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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 | /* $Id$ */ |
17 | |
18 | //____________________________________________________________________ |
19 | // |
20 | // Forward Multiplicity Detector based on Silicon wafers. This class |
21 | // contains the base procedures for the Forward Multiplicity detector |
22 | // Detector consists of 3 sub-detectors FMD1, FMD2, and FMD3, each of |
23 | // which has 1 or 2 rings of silicon sensors. |
24 | // |
25 | // This is the base class for all FMD manager classes. |
26 | // |
27 | // The actual code is done by various separate classes. Below is |
28 | // diagram showing the relationship between the various FMD classes |
29 | // that handles the simulation |
30 | // |
31 | // +--------+ 1 +-----------------+ |
32 | // | AliFMD |<>-----| AliFMDSimulator | |
33 | // +--------+ +-----------------+ |
34 | // ^ |
35 | // | |
36 | // +-------------+-------------+ |
37 | // | | |
38 | // +--------------------+ +-------------------+ |
39 | // | AliFMDGeoSimulator | | AliFMDG3Simulator | |
4ac75127 |
40 | // +--------------------+ +-------------------+ |
41 | // ^ |
42 | // | |
43 | // +----------------------+ |
44 | // | AliFMDG3OldSimulator | |
45 | // +----------------------+ |
1a1fdef7 |
46 | // |
1a1fdef7 |
47 | // * AliFMD |
48 | // This defines the interface for the various parts of AliROOT that |
49 | // uses the FMD, like AliFMDSimulator, AliFMDDigitizer, |
50 | // AliFMDReconstructor, and so on. |
51 | // |
52 | // * AliFMDSimulator |
53 | // This is the base class for the FMD simulation tasks. The |
54 | // simulator tasks are responsible to implment the geoemtry, and |
55 | // process hits. |
56 | // |
57 | // * AliFMDGeoSimulator |
58 | // This is a concrete implementation of the AliFMDSimulator that |
59 | // uses the TGeo classes directly only. This defines the active |
60 | // volume as an ONLY XTRU shape with a divided MANY TUBS shape |
61 | // inside to implement the particular shape of the silicon |
62 | // sensors. |
63 | // |
64 | // * AliFMDG3Simulator |
65 | // This is a concrete implementation of the AliFMDSimulator that |
66 | // uses the TVirtualMC interface with GEANT 3.21-like messages. |
67 | // This implements the active volume as a divided TUBS shape. Hits |
68 | // in the corners should be cut away at run time (but currently |
69 | // isn't). |
70 | // |
4ac75127 |
71 | // * AliFMDG3OldSimulator |
72 | // This is a concrete implementation of AliFMDSimulator. It |
73 | // approximates the of the rings as segmented disks. |
74 | // |
1a1fdef7 |
75 | #include "AliFMDSimulator.h" // ALIFMDSIMULATOR_H |
76 | #include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H |
77 | #include "AliFMDDetector.h" // ALIFMDDETECTOR_H |
78 | #include "AliFMDRing.h" // ALIFMDRING_H |
79 | #include "AliFMD1.h" // ALIFMD1_H |
80 | #include "AliFMD2.h" // ALIFMD2_H |
81 | #include "AliFMD3.h" // ALIFMD3_H |
82 | #include "AliFMD.h" // ALIFMD_H |
83 | #include <AliRun.h> // ALIRUN_H |
84 | #include <AliMC.h> // ALIMC_H |
85 | #include <AliMagF.h> // ALIMAGF_H |
86 | #include <AliLog.h> // ALILOG_H |
87 | #include <TGeoVolume.h> // ROOT_TGeoVolume |
88 | #include <TGeoTube.h> // ROOT_TGeoTube |
89 | #include <TGeoPcon.h> // ROOT_TGeoPcon |
90 | #include <TGeoMaterial.h> // ROOT_TGeoMaterial |
91 | #include <TGeoMedium.h> // ROOT_TGeoMedium |
92 | #include <TGeoXtru.h> // ROOT_TGeoXtru |
93 | #include <TGeoPolygon.h> // ROOT_TGeoPolygon |
94 | #include <TGeoTube.h> // ROOT_TGeoTube |
95 | #include <TGeoManager.h> // ROOT_TGeoManager |
96 | #include <TTree.h> // ROOT_TTree |
97 | #include <TParticle.h> // ROOT_TParticle |
98 | #include <TLorentzVector.h> // ROOT_TLorentzVector |
99 | #include <TVector2.h> // ROOT_TVector2 |
100 | #include <TVector3.h> // ROOT_TVector3 |
101 | #include <TVirtualMC.h> // ROOT_TVirtualMC |
102 | #include <TArrayD.h> // ROOT_TArrayD |
103 | |
104 | //==================================================================== |
105 | ClassImp(AliFMDSimulator) |
106 | #if 0 |
107 | ; // This is here to keep Emacs for indenting the next line |
108 | #endif |
109 | |
110 | //____________________________________________________________________ |
111 | const Char_t* AliFMDSimulator::fgkActiveName = "F%cAC"; |
112 | const Char_t* AliFMDSimulator::fgkSectorName = "F%cSE"; |
113 | const Char_t* AliFMDSimulator::fgkStripName = "F%cST"; |
114 | const Char_t* AliFMDSimulator::fgkModuleName = "F%cMO"; |
115 | const Char_t* AliFMDSimulator::fgkPCBName = "F%cP%c"; |
116 | const Char_t* AliFMDSimulator::fgkLongLegName = "F%cLL"; |
117 | const Char_t* AliFMDSimulator::fgkShortLegName = "F%cSL"; |
118 | const Char_t* AliFMDSimulator::fgkFrontVName = "F%cFV"; |
119 | const Char_t* AliFMDSimulator::fgkBackVName = "F%cBV"; |
120 | const Char_t* AliFMDSimulator::fgkRingName = "FMD%c"; |
121 | const Char_t* AliFMDSimulator::fgkTopHCName = "F%d%cI"; |
122 | const Char_t* AliFMDSimulator::fgkBotHCName = "F%d%cJ"; |
123 | const Char_t* AliFMDSimulator::fgkTopIHCName = "F%d%cK"; |
124 | const Char_t* AliFMDSimulator::fgkBotIHCName = "F%d%cL"; |
125 | const Char_t* AliFMDSimulator::fgkNoseName = "F3SN"; |
126 | const Char_t* AliFMDSimulator::fgkBackName = "F3SB"; |
127 | const Char_t* AliFMDSimulator::fgkBeamName = "F3SL"; |
128 | const Char_t* AliFMDSimulator::fgkFlangeName = "F3SF"; |
129 | |
130 | //____________________________________________________________________ |
131 | AliFMDSimulator::AliFMDSimulator() |
132 | : fFMD(0), |
133 | fDetailed(kFALSE), |
134 | fInnerId(-1), |
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135 | fOuterId(-1), |
136 | fActiveId(4), |
137 | fUseDivided(kFALSE), |
138 | fUseAssembly(kTRUE) |
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139 | { |
140 | // Default constructor |
141 | } |
142 | |
143 | //____________________________________________________________________ |
144 | AliFMDSimulator::AliFMDSimulator(AliFMD* fmd, Bool_t detailed) |
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145 | : TTask("FMDSimulator", "Forward Multiplicity Detector Simulator"), |
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146 | fFMD(fmd), |
147 | fDetailed(detailed), |
148 | fInnerId(-1), |
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149 | fOuterId(-1), |
150 | fActiveId(4), |
151 | fUseDivided(kFALSE), |
152 | fUseAssembly(kTRUE) |
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153 | { |
154 | // Normal constructor |
155 | // |
156 | // Parameters: |
157 | // |
158 | // fmd Pointer to AliFMD object |
159 | // detailed Whether to make a detailed simulation or not |
160 | // |
161 | } |
162 | |
163 | |
164 | //____________________________________________________________________ |
165 | void |
166 | AliFMDSimulator::DefineMaterials() |
167 | { |
168 | // Define the materials and tracking mediums needed by the FMD |
169 | // simulation. These mediums are made by sending the messages |
170 | // AliMaterial, AliMixture, and AliMedium to the passed AliModule |
171 | // object module. The defined mediums are |
172 | // |
173 | // FMD Si$ Silicon (active medium in sensors) |
174 | // FMD C$ Carbon fibre (support cone for FMD3 and vacuum pipe) |
175 | // FMD Al$ Aluminium (honeycomb support plates) |
176 | // FMD PCB$ Printed Circuit Board (FEE board with VA1_ALICE) |
177 | // FMD Chip$ Electronics chips (currently not used) |
178 | // FMD Air$ Air (Air in the FMD) |
179 | // FMD Plastic$ Plastic (Support legs for the hybrid cards) |
180 | // |
181 | // Pointers to TGeoMedium objects are retrived from the TGeoManager |
182 | // singleton. These pointers are later used when setting up the |
183 | // geometry |
184 | AliDebug(10, "\tCreating materials"); |
185 | // Get pointer to geometry singleton object. |
186 | AliFMDGeometry* geometry = AliFMDGeometry::Instance(); |
187 | geometry->Init(); |
188 | |
189 | Int_t id; |
190 | Double_t a = 0; |
191 | Double_t z = 0; |
192 | Double_t density = 0; |
193 | Double_t radiationLength = 0; |
194 | Double_t absorbtionLength = 999; |
195 | Int_t fieldType = gAlice->Field()->Integ(); // Field type |
196 | Double_t maxField = gAlice->Field()->Max(); // Field max. |
197 | Double_t maxBending = 0; // Max Angle |
198 | Double_t maxStepSize = 0.001; // Max step size |
199 | Double_t maxEnergyLoss = 1; // Max Delta E |
200 | Double_t precision = 0.001; // Precision |
201 | Double_t minStepSize = 0.001; // Minimum step size |
202 | |
203 | // Silicon |
204 | a = 28.0855; |
205 | z = 14.; |
206 | density = geometry->GetSiDensity(); |
207 | radiationLength = 9.36; |
208 | maxBending = 1; |
209 | maxStepSize = .001; |
210 | precision = .001; |
211 | minStepSize = .001; |
212 | id = kSiId; |
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213 | fFMD->AliMaterial(id, "Si$", |
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214 | a, z, density, radiationLength, absorbtionLength); |
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215 | fFMD->AliMedium(kSiId, "Si$", |
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216 | id,1,fieldType,maxField,maxBending, |
217 | maxStepSize,maxEnergyLoss,precision,minStepSize); |
218 | |
219 | |
220 | // Carbon |
221 | a = 12.011; |
222 | z = 6.; |
223 | density = 2.265; |
224 | radiationLength = 18.8; |
225 | maxBending = 10; |
226 | maxStepSize = .01; |
227 | precision = .003; |
228 | minStepSize = .003; |
229 | id = kCarbonId; |
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230 | fFMD->AliMaterial(id, "Carbon$", |
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231 | a, z, density, radiationLength, absorbtionLength); |
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232 | fFMD->AliMedium(kCarbonId, "Carbon$", |
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233 | id,0,fieldType,maxField,maxBending, |
234 | maxStepSize,maxEnergyLoss,precision,minStepSize); |
235 | |
236 | // Aluminum |
237 | a = 26.981539; |
238 | z = 13.; |
239 | density = 2.7; |
240 | radiationLength = 8.9; |
241 | id = kAlId; |
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242 | fFMD->AliMaterial(id, "Aluminum$", |
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243 | a, z, density, radiationLength, absorbtionLength); |
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244 | fFMD->AliMedium(kAlId, "Aluminum$", |
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245 | id, 0, fieldType, maxField, maxBending, |
246 | maxStepSize, maxEnergyLoss, precision, minStepSize); |
247 | |
248 | |
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249 | // Copper |
250 | a = 63.546; |
251 | z = 29; |
252 | density = 8.96; |
253 | radiationLength = 1.43; |
254 | id = kCopperId; |
255 | fFMD->AliMaterial(id, "Copper$", |
256 | a, z, density, radiationLength, absorbtionLength); |
257 | fFMD->AliMedium(kCopperId, "Copper$", |
258 | id, 0, fieldType, maxField, maxBending, |
259 | maxStepSize, maxEnergyLoss, precision, minStepSize); |
260 | |
261 | |
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262 | // Silicon chip |
263 | { |
264 | Float_t as[] = { 12.0107, 14.0067, 15.9994, |
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265 | 1.00794, 28.0855, 107.8682 }; |
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266 | Float_t zs[] = { 6., 7., 8., |
267 | 1., 14., 47. }; |
268 | Float_t ws[] = { 0.039730642, 0.001396798, 0.01169634, |
269 | 0.004367771, 0.844665, 0.09814344903 }; |
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270 | density = 2.36436; |
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271 | maxBending = 10; |
272 | maxStepSize = .01; |
273 | precision = .003; |
274 | minStepSize = .003; |
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275 | id = kSiChipId; |
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276 | fFMD->AliMixture(id, "Si Chip$", as, zs, density, 6, ws); |
277 | fFMD->AliMedium(kSiChipId, "Si Chip$", |
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278 | id, 0, fieldType, maxField, maxBending, |
279 | maxStepSize, maxEnergyLoss, precision, minStepSize); |
280 | } |
281 | |
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282 | // Kaption |
283 | { |
284 | Float_t as[] = { 1.00794, 12.0107, 14.010, 15.9994}; |
285 | Float_t zs[] = { 1., 6., 7., 8.}; |
286 | Float_t ws[] = { 0.026362, 0.69113, 0.07327, 0.209235}; |
287 | density = 1.42; |
288 | maxBending = 1; |
289 | maxStepSize = .001; |
290 | precision = .001; |
291 | minStepSize = .001; |
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292 | id = kKaptonId; |
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293 | fFMD->AliMixture(id, "Kaption$", as, zs, density, 4, ws); |
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294 | fFMD->AliMedium(kKaptonId, "Kaption$", |
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295 | id,0,fieldType,maxField,maxBending, |
296 | maxStepSize,maxEnergyLoss,precision,minStepSize); |
297 | } |
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298 | |
299 | // Air |
300 | { |
301 | Float_t as[] = { 12.0107, 14.0067, 15.9994, 39.948 }; |
302 | Float_t zs[] = { 6., 7., 8., 18. }; |
303 | Float_t ws[] = { 0.000124, 0.755267, 0.231781, 0.012827 }; |
304 | density = .00120479; |
305 | maxBending = 1; |
306 | maxStepSize = .001; |
307 | precision = .001; |
308 | minStepSize = .001; |
309 | id = kAirId; |
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310 | fFMD->AliMixture(id, "Air$", as, zs, density, 4, ws); |
311 | fFMD->AliMedium(kAirId, "Air$", |
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312 | id,0,fieldType,maxField,maxBending, |
313 | maxStepSize,maxEnergyLoss,precision,minStepSize); |
314 | } |
315 | |
316 | // PCB |
317 | { |
318 | Float_t zs[] = { 14., 20., 13., 12., |
319 | 5., 22., 11., 19., |
320 | 26., 9., 8., 6., |
321 | 7., 1.}; |
322 | Float_t as[] = { 28.0855, 40.078, 26.981538, 24.305, |
323 | 10.811, 47.867, 22.98977, 39.0983, |
324 | 55.845, 18.9984, 15.9994, 12.0107, |
325 | 14.0067, 1.00794}; |
326 | Float_t ws[] = { 0.15144894, 0.08147477, 0.04128158, 0.00904554, |
327 | 0.01397570, 0.00287685, 0.00445114, 0.00498089, |
328 | 0.00209828, 0.00420000, 0.36043788, 0.27529426, |
329 | 0.01415852, 0.03427566}; |
330 | density = 1.8; |
331 | maxBending = 1; |
332 | maxStepSize = .001; |
333 | precision = .001; |
334 | minStepSize = .001; |
335 | id = kPcbId; |
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336 | fFMD->AliMixture(id, "PCB$", as, zs, density, 14, ws); |
337 | fFMD->AliMedium(kPcbId, "PCB$", |
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338 | id,0,fieldType,maxField,maxBending, |
339 | maxStepSize,maxEnergyLoss,precision,minStepSize); |
340 | } |
341 | |
342 | // Plastic |
343 | { |
344 | Float_t as[] = { 1.01, 12.01 }; |
345 | Float_t zs[] = { 1., 6. }; |
346 | Float_t ws[] = { 1., 1. }; |
347 | density = 1.03; |
348 | maxBending = 10; |
349 | maxStepSize = .01; |
350 | precision = .003; |
351 | minStepSize = .003; |
352 | id = kPlasticId; |
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353 | fFMD->AliMixture(id, "Plastic$", as, zs, density, -2, ws); |
354 | fFMD->AliMedium(kPlasticId, "Plastic$", |
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355 | id,0,fieldType,maxField,maxBending, |
356 | maxStepSize,maxEnergyLoss,precision,minStepSize); |
357 | } |
358 | } |
359 | |
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360 | //____________________________________________________________________ |
361 | Bool_t |
362 | AliFMDSimulator::IsActive(Int_t volId) const |
363 | { |
364 | for (Int_t i = 0; i < fActiveId.fN; i++) |
365 | if (volId == fActiveId[i]) return kTRUE; |
366 | return kFALSE; |
367 | } |
368 | |
369 | //____________________________________________________________________ |
370 | Bool_t |
371 | AliFMDSimulator::VMC2FMD(TLorentzVector& v, UShort_t& detector, |
372 | Char_t& ring, UShort_t& sector, UShort_t& strip) |
373 | { |
374 | TVirtualMC* mc = TVirtualMC::GetMC(); |
375 | |
376 | // Get track position |
377 | mc->TrackPosition(v); |
378 | Int_t moduleno; mc->CurrentVolOffID(fModuleOff, moduleno); |
379 | Int_t iring; mc->CurrentVolOffID(fRingOff, iring); ring = Char_t(iring); |
380 | Int_t det; mc->CurrentVolOffID(fDetectorOff, det); detector = det; |
381 | |
382 | |
383 | // Get the ring geometry |
384 | AliFMDGeometry* fmd = AliFMDGeometry::Instance(); |
385 | //Int_t nsec = fmd->GetDetector(detector)->GetRing(ring)->GetNSectors(); |
386 | Int_t nstr = fmd->GetDetector(detector)->GetRing(ring)->GetNStrips(); |
387 | Double_t lowr = fmd->GetDetector(detector)->GetRing(ring)->GetLowR(); |
388 | Double_t highr= fmd->GetDetector(detector)->GetRing(ring)->GetHighR(); |
389 | Double_t theta= fmd->GetDetector(detector)->GetRing(ring)->GetTheta(); |
390 | |
391 | // Figure out the strip number |
392 | Double_t r = TMath::Sqrt(v.X() * v.X() + v.Y() * v.Y()); |
393 | Double_t pitch = (highr - lowr) / nstr; |
394 | Int_t str = Int_t((r - lowr) / pitch); |
395 | if (str < 0 || str >= nstr) return kFALSE; |
396 | strip = str; |
397 | |
398 | // Figure out the sector number |
399 | Double_t phi = TMath::ATan2(v.Y(), v.X()) * 180. / TMath::Pi(); |
400 | if (phi < 0) phi = 360. + phi; |
401 | Double_t t = phi - 2 * moduleno * theta; |
402 | sector = 2 * moduleno; |
403 | if (t < 0 || t > 2 * theta) return kFALSE; |
404 | else if (t > theta) sector += 1; |
405 | |
406 | AliDebug(40, Form("<1> Inside an active FMD volume FMD%d%c[%2d,%3d] %s", |
407 | detector, ring, sector, strip, mc->CurrentVolPath())); |
408 | return kTRUE; |
409 | } |
410 | |
411 | //____________________________________________________________________ |
412 | Bool_t |
413 | AliFMDSimulator::VMC2FMD(Int_t copy, TLorentzVector& v, |
414 | UShort_t& detector, Char_t& ring, |
415 | UShort_t& sector, UShort_t& strip) |
416 | { |
417 | TVirtualMC* mc = TVirtualMC::GetMC(); |
418 | |
419 | strip = copy - 1; |
420 | Int_t sectordiv; mc->CurrentVolOffID(fSectorOff, sectordiv); |
421 | if (fModuleOff >= 0) { |
422 | Int_t module; mc->CurrentVolOffID(fModuleOff, module); |
423 | sector = 2 * module + sectordiv; |
424 | } |
425 | else |
426 | sector = sectordiv; |
427 | Int_t iring; mc->CurrentVolOffID(fRingOff, iring); ring = Char_t(iring); |
428 | Int_t det; mc->CurrentVolOffID(fDetectorOff, det); detector = det; |
429 | |
430 | AliFMDGeometry* fmd = AliFMDGeometry::Instance(); |
431 | Double_t rz = fmd->GetDetector(detector)->GetRingZ(ring); |
432 | Int_t n = fmd->GetDetector(detector)->GetRing(ring)->GetNSectors(); |
433 | #if 0 |
434 | if (rz < 0) { |
435 | Int_t s = ((n - sector + n / 2) % n) + 1; |
436 | AliDebug(1, Form("Recalculating sector to %d (=%d-%d+%d/2%%%d+1 z=%f)", |
437 | s, n, sector, n, n, rz)); |
438 | sector = s; |
439 | } |
440 | #endif |
441 | if (sector < 1 || sector > n) { |
442 | Warning("Step", "sector # %d out of range (0-%d)", sector-1, n-1); |
443 | return kFALSE; |
444 | } |
445 | sector--; |
446 | // Get track position |
447 | mc->TrackPosition(v); |
448 | AliDebug(40, Form("<2> Inside an active FMD volume FMD%d%c[%2d,%3d] %s", |
449 | detector, ring, sector, strip, mc->CurrentVolPath())); |
450 | |
451 | return kTRUE; |
452 | } |
453 | |
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454 | //____________________________________________________________________ |
455 | void |
456 | AliFMDSimulator::Exec(Option_t* /* option */) |
457 | { |
458 | // Member function that is executed each time a hit is made in the |
459 | // FMD. None-charged particles are ignored. Dead tracks are |
460 | // ignored. |
461 | // |
462 | // The procedure is as follows: |
463 | // |
464 | // - IF NOT track is alive THEN RETURN ENDIF |
465 | // - IF NOT particle is charged THEN RETURN ENDIF |
466 | // - IF NOT volume name is "STRI" or "STRO" THEN RETURN ENDIF |
467 | // - Get strip number (volume copy # minus 1) |
468 | // - Get phi division number (mother volume copy #) |
469 | // - Get module number (grand-mother volume copy #) |
470 | // - section # = 2 * module # + phi division # - 1 |
471 | // - Get ring Id from volume name |
472 | // - Get detector # from grand-grand-grand-mother volume name |
473 | // - Get pointer to sub-detector object. |
474 | // - Get track position |
475 | // - IF track is entering volume AND track is inside real shape THEN |
476 | // - Reset energy deposited |
477 | // - Get track momentum |
478 | // - Get particle ID # |
479 | /// - ENDIF |
480 | // - IF track is inside volume AND inside real shape THEN |
481 | /// - Update energy deposited |
482 | // - ENDIF |
483 | // - IF track is inside real shape AND (track is leaving volume, |
484 | // or it died, or it is stopped THEN |
485 | // - Create a hit |
486 | // - ENDIF |
487 | // |
488 | TVirtualMC* mc = TVirtualMC::GetMC(); |
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489 | if (!mc->IsTrackAlive()) return; |
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490 | Double_t absQ = TMath::Abs(mc->TrackCharge()); |
491 | if (absQ <= 0) return; |
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492 | |
493 | Int_t copy; |
494 | Int_t vol = mc->CurrentVolID(copy); |
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495 | if (!IsActive(vol)) { |
496 | AliDebug(50, Form("Not an FMD volume %d '%s' (%d or %d)", |
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497 | vol, mc->CurrentVolName(), fInnerId, fOuterId)); |
498 | return; |
499 | } |
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500 | TLorentzVector v; |
501 | UShort_t detector; |
502 | Char_t ring; |
503 | UShort_t sector; |
504 | UShort_t strip; |
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505 | |
4ac75127 |
506 | if (fUseDivided) { |
507 | if (!VMC2FMD(copy, v, detector, ring, sector, strip)) return; |
508 | } else { |
509 | if (!VMC2FMD(v, detector, ring, sector, strip)) return; |
1a1fdef7 |
510 | } |
4ac75127 |
511 | TLorentzVector p; |
512 | mc->TrackMomentum(p); |
513 | Int_t trackno = gAlice->GetMCApp()->GetCurrentTrackNumber(); |
514 | Int_t pdg = mc->TrackPid(); |
515 | Double_t mass = mc->TrackMass(); |
516 | Double_t edep = mc->Edep() * 1000; // keV |
517 | Double_t poverm = (mass == 0 ? 0 : p.P() / mass); |
518 | |
519 | // This `if' is to debug abnormal energy depositions. We trigger on |
520 | // p/m approx larger than or equal to a MIP, and a large edep - more |
521 | // than 1 keV - a MIP is 100 eV. |
522 | if (mc->Edep() * 1000 > absQ * absQ && poverm > 1) { |
a3537838 |
523 | TArrayI procs; |
524 | mc->StepProcesses(procs); |
a3537838 |
525 | TString processes; |
526 | for (Int_t ip = 0; ip < procs.fN; ip++) { |
527 | if (ip != 0) processes.Append(","); |
528 | processes.Append(TMCProcessName[procs.fArray[ip]]); |
529 | } |
4ac75127 |
530 | TDatabasePDG* pdgDB = TDatabasePDG::Instance(); |
531 | TParticlePDG* particleType = pdgDB->GetParticle(pdg); |
532 | TString pname(particleType ? particleType->GetName() : "???"); |
a3537838 |
533 | TString what; |
534 | if (mc->IsTrackEntering()) what.Append("entering "); |
535 | if (mc->IsTrackExiting()) what.Append("exiting "); |
536 | if (mc->IsTrackInside()) what.Append("inside "); |
537 | if (mc->IsTrackDisappeared()) what.Append("disappeared "); |
538 | if (mc->IsTrackStop()) what.Append("stopped "); |
539 | if (mc->IsNewTrack()) what.Append("new "); |
540 | if (mc->IsTrackAlive()) what.Append("alive "); |
541 | if (mc->IsTrackOut()) what.Append("out "); |
542 | |
543 | Int_t mother = gAlice->GetMCApp()->GetPrimary(trackno); |
4ac75127 |
544 | Warning("Step", "Track # %5d deposits a lot of energy\n" |
545 | " Volume: %s\n" |
546 | " Momentum: (%8.4f,%8.4f,%8.4f)\n" |
547 | " PDG: %d (%s)\n" |
548 | " Edep: %-16.8f keV (mother %d)\n" |
549 | " p/m: %-16.8f\n" |
550 | " Processes: %s\n" |
551 | " What: %s\n", |
552 | trackno, mc->CurrentVolPath(), p.X(), p.Y(), p.Z(), |
553 | pdg, pname.Data(), edep, mother, poverm, processes.Data(), |
554 | what.Data()); |
a3537838 |
555 | } |
556 | |
4ac75127 |
557 | // Check that the track is actually within the active area |
558 | Bool_t entering = mc->IsTrackEntering(); |
559 | Bool_t inside = mc->IsTrackInside(); |
560 | Bool_t out = (mc->IsTrackExiting()|| mc->IsTrackDisappeared()|| |
561 | mc->IsTrackStop()); |
562 | // Reset the energy deposition for this track, and update some of |
563 | // our parameters. |
564 | if (entering) { |
565 | AliDebug(15, Form("Track # %8d entering active FMD volume %s: " |
566 | "Edep=%f", |
567 | gAlice->GetMCApp()->GetCurrentTrackNumber(), |
568 | mc->CurrentVolPath(), 1000 * mc->Edep())); |
569 | fCurrentP = p; |
570 | fCurrentV = v; |
571 | fCurrentDeltaE = edep; |
572 | fCurrentPdg = mc->IdFromPDG(pdg); |
573 | } |
1a1fdef7 |
574 | // If the track is inside, then update the energy deposition |
baa92757 |
575 | if (inside && fCurrentDeltaE >= 0) { |
4ac75127 |
576 | fCurrentDeltaE += edep; |
baa92757 |
577 | AliDebug(15, Form("Track # %8d inside active FMD volume %s: Edep=%f, " |
4ac75127 |
578 | "Accumulated Edep=%f", |
579 | trackno, mc->CurrentVolPath(), edep, |
580 | fCurrentDeltaE)); |
baa92757 |
581 | } |
1a1fdef7 |
582 | // The track exits the volume, or it disappeared in the volume, or |
583 | // the track is stopped because it no longer fulfills the cuts |
584 | // defined, then we create a hit. |
585 | if (out && fCurrentDeltaE >= 0) { |
4ac75127 |
586 | fCurrentDeltaE += edep; |
587 | fFMD->AddHitByFields(trackno, detector, ring, sector, strip, |
588 | fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(), |
589 | fCurrentP.X(), fCurrentP.Y(), fCurrentP.Z(), |
590 | fCurrentDeltaE, fCurrentPdg, fCurrentV.T()); |
1a1fdef7 |
591 | fCurrentDeltaE = -1; |
592 | } |
593 | } |
594 | |
595 | |
596 | |
597 | //____________________________________________________________________ |
598 | // |
599 | // EOF |
600 | // |