMatrixOrig= (Double_t*) fMatrixCopy;
135 Localpos[0] = pos[0] - fChamberTrans[0];
136 Localpos[1] = pos[1] - fChamberTrans[1];
137 Localpos[2] = pos[2] - fChamberTrans[2];
138 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
139 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
140 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
141 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
142 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
143 //Localpos[0]-=fChamberTrans[0];
144 //Localpos[1]-=fChamberTrans[1];
145 //Localpos[2]-=fChamberTrans[2];
149 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
150 Int_t& nnew,Float_t newclust[5][500],ResponseType res)
153 // Generates pad hits (simulated cluster)
154 // using the segmentation and the response model
161 // Width of the integration area
163 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
164 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
166 // Get pulse height from energy loss and generate feedback photons
170 // z-position of the wires relative to the RICH mother volume
171 // (2 mmm before CsI) old value: 6.076
172 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
173 //printf("AliRICHChamber feedback origin:%f",local[1]);
176 LocaltoGlobal(local,global);
181 // To calculate wire sag, the origin of y-position must be the middle of the photcathode
182 AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel();
185 newy = yhit - segmentation->GetPadPlaneLength()/2;
187 newy = yhit + segmentation->GetPadPlaneLength()/2;
190 qtot = fResponse->IntPH(eloss, newy);
191 nFp = fResponse->FeedBackPhotons(global,qtot);
192 } else if (res==kCerenkov) {
193 qtot = fResponse->IntPH(newy);
194 nFp = fResponse->FeedBackPhotons(global,qtot);
197 //printf("Feedbacks:%d\n",nFp);
202 Float_t qcheck=0, qp=0;
205 for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
206 fSegmentation->MorePads();
207 fSegmentation->NextPad())
209 qp= fResponse->IntXY(fSegmentation);
212 //printf("Qp:%f Qtot %f\n",qp,qtot);
217 // --- store signal information
218 newclust[0][nnew]=qp*qtot;
219 newclust[1][nnew]=fSegmentation->Ix();
220 newclust[2][nnew]=fSegmentation->Iy();
221 newclust[3][nnew]=fSegmentation->ISector();
223 //printf("Newcluster:%d\n",i);
226 //if (fSegmentation->ISector()==2)
227 //printf("Nnew:%d\n\n\n\n",nnew);
231 AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
233 // Assignment operator
239 void AliRICHChamber::GenerateTresholds()
242 // Generates random treshold charges for all pads
244 //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy());
246 Int_t nx = fSegmentation->Npx();
247 Int_t ny = fSegmentation->Npy();
251 //printf("Size:%d\n",size);
253 fTresh = new AliRICHTresholdMap(fSegmentation);
255 //printf("Generating tresholds...\n");
257 for(Int_t i=-nx/2;i<nx/2;i++)
259 for(Int_t j=-ny/2;j<ny/2;j++)
261 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
263 fTresh->SetHit(i,j,pedestal);
264 //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal);