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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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 1.10 2001/02/23 17:21:17 jbarbosa
19 Re-definition of IntPH() to accomodate for wire sag effect.
21 Revision 1.9 2001/02/13 20:15:34 jbarbosa
22 Removed fNsec (number of cathodes - obsolete) related loops and calls.
24 Revision 1.8 2000/12/18 17:45:43 jbarbosa
25 Cleaned up PadHits object.
27 Revision 1.7 2000/10/03 21:44:09 morsch
28 Use AliSegmentation and AliHit abstract base classes.
30 Revision 1.6 2000/10/02 15:44:37 jbarbosa
31 Fixed forward declarations.
33 Revision 1.5 2000/07/13 16:19:45 fca
34 Mainly coding conventions + some small bug fixes
36 Revision 1.4 2000/06/30 16:48:58 dibari
37 New function GenerateTresholds() for pedestal simulation.
39 Revision 1.3 2000/06/12 15:17:58 jbarbosa
42 Revision 1.2 2000/05/18 13:45:57 jbarbosa
43 Fixed feedback photon origin coordinates
45 Revision 1.1 2000/04/19 12:57:20 morsch
46 Newly structured and updated version (JB, AM)
51 #include "AliRICHChamber.h"
53 #include <TLorentzVector.h>
54 #include <TParticle.h>
56 #include <TObjArray.h>
57 #include <TRotMatrix.h>
58 #include <AliRICHTresholdMap.h>
59 #include <AliSegmentation.h>
60 #include <AliRICHSegmentationV0.h>
61 #include <AliRICHGeometry.h>
62 #include <AliRICHResponse.h>
64 ClassImp(AliRICHChamber)
66 AliRICHChamber::AliRICHChamber()
70 // Chamber object constructor
78 for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0;
81 AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber)
87 AliRICHResponse* AliRICHChamber::GetResponseModel()
90 // Get reference to response model
94 void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse)
96 // Configure response model
97 fResponse=thisResponse;
100 void AliRICHChamber::Init(Int_t id)
102 // Initialise chambers
103 fSegmentation->Init(id);
106 void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3])
109 // Local coordinates to global coordinates transformation
112 fMatrix = fChamberMatrix->GetMatrix();
113 Globalpos[0]=pos[0]*fMatrix[0]+pos[1]*fMatrix[3]+pos[2]*fMatrix[6];
114 Globalpos[1]=pos[0]*fMatrix[1]+pos[1]*fMatrix[4]+pos[2]*fMatrix[7];
115 Globalpos[2]=pos[0]*fMatrix[2]+pos[1]*fMatrix[5]+pos[2]*fMatrix[8];
116 Globalpos[0]+=fChamberTrans[0];
117 Globalpos[1]+=fChamberTrans[1];
118 Globalpos[2]+=fChamberTrans[2];
121 void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3])
124 // Global coordinates to local coordinates transformation
126 Double_t *fMatrixOrig;
127 TMatrix fMatrixCopy(3,3);
128 fMatrixOrig = fChamberMatrix->GetMatrix();
129 for(Int_t i=0;i<3;i++)
131 for(Int_t j=0;j<3;j++)
132 fMatrixCopy(j,i)=fMatrixOrig[j+3*i];
134 fMatrixCopy.Invert();
135 //Int_t elements=fMatrixCopy.GetNoElements();
136 //printf("Elements:%d\n",elements);
137 //fMatrixOrig= (Double_t*) fMatrixCopy;
138 Localpos[0] = pos[0] - fChamberTrans[0];
139 Localpos[1] = pos[1] - fChamberTrans[1];
140 Localpos[2] = pos[2] - fChamberTrans[2];
141 //printf("r1:%f, r2:%f, r3:%f\n",Localpos[0],Localpos[1],Localpos[2]);
142 //printf("t1:%f t2:%f t3:%f\n",fChamberTrans[0],fChamberTrans[1],fChamberTrans[2]);
143 Localpos[0]=Localpos[0]*fMatrixCopy(0,0)+Localpos[1]*fMatrixCopy(0,1)+Localpos[2]*fMatrixCopy(0,2);
144 Localpos[1]=Localpos[0]*fMatrixCopy(1,0)+Localpos[1]*fMatrixCopy(1,1)+Localpos[2]*fMatrixCopy(1,2);
145 Localpos[2]=Localpos[0]*fMatrixCopy(2,0)+Localpos[1]*fMatrixCopy(2,1)+Localpos[2]*fMatrixCopy(2,2);
146 //Localpos[0]-=fChamberTrans[0];
147 //Localpos[1]-=fChamberTrans[1];
148 //Localpos[2]-=fChamberTrans[2];
152 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
153 Int_t& nnew,Float_t newclust[5][500],ResponseType res)
156 // Generates pad hits (simulated cluster)
157 // using the segmentation and the response model
164 // Width of the integration area
166 dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
167 dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
169 // Get pulse height from energy loss and generate feedback photons
173 // z-position of the wires relative to the RICH mother volume
174 // (2 mmm before CsI) old value: 6.076
175 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
176 //printf("AliRICHChamber feedback origin:%f",local[1]);
179 LocaltoGlobal(local,global);
184 // To calculate wire sag, the origin of y-position must be the middle of the photcathode
185 AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel();
188 newy = yhit - segmentation->GetPadPlaneLength()/2;
190 newy = yhit + segmentation->GetPadPlaneLength()/2;
193 qtot = fResponse->IntPH(eloss, newy);
194 nFp = fResponse->FeedBackPhotons(global,qtot);
195 //printf("feedbacks:%d\n",nFp);
196 } else if (res==kCerenkov) {
197 qtot = fResponse->IntPH(newy);
198 nFp = fResponse->FeedBackPhotons(global,qtot);
199 //printf("feedbacks:%d\n",nFp);
202 //printf("Feedbacks:%d\n",nFp);
207 Float_t qcheck=0, qp=0;
210 for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
211 fSegmentation->MorePads();
212 fSegmentation->NextPad())
214 qp= fResponse->IntXY(fSegmentation);
217 //printf("Qp:%f Qtot %f\n",qp,qtot);
222 // --- store signal information
223 newclust[0][nnew]=qp*qtot;
224 newclust[1][nnew]=fSegmentation->Ix();
225 newclust[2][nnew]=fSegmentation->Iy();
226 newclust[3][nnew]=fSegmentation->ISector();
228 //printf("Newcluster:%d\n",i);
231 //if (fSegmentation->ISector()==2)
232 //printf("Nnew:%d\n\n\n\n",nnew);
236 AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs)
238 // Assignment operator
244 void AliRICHChamber::GenerateTresholds()
247 // Generates random treshold charges for all pads
249 //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy());
251 Int_t nx = fSegmentation->Npx();
252 Int_t ny = fSegmentation->Npy();
256 //printf("Size:%d\n",size);
258 fTresh = new AliRICHTresholdMap(fSegmentation);
260 //printf("Generating tresholds...\n");
262 for(Int_t i=-nx/2;i<nx/2;i++)
264 for(Int_t j=-ny/2;j<ny/2;j++)
266 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
268 fTresh->SetHit(i,j,pedestal);
269 //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal);