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2e5f0f7b | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
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 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
733b4fa4 | 18 | Revision 1.9 2001/02/13 20:15:34 jbarbosa |
19 | Removed fNsec (number of cathodes - obsolete) related loops and calls. | |
20 | ||
f73582a8 | 21 | Revision 1.8 2000/12/18 17:45:43 jbarbosa |
22 | Cleaned up PadHits object. | |
23 | ||
176a9917 | 24 | Revision 1.7 2000/10/03 21:44:09 morsch |
25 | Use AliSegmentation and AliHit abstract base classes. | |
26 | ||
a2f7eaf6 | 27 | Revision 1.6 2000/10/02 15:44:37 jbarbosa |
28 | Fixed forward declarations. | |
29 | ||
488e98ba | 30 | Revision 1.5 2000/07/13 16:19:45 fca |
31 | Mainly coding conventions + some small bug fixes | |
32 | ||
ef42d733 | 33 | Revision 1.4 2000/06/30 16:48:58 dibari |
34 | New function GenerateTresholds() for pedestal simulation. | |
35 | ||
4faf338d | 36 | Revision 1.3 2000/06/12 15:17:58 jbarbosa |
37 | Cleaned up version. | |
38 | ||
237c933d | 39 | Revision 1.2 2000/05/18 13:45:57 jbarbosa |
40 | Fixed feedback photon origin coordinates | |
41 | ||
64cdfc12 | 42 | Revision 1.1 2000/04/19 12:57:20 morsch |
43 | Newly structured and updated version (JB, AM) | |
44 | ||
2e5f0f7b | 45 | */ |
46 | ||
47 | ||
48 | #include "AliRICHChamber.h" | |
237c933d | 49 | |
2e5f0f7b | 50 | #include <TLorentzVector.h> |
51 | #include <TParticle.h> | |
52 | #include <TRandom.h> | |
488e98ba | 53 | #include <TObjArray.h> |
54 | #include <TRotMatrix.h> | |
55 | #include <AliRICHTresholdMap.h> | |
a2f7eaf6 | 56 | #include <AliSegmentation.h> |
733b4fa4 | 57 | #include <AliRICHSegmentationV0.h> |
488e98ba | 58 | #include <AliRICHGeometry.h> |
59 | #include <AliRICHResponse.h> | |
2e5f0f7b | 60 | |
61 | ClassImp(AliRICHChamber) | |
62 | ||
63 | AliRICHChamber::AliRICHChamber() | |
64 | { | |
237c933d | 65 | |
66 | // | |
67 | // Chamber object constructor | |
68 | ||
2e5f0f7b | 69 | fSegmentation = 0; |
4faf338d | 70 | fResponse = 0; |
71 | fGeometry = 0; | |
72 | fTresh = 0; | |
73 | frMin = 0.1; | |
74 | frMax = 140; | |
ef42d733 | 75 | for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0; |
2e5f0f7b | 76 | } |
77 | ||
237c933d | 78 | AliRICHChamber::AliRICHChamber(const AliRICHChamber& Chamber) |
79 | { | |
80 | // Copy Constructor | |
81 | } | |
82 | ||
83 | ||
2e5f0f7b | 84 | AliRICHResponse* AliRICHChamber::GetResponseModel() |
85 | { | |
237c933d | 86 | // |
87 | // Get reference to response model | |
2e5f0f7b | 88 | return fResponse; |
89 | } | |
90 | ||
2e5f0f7b | 91 | void AliRICHChamber::ResponseModel(AliRICHResponse* thisResponse) |
92 | { | |
237c933d | 93 | // Configure response model |
2e5f0f7b | 94 | fResponse=thisResponse; |
95 | } | |
96 | ||
a2f7eaf6 | 97 | void AliRICHChamber::Init(Int_t id) |
2e5f0f7b | 98 | { |
237c933d | 99 | // Initialise chambers |
a2f7eaf6 | 100 | fSegmentation->Init(id); |
2e5f0f7b | 101 | } |
102 | ||
103 | void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3]) | |
104 | { | |
105 | ||
237c933d | 106 | // Local coordinates to global coordinates transformation |
107 | ||
2e5f0f7b | 108 | Double_t *fMatrix; |
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]; | |
116 | } | |
117 | ||
118 | void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3]) | |
119 | { | |
120 | ||
237c933d | 121 | // Global coordinates to local coordinates transformation |
122 | ||
2e5f0f7b | 123 | Double_t *fMatrixOrig; |
124 | TMatrix fMatrixCopy(3,3); | |
125 | fMatrixOrig = fChamberMatrix->GetMatrix(); | |
126 | for(Int_t i=0;i<3;i++) | |
127 | { | |
128 | for(Int_t j=0;j<3;j++) | |
129 | fMatrixCopy(j,i)=fMatrixOrig[j+3*i]; | |
130 | } | |
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]; | |
146 | } | |
147 | ||
148 | ||
149 | void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit, | |
176a9917 | 150 | Int_t& nnew,Float_t newclust[5][500],ResponseType res) |
2e5f0f7b | 151 | { |
152 | // | |
153 | // Generates pad hits (simulated cluster) | |
154 | // using the segmentation and the response model | |
155 | ||
156 | Float_t dx, dy; | |
157 | Float_t local[3]; | |
158 | //Float_t source[3]; | |
159 | Float_t global[3]; | |
160 | // | |
161 | // Width of the integration area | |
162 | // | |
163 | dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX()); | |
164 | dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY()); | |
165 | // | |
166 | // Get pulse height from energy loss and generate feedback photons | |
167 | Float_t qtot=0; | |
168 | ||
169 | local[0]=xhit; | |
170 | // z-position of the wires relative to the RICH mother volume | |
171 | // (2 mmm before CsI) old value: 6.076 | |
64cdfc12 | 172 | local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2; |
2e5f0f7b | 173 | //printf("AliRICHChamber feedback origin:%f",local[1]); |
174 | local[2]=yhit; | |
175 | ||
176 | LocaltoGlobal(local,global); | |
177 | ||
237c933d | 178 | Int_t nFp=0; |
2e5f0f7b | 179 | |
733b4fa4 | 180 | |
181 | // To calculate wire sag, the origin of y-position must be the middle of the photcathode | |
182 | AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel(); | |
183 | Float_t newy; | |
184 | if (yhit>0) | |
185 | newy = yhit - segmentation->GetPadPlaneLength()/2; | |
186 | else | |
187 | newy = yhit + segmentation->GetPadPlaneLength()/2; | |
188 | ||
237c933d | 189 | if (res==kMip) { |
733b4fa4 | 190 | qtot = fResponse->IntPH(eloss, newy); |
237c933d | 191 | nFp = fResponse->FeedBackPhotons(global,qtot); |
192 | } else if (res==kCerenkov) { | |
733b4fa4 | 193 | qtot = fResponse->IntPH(newy); |
237c933d | 194 | nFp = fResponse->FeedBackPhotons(global,qtot); |
2e5f0f7b | 195 | } |
196 | ||
237c933d | 197 | //printf("Feedbacks:%d\n",nFp); |
2e5f0f7b | 198 | |
199 | // | |
200 | // Loop Over Pads | |
201 | ||
202 | Float_t qcheck=0, qp=0; | |
203 | ||
204 | nnew=0; | |
f73582a8 | 205 | for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy); |
206 | fSegmentation->MorePads(); | |
207 | fSegmentation->NextPad()) | |
208 | { | |
209 | qp= fResponse->IntXY(fSegmentation); | |
210 | qp= TMath::Abs(qp); | |
211 | ||
733b4fa4 | 212 | //printf("Qp:%f Qtot %f\n",qp,qtot); |
f73582a8 | 213 | |
214 | if (qp > 1.e-4) { | |
215 | qcheck+=qp; | |
216 | // | |
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(); | |
222 | nnew++; | |
223 | //printf("Newcluster:%d\n",i); | |
224 | } | |
225 | } // Pad loop | |
2e5f0f7b | 226 | //if (fSegmentation->ISector()==2) |
227 | //printf("Nnew:%d\n\n\n\n",nnew); | |
228 | } | |
229 | ||
230 | ||
237c933d | 231 | AliRICHChamber& AliRICHChamber::operator=(const AliRICHChamber& rhs) |
232 | { | |
233 | // Assignment operator | |
234 | return *this; | |
235 | ||
236 | } | |
2e5f0f7b | 237 | |
238 | ||
4faf338d | 239 | void AliRICHChamber::GenerateTresholds() |
240 | { | |
241 | ||
242 | // Generates random treshold charges for all pads | |
243 | ||
244 | //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy()); | |
245 | ||
246 | Int_t nx = fSegmentation->Npx(); | |
247 | Int_t ny = fSegmentation->Npy(); | |
248 | ||
249 | //Int_t size=nx*ny; | |
250 | ||
251 | //printf("Size:%d\n",size); | |
252 | ||
253 | fTresh = new AliRICHTresholdMap(fSegmentation); | |
254 | ||
255 | //printf("Generating tresholds...\n"); | |
256 | ||
257 | for(Int_t i=-nx/2;i<nx/2;i++) | |
258 | { | |
259 | for(Int_t j=-ny/2;j<ny/2;j++) | |
260 | { | |
261 | Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10)); | |
262 | //Int_t pedestal =0; | |
263 | fTresh->SetHit(i,j,pedestal); | |
264 | //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal); | |
265 | } | |
266 | } | |
267 | ||
268 | } |