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1a1fdef7 | 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 | | |
40 | // +--------------------+ +---------+---------+ | |
41 | // | |
42 | // | |
43 | // * AliFMD | |
44 | // This defines the interface for the various parts of AliROOT that | |
45 | // uses the FMD, like AliFMDSimulator, AliFMDDigitizer, | |
46 | // AliFMDReconstructor, and so on. | |
47 | // | |
48 | // * AliFMDSimulator | |
49 | // This is the base class for the FMD simulation tasks. The | |
50 | // simulator tasks are responsible to implment the geoemtry, and | |
51 | // process hits. | |
52 | // | |
53 | // * AliFMDGeoSimulator | |
54 | // This is a concrete implementation of the AliFMDSimulator that | |
55 | // uses the TGeo classes directly only. This defines the active | |
56 | // volume as an ONLY XTRU shape with a divided MANY TUBS shape | |
57 | // inside to implement the particular shape of the silicon | |
58 | // sensors. | |
59 | // | |
60 | // * AliFMDG3Simulator | |
61 | // This is a concrete implementation of the AliFMDSimulator that | |
62 | // uses the TVirtualMC interface with GEANT 3.21-like messages. | |
63 | // This implements the active volume as a divided TUBS shape. Hits | |
64 | // in the corners should be cut away at run time (but currently | |
65 | // isn't). | |
66 | // | |
67 | #include "AliFMDSimulator.h" // ALIFMDSIMULATOR_H | |
68 | #include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H | |
69 | #include "AliFMDDetector.h" // ALIFMDDETECTOR_H | |
70 | #include "AliFMDRing.h" // ALIFMDRING_H | |
71 | #include "AliFMD1.h" // ALIFMD1_H | |
72 | #include "AliFMD2.h" // ALIFMD2_H | |
73 | #include "AliFMD3.h" // ALIFMD3_H | |
74 | #include "AliFMD.h" // ALIFMD_H | |
75 | #include <AliRun.h> // ALIRUN_H | |
76 | #include <AliMC.h> // ALIMC_H | |
77 | #include <AliMagF.h> // ALIMAGF_H | |
78 | #include <AliLog.h> // ALILOG_H | |
79 | #include <TGeoVolume.h> // ROOT_TGeoVolume | |
80 | #include <TGeoTube.h> // ROOT_TGeoTube | |
81 | #include <TGeoPcon.h> // ROOT_TGeoPcon | |
82 | #include <TGeoMaterial.h> // ROOT_TGeoMaterial | |
83 | #include <TGeoMedium.h> // ROOT_TGeoMedium | |
84 | #include <TGeoXtru.h> // ROOT_TGeoXtru | |
85 | #include <TGeoPolygon.h> // ROOT_TGeoPolygon | |
86 | #include <TGeoTube.h> // ROOT_TGeoTube | |
87 | #include <TGeoManager.h> // ROOT_TGeoManager | |
88 | #include <TTree.h> // ROOT_TTree | |
89 | #include <TParticle.h> // ROOT_TParticle | |
90 | #include <TLorentzVector.h> // ROOT_TLorentzVector | |
91 | #include <TVector2.h> // ROOT_TVector2 | |
92 | #include <TVector3.h> // ROOT_TVector3 | |
93 | #include <TVirtualMC.h> // ROOT_TVirtualMC | |
94 | #include <TArrayD.h> // ROOT_TArrayD | |
95 | ||
96 | //==================================================================== | |
97 | ClassImp(AliFMDSimulator) | |
98 | #if 0 | |
99 | ; // This is here to keep Emacs for indenting the next line | |
100 | #endif | |
101 | ||
102 | //____________________________________________________________________ | |
103 | const Char_t* AliFMDSimulator::fgkActiveName = "F%cAC"; | |
104 | const Char_t* AliFMDSimulator::fgkSectorName = "F%cSE"; | |
105 | const Char_t* AliFMDSimulator::fgkStripName = "F%cST"; | |
106 | const Char_t* AliFMDSimulator::fgkModuleName = "F%cMO"; | |
107 | const Char_t* AliFMDSimulator::fgkPCBName = "F%cP%c"; | |
108 | const Char_t* AliFMDSimulator::fgkLongLegName = "F%cLL"; | |
109 | const Char_t* AliFMDSimulator::fgkShortLegName = "F%cSL"; | |
110 | const Char_t* AliFMDSimulator::fgkFrontVName = "F%cFV"; | |
111 | const Char_t* AliFMDSimulator::fgkBackVName = "F%cBV"; | |
112 | const Char_t* AliFMDSimulator::fgkRingName = "FMD%c"; | |
113 | const Char_t* AliFMDSimulator::fgkTopHCName = "F%d%cI"; | |
114 | const Char_t* AliFMDSimulator::fgkBotHCName = "F%d%cJ"; | |
115 | const Char_t* AliFMDSimulator::fgkTopIHCName = "F%d%cK"; | |
116 | const Char_t* AliFMDSimulator::fgkBotIHCName = "F%d%cL"; | |
117 | const Char_t* AliFMDSimulator::fgkNoseName = "F3SN"; | |
118 | const Char_t* AliFMDSimulator::fgkBackName = "F3SB"; | |
119 | const Char_t* AliFMDSimulator::fgkBeamName = "F3SL"; | |
120 | const Char_t* AliFMDSimulator::fgkFlangeName = "F3SF"; | |
121 | ||
122 | //____________________________________________________________________ | |
123 | AliFMDSimulator::AliFMDSimulator() | |
124 | : fFMD(0), | |
125 | fDetailed(kFALSE), | |
126 | fInnerId(-1), | |
127 | fOuterId(-1) | |
128 | { | |
129 | // Default constructor | |
130 | } | |
131 | ||
132 | //____________________________________________________________________ | |
133 | AliFMDSimulator::AliFMDSimulator(AliFMD* fmd, Bool_t detailed) | |
134 | : TTask("FMDsimulator", "Forward Multiplicity Detector Simulator"), | |
135 | fFMD(fmd), | |
136 | fDetailed(detailed), | |
137 | fInnerId(-1), | |
138 | fOuterId(-1) | |
139 | { | |
140 | // Normal constructor | |
141 | // | |
142 | // Parameters: | |
143 | // | |
144 | // fmd Pointer to AliFMD object | |
145 | // detailed Whether to make a detailed simulation or not | |
146 | // | |
147 | } | |
148 | ||
149 | ||
150 | //____________________________________________________________________ | |
151 | void | |
152 | AliFMDSimulator::DefineMaterials() | |
153 | { | |
154 | // Define the materials and tracking mediums needed by the FMD | |
155 | // simulation. These mediums are made by sending the messages | |
156 | // AliMaterial, AliMixture, and AliMedium to the passed AliModule | |
157 | // object module. The defined mediums are | |
158 | // | |
159 | // FMD Si$ Silicon (active medium in sensors) | |
160 | // FMD C$ Carbon fibre (support cone for FMD3 and vacuum pipe) | |
161 | // FMD Al$ Aluminium (honeycomb support plates) | |
162 | // FMD PCB$ Printed Circuit Board (FEE board with VA1_ALICE) | |
163 | // FMD Chip$ Electronics chips (currently not used) | |
164 | // FMD Air$ Air (Air in the FMD) | |
165 | // FMD Plastic$ Plastic (Support legs for the hybrid cards) | |
166 | // | |
167 | // Pointers to TGeoMedium objects are retrived from the TGeoManager | |
168 | // singleton. These pointers are later used when setting up the | |
169 | // geometry | |
170 | AliDebug(10, "\tCreating materials"); | |
171 | // Get pointer to geometry singleton object. | |
172 | AliFMDGeometry* geometry = AliFMDGeometry::Instance(); | |
173 | geometry->Init(); | |
174 | ||
175 | Int_t id; | |
176 | Double_t a = 0; | |
177 | Double_t z = 0; | |
178 | Double_t density = 0; | |
179 | Double_t radiationLength = 0; | |
180 | Double_t absorbtionLength = 999; | |
181 | Int_t fieldType = gAlice->Field()->Integ(); // Field type | |
182 | Double_t maxField = gAlice->Field()->Max(); // Field max. | |
183 | Double_t maxBending = 0; // Max Angle | |
184 | Double_t maxStepSize = 0.001; // Max step size | |
185 | Double_t maxEnergyLoss = 1; // Max Delta E | |
186 | Double_t precision = 0.001; // Precision | |
187 | Double_t minStepSize = 0.001; // Minimum step size | |
188 | ||
189 | // Silicon | |
190 | a = 28.0855; | |
191 | z = 14.; | |
192 | density = geometry->GetSiDensity(); | |
193 | radiationLength = 9.36; | |
194 | maxBending = 1; | |
195 | maxStepSize = .001; | |
196 | precision = .001; | |
197 | minStepSize = .001; | |
198 | id = kSiId; | |
4a9de4af | 199 | fFMD->AliMaterial(id, "Si$", |
1a1fdef7 | 200 | a, z, density, radiationLength, absorbtionLength); |
4a9de4af | 201 | fFMD->AliMedium(kSiId, "Si$", |
1a1fdef7 | 202 | id,1,fieldType,maxField,maxBending, |
203 | maxStepSize,maxEnergyLoss,precision,minStepSize); | |
204 | ||
205 | ||
206 | // Carbon | |
207 | a = 12.011; | |
208 | z = 6.; | |
209 | density = 2.265; | |
210 | radiationLength = 18.8; | |
211 | maxBending = 10; | |
212 | maxStepSize = .01; | |
213 | precision = .003; | |
214 | minStepSize = .003; | |
215 | id = kCarbonId; | |
4a9de4af | 216 | fFMD->AliMaterial(id, "Carbon$", |
1a1fdef7 | 217 | a, z, density, radiationLength, absorbtionLength); |
4a9de4af | 218 | fFMD->AliMedium(kCarbonId, "Carbon$", |
1a1fdef7 | 219 | id,0,fieldType,maxField,maxBending, |
220 | maxStepSize,maxEnergyLoss,precision,minStepSize); | |
221 | ||
222 | // Aluminum | |
223 | a = 26.981539; | |
224 | z = 13.; | |
225 | density = 2.7; | |
226 | radiationLength = 8.9; | |
227 | id = kAlId; | |
4a9de4af | 228 | fFMD->AliMaterial(id, "Aluminum$", |
1a1fdef7 | 229 | a, z, density, radiationLength, absorbtionLength); |
4a9de4af | 230 | fFMD->AliMedium(kAlId, "Aluminum$", |
1a1fdef7 | 231 | id, 0, fieldType, maxField, maxBending, |
232 | maxStepSize, maxEnergyLoss, precision, minStepSize); | |
233 | ||
234 | ||
235 | // Silicon chip | |
236 | { | |
237 | Float_t as[] = { 12.0107, 14.0067, 15.9994, | |
238 | 1.00794, 28.0855, 107.8682 }; | |
239 | Float_t zs[] = { 6., 7., 8., | |
240 | 1., 14., 47. }; | |
241 | Float_t ws[] = { 0.039730642, 0.001396798, 0.01169634, | |
242 | 0.004367771, 0.844665, 0.09814344903 }; | |
243 | density = 2.36436; | |
244 | maxBending = 10; | |
245 | maxStepSize = .01; | |
246 | precision = .003; | |
247 | minStepSize = .003; | |
248 | id = kSiChipId; | |
4a9de4af | 249 | fFMD->AliMixture(id, "Si Chip$", as, zs, density, 6, ws); |
250 | fFMD->AliMedium(kSiChipId, "Si Chip$", | |
1a1fdef7 | 251 | id, 0, fieldType, maxField, maxBending, |
252 | maxStepSize, maxEnergyLoss, precision, minStepSize); | |
253 | } | |
254 | ||
255 | #if 0 | |
256 | // Kaption | |
257 | { | |
258 | Float_t as[] = { 1.00794, 12.0107, 14.010, 15.9994}; | |
259 | Float_t zs[] = { 1., 6., 7., 8.}; | |
260 | Float_t ws[] = { 0.026362, 0.69113, 0.07327, 0.209235}; | |
261 | density = 1.42; | |
262 | maxBending = 1; | |
263 | maxStepSize = .001; | |
264 | precision = .001; | |
265 | minStepSize = .001; | |
266 | id = KaptionId; | |
4a9de4af | 267 | fFMD->AliMixture(id, "Kaption$", as, zs, density, 4, ws); |
268 | fFMD->AliMedium(kAlId, "Kaption$", | |
1a1fdef7 | 269 | id,0,fieldType,maxField,maxBending, |
270 | maxStepSize,maxEnergyLoss,precision,minStepSize); | |
271 | } | |
272 | #endif | |
273 | ||
274 | // Air | |
275 | { | |
276 | Float_t as[] = { 12.0107, 14.0067, 15.9994, 39.948 }; | |
277 | Float_t zs[] = { 6., 7., 8., 18. }; | |
278 | Float_t ws[] = { 0.000124, 0.755267, 0.231781, 0.012827 }; | |
279 | density = .00120479; | |
280 | maxBending = 1; | |
281 | maxStepSize = .001; | |
282 | precision = .001; | |
283 | minStepSize = .001; | |
284 | id = kAirId; | |
4a9de4af | 285 | fFMD->AliMixture(id, "Air$", as, zs, density, 4, ws); |
286 | fFMD->AliMedium(kAirId, "Air$", | |
1a1fdef7 | 287 | id,0,fieldType,maxField,maxBending, |
288 | maxStepSize,maxEnergyLoss,precision,minStepSize); | |
289 | } | |
290 | ||
291 | // PCB | |
292 | { | |
293 | Float_t zs[] = { 14., 20., 13., 12., | |
294 | 5., 22., 11., 19., | |
295 | 26., 9., 8., 6., | |
296 | 7., 1.}; | |
297 | Float_t as[] = { 28.0855, 40.078, 26.981538, 24.305, | |
298 | 10.811, 47.867, 22.98977, 39.0983, | |
299 | 55.845, 18.9984, 15.9994, 12.0107, | |
300 | 14.0067, 1.00794}; | |
301 | Float_t ws[] = { 0.15144894, 0.08147477, 0.04128158, 0.00904554, | |
302 | 0.01397570, 0.00287685, 0.00445114, 0.00498089, | |
303 | 0.00209828, 0.00420000, 0.36043788, 0.27529426, | |
304 | 0.01415852, 0.03427566}; | |
305 | density = 1.8; | |
306 | maxBending = 1; | |
307 | maxStepSize = .001; | |
308 | precision = .001; | |
309 | minStepSize = .001; | |
310 | id = kPcbId; | |
4a9de4af | 311 | fFMD->AliMixture(id, "PCB$", as, zs, density, 14, ws); |
312 | fFMD->AliMedium(kPcbId, "PCB$", | |
1a1fdef7 | 313 | id,0,fieldType,maxField,maxBending, |
314 | maxStepSize,maxEnergyLoss,precision,minStepSize); | |
315 | } | |
316 | ||
317 | // Plastic | |
318 | { | |
319 | Float_t as[] = { 1.01, 12.01 }; | |
320 | Float_t zs[] = { 1., 6. }; | |
321 | Float_t ws[] = { 1., 1. }; | |
322 | density = 1.03; | |
323 | maxBending = 10; | |
324 | maxStepSize = .01; | |
325 | precision = .003; | |
326 | minStepSize = .003; | |
327 | id = kPlasticId; | |
4a9de4af | 328 | fFMD->AliMixture(id, "Plastic$", as, zs, density, -2, ws); |
329 | fFMD->AliMedium(kPlasticId, "Plastic$", | |
1a1fdef7 | 330 | id,0,fieldType,maxField,maxBending, |
331 | maxStepSize,maxEnergyLoss,precision,minStepSize); | |
332 | } | |
333 | } | |
334 | ||
335 | //____________________________________________________________________ | |
336 | void | |
337 | AliFMDSimulator::Exec(Option_t* /* option */) | |
338 | { | |
339 | // Member function that is executed each time a hit is made in the | |
340 | // FMD. None-charged particles are ignored. Dead tracks are | |
341 | // ignored. | |
342 | // | |
343 | // The procedure is as follows: | |
344 | // | |
345 | // - IF NOT track is alive THEN RETURN ENDIF | |
346 | // - IF NOT particle is charged THEN RETURN ENDIF | |
347 | // - IF NOT volume name is "STRI" or "STRO" THEN RETURN ENDIF | |
348 | // - Get strip number (volume copy # minus 1) | |
349 | // - Get phi division number (mother volume copy #) | |
350 | // - Get module number (grand-mother volume copy #) | |
351 | // - section # = 2 * module # + phi division # - 1 | |
352 | // - Get ring Id from volume name | |
353 | // - Get detector # from grand-grand-grand-mother volume name | |
354 | // - Get pointer to sub-detector object. | |
355 | // - Get track position | |
356 | // - IF track is entering volume AND track is inside real shape THEN | |
357 | // - Reset energy deposited | |
358 | // - Get track momentum | |
359 | // - Get particle ID # | |
360 | /// - ENDIF | |
361 | // - IF track is inside volume AND inside real shape THEN | |
362 | /// - Update energy deposited | |
363 | // - ENDIF | |
364 | // - IF track is inside real shape AND (track is leaving volume, | |
365 | // or it died, or it is stopped THEN | |
366 | // - Create a hit | |
367 | // - ENDIF | |
368 | // | |
369 | TVirtualMC* mc = TVirtualMC::GetMC(); | |
370 | ||
371 | if (!mc->IsTrackAlive()) return; | |
372 | if (TMath::Abs(mc->TrackCharge()) <= 0) return; | |
373 | ||
374 | Int_t copy; | |
375 | Int_t vol = mc->CurrentVolID(copy); | |
376 | if (vol != fInnerId && vol != fOuterId) { | |
377 | AliDebug(15, Form("Not an FMD volume %d '%s' (%d or %d)", | |
378 | vol, mc->CurrentVolName(), fInnerId, fOuterId)); | |
379 | return; | |
380 | } | |
381 | ||
382 | // Check that the track is actually within the active area | |
383 | Bool_t entering = mc->IsTrackEntering(); | |
384 | Bool_t inside = mc->IsTrackInside(); | |
385 | Bool_t out = (mc->IsTrackExiting()|| mc->IsTrackDisappeared()|| | |
386 | mc->IsTrackStop()); | |
387 | ||
388 | // Reset the energy deposition for this track, and update some of | |
389 | // our parameters. | |
390 | if (entering) { | |
391 | AliDebug(15, "Entering active FMD volume"); | |
392 | fCurrentDeltaE = 0; | |
393 | ||
394 | // Get production vertex and momentum of the track | |
395 | mc->TrackMomentum(fCurrentP); | |
396 | mc->TrackPosition(fCurrentV); | |
397 | fCurrentPdg = mc->IdFromPDG(mc->TrackPid()); | |
398 | } | |
399 | ||
400 | // If the track is inside, then update the energy deposition | |
401 | if (inside && fCurrentDeltaE >= 0) | |
402 | AliDebug(15, "Inside active FMD volume"); | |
403 | fCurrentDeltaE += 1000 * mc->Edep(); | |
404 | ||
405 | // The track exits the volume, or it disappeared in the volume, or | |
406 | // the track is stopped because it no longer fulfills the cuts | |
407 | // defined, then we create a hit. | |
408 | if (out && fCurrentDeltaE >= 0) { | |
409 | AliDebug(15, Form("Leaving active FMD volume %s", mc->CurrentVolPath())); | |
410 | ||
411 | Int_t strip = copy - 1; | |
412 | Int_t sectordiv; | |
413 | mc->CurrentVolOffID(fSectorOff, sectordiv); | |
414 | Int_t module; | |
415 | mc->CurrentVolOffID(fModuleOff, module); | |
416 | Int_t sector = 2 * module + sectordiv; | |
417 | Int_t iring; | |
418 | mc->CurrentVolOffID(fRingOff, iring); | |
419 | Char_t ring = Char_t(iring); | |
420 | Int_t detector; | |
421 | mc->CurrentVolOffID(fDetectorOff, detector); | |
422 | ||
423 | ||
424 | AliFMDGeometry* fmd = AliFMDGeometry::Instance(); | |
425 | Double_t rz = fmd->GetDetector(detector)->GetRingZ(ring); | |
426 | Int_t n = fmd->GetDetector(detector)->GetRing(ring)->GetNSectors(); | |
427 | if (rz < 0) { | |
428 | Int_t s = ((n - sector + n / 2) % n) + 1; | |
429 | AliDebug(40, Form("Recalculating sector to %d (=%d-%d+%d/2%%%d+1 z=%f)", | |
430 | s, n, sector, n, n, rz)); | |
431 | sector = s; | |
432 | } | |
433 | if (sector < 1 || sector > n) { | |
434 | Warning("Step", "sector # %d out of range (0-%d)", sector-1, n-1); | |
435 | return; | |
436 | } | |
437 | sector--; | |
438 | fCurrentDeltaE += 1000 * mc->Edep(); | |
439 | ||
440 | AliDebug(20, Form("Processing hit in FMD%d%c[%2d,%3d]: %f", | |
441 | detector, ring, sector, strip, fCurrentDeltaE)); | |
442 | ||
69b696b9 | 443 | fFMD->AddHitByFields(gAlice->GetMCApp()->GetCurrentTrackNumber(), |
444 | UShort_t(detector), ring, UShort_t(sector), | |
445 | UShort_t(strip), | |
446 | fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(), | |
447 | fCurrentP.X(), fCurrentP.Y(), fCurrentP.Z(), | |
448 | fCurrentDeltaE, fCurrentPdg, fCurrentV.T()); | |
1a1fdef7 | 449 | fCurrentDeltaE = -1; |
450 | } | |
451 | } | |
452 | ||
453 | ||
454 | ||
455 | //____________________________________________________________________ | |
456 | // | |
457 | // EOF | |
458 | // |