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a9e2aefa | 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 | **************************************************************************/ | |
2682e810 | 15 | |
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
30178c30 | 18 | // --- ROOT includes --- |
19 | #include <TRandom.h> | |
20 | #include <TMath.h> | |
a713db22 | 21 | #include "AliRun.h" |
22 | ||
30178c30 | 23 | |
681d067b | 24 | // --- MUON includes --- |
a713db22 | 25 | #include "AliMUON.h" |
a9e2aefa | 26 | #include "AliMUONChamber.h" |
e118b27e | 27 | #include "AliMUONGeometryModule.h" |
a713db22 | 28 | #include "AliMUONHit.h" |
8c343c7c | 29 | #include "AliLog.h" |
a9e2aefa | 30 | |
a9e2aefa | 31 | ClassImp(AliMUONChamber) |
32 | ||
30178c30 | 33 | AliMUONChamber::AliMUONChamber() |
34 | : TObject(), | |
35 | fId(0), | |
36 | fdGas(0.), | |
37 | fdAlu(0.), | |
38 | fZ(0.), | |
39 | fnsec(1), | |
40 | frMin(0.), | |
41 | frMax(0.), | |
42 | fCurrentCorrel(1), // to avoid mistakes if ChargeCorrelInit is not called | |
a713db22 | 43 | fSegmentation2(0), |
30178c30 | 44 | fResponse(0), |
a713db22 | 45 | fGeometry(0), |
46 | fMUON(0) | |
d81db581 | 47 | { |
48 | // Default constructor | |
d81db581 | 49 | } |
50 | ||
a713db22 | 51 | //_______________________________________________________ |
30178c30 | 52 | AliMUONChamber::AliMUONChamber(Int_t id) |
53 | : TObject(), | |
54 | fId(id), | |
55 | fdGas(0.), | |
56 | fdAlu(0.), | |
57 | fZ(0.), | |
58 | fnsec(1), | |
59 | frMin(0.), | |
60 | frMax(0.), | |
61 | fCurrentCorrel(1), // to avoid mistakes if ChargeCorrelInit is not called | |
a713db22 | 62 | fSegmentation2(0), |
30178c30 | 63 | fResponse(0), |
a713db22 | 64 | fGeometry(0), |
65 | fMUON(0) | |
a9e2aefa | 66 | { |
a713db22 | 67 | |
68 | // muon | |
69 | fMUON = (AliMUON*)gAlice->GetModule("MUON"); | |
70 | if (!fMUON) { | |
71 | AliFatal("MUON detector not defined."); | |
72 | return; | |
73 | } | |
002920d1 | 74 | |
a713db22 | 75 | // new segmentation |
76 | fSegmentation2 = new TObjArray(2); | |
77 | fSegmentation2->AddAt(0,0); | |
78 | fSegmentation2->AddAt(0,1); | |
79 | ||
e118b27e | 80 | fGeometry = new AliMUONGeometryModule(fId); |
a713db22 | 81 | |
30178c30 | 82 | } |
83 | ||
a713db22 | 84 | //_______________________________________________________ |
30178c30 | 85 | AliMUONChamber::AliMUONChamber(const AliMUONChamber& rChamber) |
86 | : TObject(rChamber) | |
87 | { | |
a713db22 | 88 | // Protected copy constructor |
30178c30 | 89 | |
8c343c7c | 90 | AliFatal("Not implemented."); |
a713db22 | 91 | // Dummy copy constructor |
a9e2aefa | 92 | } |
93 | ||
a713db22 | 94 | //_______________________________________________________ |
a9e2aefa | 95 | AliMUONChamber::~AliMUONChamber() |
96 | { | |
a713db22 | 97 | // Destructor |
002920d1 | 98 | |
99 | if (fSegmentation2) { | |
100 | fSegmentation2->Delete(); | |
101 | delete fSegmentation2; | |
c2c0190f | 102 | } |
002920d1 | 103 | |
c6df4ef2 | 104 | delete fGeometry; |
a9e2aefa | 105 | } |
106 | ||
a713db22 | 107 | //_______________________________________________________ |
30178c30 | 108 | AliMUONChamber & AliMUONChamber::operator =(const AliMUONChamber& rhs) |
390151b8 | 109 | { |
a713db22 | 110 | // Protected assignement operator |
a9e2aefa | 111 | |
30178c30 | 112 | if (this == &rhs) return *this; |
113 | ||
8c343c7c | 114 | AliFatal("Not implemented."); |
30178c30 | 115 | |
116 | return *this; | |
117 | } | |
a9e2aefa | 118 | |
a713db22 | 119 | //_______________________________________________________ |
d1cd2474 | 120 | Bool_t AliMUONChamber::IsSensId(Int_t volId) const |
121 | { | |
a713db22 | 122 | // Returns true if the volume specified by volId is in the list |
123 | // of sesitive volumes for this chamber | |
d1cd2474 | 124 | |
125 | return fGeometry->IsSensitiveVolume(volId); | |
126 | } | |
127 | ||
a9e2aefa | 128 | |
a713db22 | 129 | //_____________________________________________________ |
681d067b | 130 | void AliMUONChamber::ChargeCorrelationInit() { |
a713db22 | 131 | // Initialisation of charge correlation for current hit |
132 | // the value is stored, and then used by Disintegration | |
133 | if (fnsec==1) | |
681d067b | 134 | fCurrentCorrel =1; |
a713db22 | 135 | else |
681d067b | 136 | // exponential is here to avoid eventual problems in 0 |
16d57990 | 137 | // factor 2 because chargecorrel is q1/q2 and not q1/qtrue |
138 | fCurrentCorrel = TMath::Exp(gRandom->Gaus(0,fResponse->ChargeCorrel()/2)); | |
681d067b | 139 | } |
140 | ||
a713db22 | 141 | //_______________________________________________________ |
142 | void AliMUONChamber::InitGeo(Float_t /*zpos*/) | |
143 | { | |
144 | // sensitive gas gap | |
145 | fdGas= 0.5; | |
146 | // 3% radiation length of aluminum (X0=8.9 cm) | |
147 | fdAlu= 3.0/100*8.9; | |
148 | } | |
149 | //_______________________________________________________ | |
150 | // | |
151 | // NEW SEGMENTATION | |
152 | //_______________________________________________________ | |
153 | void AliMUONChamber::Init(Int_t flag) | |
154 | { | |
155 | // Initalisation .. | |
156 | // | |
157 | // ... for chamber segmentation | |
a9e2aefa | 158 | |
a713db22 | 159 | if (!flag) AliFatal("wrong segmentation type."); |
a9e2aefa | 160 | |
a713db22 | 161 | |
162 | if (fSegmentation2->At(0)) | |
163 | ((AliMUONGeometrySegmentation*) fSegmentation2->At(0))->Init(fId); | |
164 | ||
165 | if (fnsec==2) { | |
166 | if (fSegmentation2->At(1)) | |
167 | ((AliMUONGeometrySegmentation*) fSegmentation2->At(1))->Init(fId); | |
168 | } | |
169 | } | |
170 | ||
171 | //_________________________________________________________________ | |
172 | Int_t AliMUONChamber::SigGenCond(AliMUONHit *hit) | |
173 | { | |
174 | // Ask segmentation if signal should be generated | |
175 | ||
176 | Float_t x = hit->X(); | |
177 | Float_t y = hit->Y(); | |
178 | Float_t z = hit->Z(); | |
179 | Int_t id = hit->DetElemId(); | |
180 | ||
181 | if (fnsec==1) { | |
182 | return ((AliMUONGeometrySegmentation*)fSegmentation2->At(0))->SigGenCond(id, x, y, z); | |
183 | } else { | |
184 | return (((AliMUONGeometrySegmentation*) fSegmentation2->At(0)) | |
185 | ->SigGenCond(id, x, y, z)) || | |
186 | (((AliMUONGeometrySegmentation*) fSegmentation2->At(1)) | |
187 | ->SigGenCond(id, x, y, z)) ; | |
188 | } | |
189 | } | |
190 | ||
191 | //_________________________________________________________________ | |
192 | void AliMUONChamber::SigGenInit(AliMUONHit *hit) | |
a9e2aefa | 193 | { |
a713db22 | 194 | // |
195 | // Initialisation of segmentation for hit | |
196 | // | |
197 | Float_t x = hit->X(); | |
198 | Float_t y = hit->Y(); | |
199 | Float_t z = hit->Z(); | |
200 | Int_t id = hit->DetElemId(); | |
201 | ||
202 | if (fnsec==1) { | |
203 | ((AliMUONGeometrySegmentation*) fSegmentation2->At(0))->SigGenInit(id, x, y, z) ; | |
204 | } else { | |
205 | ((AliMUONGeometrySegmentation*) fSegmentation2->At(0))->SigGenInit(id, x, y, z) ; | |
206 | ((AliMUONGeometrySegmentation*) fSegmentation2->At(1))->SigGenInit(id, x, y, z) ; | |
207 | } | |
a9e2aefa | 208 | } |
209 | ||
a713db22 | 210 | //_______________________________________________________ |
211 | void AliMUONChamber::DisIntegration(AliMUONHit *hit, | |
212 | Int_t& nnew,Float_t newclust[6][500]) | |
213 | { | |
214 | // | |
215 | // Generates pad hits (simulated cluster) | |
216 | // using the segmentation and the response model | |
217 | Float_t dx, dy; | |
218 | ||
219 | Float_t xhit = hit->X(); | |
220 | Float_t yhit = hit->Y(); | |
221 | Float_t zhit = hit->Z(); | |
222 | Int_t id = hit->DetElemId(); | |
223 | Float_t eloss = hit->Eloss(); | |
a9e2aefa | 224 | |
a713db22 | 225 | // |
226 | // Width of the integration area | |
227 | // | |
228 | dx=fResponse->SigmaIntegration()*fResponse->ChargeSpreadX(); | |
229 | dy=fResponse->SigmaIntegration()*fResponse->ChargeSpreadY(); | |
230 | // | |
231 | // Get pulse height from energy loss | |
232 | Float_t qtot = fResponse->IntPH(eloss); | |
233 | // | |
234 | // Loop Over Pads | |
235 | ||
236 | Float_t qp; | |
237 | nnew=0; | |
238 | ||
239 | // Cathode plane loop | |
240 | for (Int_t i=1; i<=fnsec; i++) { | |
241 | Float_t qcath = qtot * (i==1? fCurrentCorrel : 1/fCurrentCorrel); | |
242 | ||
243 | AliMUONGeometrySegmentation* segmentation= | |
244 | (AliMUONGeometrySegmentation*) fSegmentation2->At(i-1); | |
245 | ||
246 | for (segmentation->FirstPad(id, xhit, yhit, zhit, dx, dy); | |
247 | segmentation->MorePads(id); | |
248 | segmentation->NextPad(id)) | |
249 | { | |
250 | qp=fResponse->IntXY(id, segmentation); | |
251 | qp=TMath::Abs(qp); | |
252 | // | |
253 | // | |
254 | if (qp > 1.e-4) | |
255 | { | |
256 | if (nnew >= 500) // Perform a bounds check on nnew since it is assumed | |
257 | // newclust only contains 500 elements. | |
258 | { | |
259 | AliError("Limit of 500 pad responses reached."); | |
260 | return; | |
261 | }; | |
262 | // | |
263 | // --- store signal information | |
264 | newclust[0][nnew]=qcath; // total charge | |
265 | newclust[1][nnew]=segmentation->Ix(); // ix-position of pad | |
266 | newclust[2][nnew]=segmentation->Iy(); // iy-position of pad | |
267 | newclust[3][nnew]=qp * qcath; // charge on pad | |
268 | newclust[4][nnew]=segmentation->ISector(); // sector id | |
269 | newclust[5][nnew]=(Float_t) i; // counter | |
270 | nnew++; | |
271 | ||
272 | } | |
273 | } // Pad loop | |
274 | } // Cathode plane loop | |
275 | } |