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 1.11 2001/05/10 12:35:39 jbarbosa
21 Revision 1.10 2001/02/23 17:21:17 jbarbosa
22 Re-definition of IntPH() to accomodate for wire sag effect.
24 Revision 1.9 2001/02/13 20:15:34 jbarbosa
25 Removed fNsec (number of cathodes - obsolete) related loops and calls.
27 Revision 1.8 2000/12/18 17:45:43 jbarbosa
28 Cleaned up PadHits object.
30 Revision 1.7 2000/10/03 21:44:09 morsch
31 Use AliSegmentation and AliHit abstract base classes.
33 Revision 1.6 2000/10/02 15:44:37 jbarbosa
34 Fixed forward declarations.
36 Revision 1.5 2000/07/13 16:19:45 fca
37 Mainly coding conventions + some small bug fixes
39 Revision 1.4 2000/06/30 16:48:58 dibari
40 New function GenerateTresholds() for pedestal simulation.
42 Revision 1.3 2000/06/12 15:17:58 jbarbosa
45 Revision 1.2 2000/05/18 13:45:57 jbarbosa
46 Fixed feedback photon origin coordinates
48 Revision 1.1 2000/04/19 12:57:20 morsch
49 Newly structured and updated version (JB, AM)
54 #include "AliRICHChamber.h"
56 #include <TLorentzVector.h>
57 #include <TParticle.h>
59 #include <TObjArray.h>
60 #include <TRotMatrix.h>
61 #include <AliRICHTresholdMap.h>
62 #include <AliSegmentation.h>
63 #include <AliRICHSegmentationV0.h>
64 #include <AliRICHGeometry.h>
65 #include <AliRICHResponse.h>
67 ClassImp(AliRICHChamber)
69 AliRICHChamber::AliRICHChamber()
73 // Chamber object constructor
83 for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0;
86 AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
92 AliRICHResponse* AliRICHChamber::GetResponseModel()
95 // Get reference to response model
99 void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
101 // Configure response model
102 fResponse=thisResponse;
105 void AliRICHChamber::Init(Int_t id)
107 // Initialise chambers
108 fSegmentation->Init(id);
111 void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
114 // Local coordinates to global coordinates transformation
117 fMatrix = fChamberMatrix->GetMatrix();
118 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
119 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
120 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
121 Globalpos[0]+=fChamberTrans[0];
122 Globalpos[1]+=fChamberTrans[1];
123 Globalpos[2]+=fChamberTrans[2];
126 void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
129 // Global coordinates to local coordinates transformation
131 Double_t *fMatrixOrig;
132 TMatrix fMatrixCopy(3,3);
133 fMatrixOrig = fChamberMatrix->GetMatrix();
134 for(Int_t i=0;i<3;i++)
136 for(Int_t j=0;j<3;j++)
137 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
139 fMatrixCopy.Invert();
140 //Int_t elements=fMatrixCopy.GetNoElements();
141 //printf("Elements:%d\n",elements);
142 //fMatrixOrig= (Double_t*) fMatrixCopy;
143 Localpos[0] = pos[0] - fChamberTrans[0];
144 Localpos[1] = pos[1] - fChamberTrans[1];
145 Localpos[2] = pos[2] - fChamberTrans[2];
146 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
147 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
148 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
149 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
150 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
151 //Localpos[0]-=fChamberTrans[0];
152 //Localpos[1]-=fChamberTrans[1];
153 //Localpos[2]-=fChamberTrans[2];
157 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
158 Int_t& nnew,Float_t newclust[5][500],ResponseType res)
161 // Generates pad hits (simulated cluster)
162 // using the segmentation and the response model
169 // Width of the integration area
171 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
172 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
174 // Get pulse height from energy loss and generate feedback photons
178 // z-position of the wires relative to the RICH mother volume
179 // (2 mmm before CsI) old value: 6.076
180 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
181 //printf("AliRICHChamber feedback origin:%f",local[1]);
184 LocaltoGlobal(local,global);
189 // To calculate wire sag, the origin of y-position must be the middle of the photcathode
190 AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel();
193 newy = yhit - segmentation->GetPadPlaneLength()/2;
195 newy = yhit + segmentation->GetPadPlaneLength()/2;
198 qtot = fResponse->IntPH(eloss, newy);
199 nFp = fResponse->FeedBackPhotons(global,qtot);
200 //printf("feedbacks:%d\n",nFp);
201 } else if (res==kCerenkov) {
202 qtot = fResponse->IntPH(newy);
203 nFp = fResponse->FeedBackPhotons(global,qtot);
204 //printf("feedbacks:%d\n",nFp);
207 //printf("Feedbacks:%d\n",nFp);
212 Float_t qcheck=0, qp=0;
215 for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
216 fSegmentation->MorePads();
217 fSegmentation->NextPad())
219 qp= fResponse->IntXY(fSegmentation);
222 //printf("Qp:%f Qtot %f\n",qp,qtot);
227 // --- store signal information
228 newclust[0][nnew]=qp*qtot;
229 newclust[1][nnew]=fSegmentation->Ix();
230 newclust[2][nnew]=fSegmentation->Iy();
231 newclust[3][nnew]=fSegmentation->ISector();
233 //printf("Newcluster:%d\n",i);
236 //if (fSegmentation->ISector()==2)
237 //printf("Nnew:%d\n\n\n\n",nnew);
241 AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
243 // Assignment operator
249 void AliRICHChamber::GenerateTresholds()
252 // Generates random treshold charges for all pads
254 //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy());
256 Int_t nx = fSegmentation->Npx();
257 Int_t ny = fSegmentation->Npy();
261 //printf("Size:%d\n",size);
263 fTresh = new AliRICHTresholdMap(fSegmentation);
265 //printf("Generating tresholds...\n");
267 for(Int_t i=-nx/2;i<nx/2;i++)
269 for(Int_t j=-ny/2;j<ny/2;j++)
271 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
273 fTresh->SetHit(i,j,pedestal);
274 //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal);