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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 | $Log$ | |
18 | Revision 1.13 2001/11/06 18:29:36 dibari | |
19 | minor correcttion of Taligent rules | |
20 | ||
21 | Revision 1.12 2001/09/07 08:38:10 hristov | |
22 | Pointers initialised to 0 in the default constructors | |
23 | ||
24 | Revision 1.11 2001/05/10 12:35:39 jbarbosa | |
25 | Update. | |
26 | ||
27 | Revision 1.10 2001/02/23 17:21:17 jbarbosa | |
28 | Re-definition of IntPH() to accomodate for wire sag effect. | |
29 | ||
30 | Revision 1.9 2001/02/13 20:15:34 jbarbosa | |
31 | Removed fNsec (number of cathodes - obsolete) related loops and calls. | |
32 | ||
33 | Revision 1.8 2000/12/18 17:45:43 jbarbosa | |
34 | Cleaned up PadHits object. | |
35 | ||
36 | Revision 1.7 2000/10/03 21:44:09 morsch | |
37 | Use AliSegmentation and AliHit abstract base classes. | |
38 | ||
39 | Revision 1.6 2000/10/02 15:44:37 jbarbosa | |
40 | Fixed forward declarations. | |
41 | ||
42 | Revision 1.5 2000/07/13 16:19:45 fca | |
43 | Mainly coding conventions + some small bug fixes | |
44 | ||
45 | Revision 1.4 2000/06/30 16:48:58 dibari | |
46 | New function GenerateTresholds() for pedestal simulation. | |
47 | ||
48 | Revision 1.3 2000/06/12 15:17:58 jbarbosa | |
49 | Cleaned up version. | |
50 | ||
51 | Revision 1.2 2000/05/18 13:45:57 jbarbosa | |
52 | Fixed feedback photon origin coordinates | |
53 | ||
54 | Revision 1.1 2000/04/19 12:57:20 morsch | |
55 | Newly structured and updated version (JB, AM) | |
56 | ||
57 | */ | |
58 | ||
59 | ||
60 | #include "AliRICHChamber.h" | |
61 | ||
62 | #include <TLorentzVector.h> | |
63 | #include <TParticle.h> | |
64 | #include <TRandom.h> | |
65 | #include <TObjArray.h> | |
66 | #include <TRotMatrix.h> | |
67 | #include <AliRICHTresholdMap.h> | |
68 | #include <AliSegmentation.h> | |
69 | #include <AliRICHSegmentationV0.h> | |
70 | #include <AliRICHGeometry.h> | |
71 | #include <AliRICHResponse.h> | |
72 | ||
73 | ClassImp(AliRICHChamber) | |
74 | ||
75 | AliRICHChamber::AliRICHChamber() | |
76 | { | |
77 | // default ctor | |
78 | ||
79 | fpRotMatrix = 0; | |
80 | fSegmentation = 0; | |
81 | fResponse = 0; | |
82 | fGeometry = 0; | |
83 | fReconstruction = 0; | |
84 | fTresh = 0; | |
85 | frMin = 0.1; | |
86 | frMax = 140; | |
87 | for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0; | |
88 | } | |
89 | ||
90 | void AliRICHChamber::LocaltoGlobal(Float_t pos[3],Float_t Globalpos[3]) | |
91 | { | |
92 | // Local coordinates to global coordinates transformation | |
93 | ||
94 | Double_t *pMatrix; | |
95 | pMatrix = fpRotMatrix->GetMatrix(); | |
96 | Globalpos[0]=pos[0]*pMatrix[0]+pos[1]*pMatrix[3]+pos[2]*pMatrix[6]; | |
97 | Globalpos[1]=pos[0]*pMatrix[1]+pos[1]*pMatrix[4]+pos[2]*pMatrix[7]; | |
98 | Globalpos[2]=pos[0]*pMatrix[2]+pos[1]*pMatrix[5]+pos[2]*pMatrix[8]; | |
99 | Globalpos[0]+=fX; | |
100 | Globalpos[1]+=fY; | |
101 | Globalpos[2]+=fZ; | |
102 | } | |
103 | ||
104 | void AliRICHChamber::GlobaltoLocal(Float_t pos[3],Float_t Localpos[3]) | |
105 | { | |
106 | // | |
107 | // Global coordinates to local coordinates transformation | |
108 | // | |
109 | TMatrix matrixCopy(3,3); | |
110 | Double_t *pMatrixOrig = fpRotMatrix->GetMatrix(); | |
111 | for(Int_t i=0;i<3;i++) | |
112 | { | |
113 | for(Int_t j=0;j<3;j++) | |
114 | matrixCopy(j,i)=pMatrixOrig[j+3*i]; | |
115 | } | |
116 | matrixCopy.Invert(); | |
117 | Localpos[0] = pos[0] - fX; | |
118 | Localpos[1] = pos[1] - fY; | |
119 | Localpos[2] = pos[2] - fZ; | |
120 | Localpos[0]=Localpos[0]*matrixCopy(0,0)+Localpos[1]*matrixCopy(0,1)+Localpos[2]*matrixCopy(0,2); | |
121 | Localpos[1]=Localpos[0]*matrixCopy(1,0)+Localpos[1]*matrixCopy(1,1)+Localpos[2]*matrixCopy(1,2); | |
122 | Localpos[2]=Localpos[0]*matrixCopy(2,0)+Localpos[1]*matrixCopy(2,1)+Localpos[2]*matrixCopy(2,2); | |
123 | } | |
124 | ||
125 | void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit, | |
126 | Int_t& nnew,Float_t newclust[5][500],ResponseType res) | |
127 | { | |
128 | // | |
129 | // Generates pad hits (simulated cluster) | |
130 | // using the segmentation and the response model | |
131 | ||
132 | Float_t dx, dy; | |
133 | Float_t local[3]; | |
134 | //Float_t source[3]; | |
135 | Float_t global[3]; | |
136 | // | |
137 | // Width of the integration area | |
138 | // | |
139 | dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX()); | |
140 | dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY()); | |
141 | // | |
142 | // Get pulse height from energy loss and generate feedback photons | |
143 | Float_t qtot=0; | |
144 | ||
145 | local[0]=xhit; | |
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]); | |
150 | local[2]=yhit; | |
151 | ||
152 | LocaltoGlobal(local,global); | |
153 | ||
154 | Int_t nFp=0; | |
155 | ||
156 | ||
157 | // To calculate wire sag, the origin of y-position must be the middle of the photcathode | |
158 | AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel(); | |
159 | Float_t newy; | |
160 | if (yhit>0) | |
161 | newy = yhit - segmentation->GetPadPlaneLength()/2; | |
162 | else | |
163 | newy = yhit + segmentation->GetPadPlaneLength()/2; | |
164 | ||
165 | if (res==kMip) { | |
166 | qtot = fResponse->IntPH(eloss, newy); | |
167 | nFp = fResponse->FeedBackPhotons(global,qtot); | |
168 | //printf("feedbacks:%d\n",nFp); | |
169 | } else if (res==kCerenkov) { | |
170 | qtot = fResponse->IntPH(newy); | |
171 | nFp = fResponse->FeedBackPhotons(global,qtot); | |
172 | //printf("feedbacks:%d\n",nFp); | |
173 | } | |
174 | ||
175 | //printf("Feedbacks:%d\n",nFp); | |
176 | ||
177 | // | |
178 | // Loop Over Pads | |
179 | ||
180 | Float_t qcheck=0, qp=0; | |
181 | ||
182 | nnew=0; | |
183 | for (fSegmentation->FirstPad(xhit, yhit, 0, dx, dy); | |
184 | fSegmentation->MorePads(); | |
185 | fSegmentation->NextPad()) | |
186 | { | |
187 | qp= fResponse->IntXY(fSegmentation); | |
188 | qp= TMath::Abs(qp); | |
189 | ||
190 | //printf("Qp:%f Qtot %f\n",qp,qtot); | |
191 | ||
192 | if (qp > 1.e-4) { | |
193 | qcheck+=qp; | |
194 | // | |
195 | // --- store signal information | |
196 | newclust[0][nnew]=qp*qtot; | |
197 | newclust[1][nnew]=fSegmentation->Ix(); | |
198 | newclust[2][nnew]=fSegmentation->Iy(); | |
199 | newclust[3][nnew]=fSegmentation->ISector(); | |
200 | nnew++; | |
201 | //printf("Newcluster:%d\n",i); | |
202 | } | |
203 | } // Pad loop | |
204 | //if (fSegmentation->ISector()==2) | |
205 | //printf("Nnew:%d\n\n\n\n",nnew); | |
206 | } | |
207 | ||
208 | ||
209 | ||
210 | ||
211 | void AliRICHChamber::GenerateTresholds() | |
212 | { | |
213 | ||
214 | // Generates random treshold charges for all pads | |
215 | ||
216 | //printf("Pads : %dx%d\n",fSegmentation->Npx(),fSegmentation->Npy()); | |
217 | ||
218 | Int_t nx = fSegmentation->Npx(); | |
219 | Int_t ny = fSegmentation->Npy(); | |
220 | ||
221 | //Int_t size=nx*ny; | |
222 | ||
223 | //printf("Size:%d\n",size); | |
224 | ||
225 | fTresh = new AliRICHTresholdMap(fSegmentation); | |
226 | ||
227 | //printf("Generating tresholds...\n"); | |
228 | ||
229 | for(Int_t i=-nx/2;i<nx/2;i++) | |
230 | { | |
231 | for(Int_t j=-ny/2;j<ny/2;j++) | |
232 | { | |
233 | Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10)); | |
234 | //Int_t pedestal =0; | |
235 | fTresh->SetHit(i,j,pedestal); | |
236 | //printf("Pad %d %d has pedestal %d.\n",i,j,pedestal); | |
237 | } | |
238 | } | |
239 | ||
240 | } |