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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 "AliFMDGeoSimulator.h" // ALIFMDGEOSIMULATOR_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 "AliLog.h" // ALILOG_H | |
76 | #include <TGeoVolume.h> // ROOT_TGeoVolume | |
77 | #include <TGeoTube.h> // ROOT_TGeoTube | |
78 | #include <TGeoPcon.h> // ROOT_TGeoPcon | |
79 | #include <TGeoMaterial.h> // ROOT_TGeoMaterial | |
80 | #include <TGeoMedium.h> // ROOT_TGeoMedium | |
81 | #include <TGeoXtru.h> // ROOT_TGeoXtru | |
82 | #include <TGeoPolygon.h> // ROOT_TGeoPolygon | |
83 | #include <TGeoTube.h> // ROOT_TGeoTube | |
84 | #include <TGeoManager.h> // ROOT_TGeoManager | |
85 | #include <TVector2.h> // ROOT_TVector2 | |
86 | #include <TArrayD.h> // ROOT_TArrayD | |
87 | ||
88 | //==================================================================== | |
89 | ClassImp(AliFMDGeoSimulator) | |
90 | #if 0 | |
91 | ; // This is here to keep Emacs for indenting the next line | |
92 | #endif | |
93 | ||
94 | //____________________________________________________________________ | |
95 | AliFMDGeoSimulator::AliFMDGeoSimulator() | |
96 | : fSi(0), | |
97 | fC(0), | |
98 | fAl(0), | |
99 | fPCB(0), | |
100 | fChip(0), | |
101 | fPlastic(0) | |
102 | { | |
103 | // Default constructor | |
104 | fSectorOff = 1; | |
105 | fModuleOff = 4; | |
106 | fRingOff = 5; | |
107 | fDetectorOff = 6; | |
108 | } | |
109 | ||
110 | //____________________________________________________________________ | |
111 | AliFMDGeoSimulator::AliFMDGeoSimulator(AliFMD* fmd, Bool_t detailed) | |
112 | : AliFMDSimulator(fmd, detailed), | |
113 | fSi(0), | |
114 | fC(0), | |
115 | fAl(0), | |
116 | fPCB(0), | |
117 | fChip(0), | |
118 | fPlastic(0) | |
119 | { | |
120 | // Normal constructor | |
121 | // | |
122 | // Parameters: | |
123 | // | |
124 | // fmd Pointer to AliFMD object | |
125 | // detailed Whether to make a detailed simulation or not | |
126 | // | |
127 | fSectorOff = 1; | |
128 | fModuleOff = 4; | |
129 | fRingOff = 5; | |
130 | fDetectorOff = 6; | |
131 | } | |
132 | ||
133 | //____________________________________________________________________ | |
134 | void | |
135 | AliFMDGeoSimulator::DefineMaterials() | |
136 | { | |
137 | // Define the materials and tracking mediums needed by the FMD | |
138 | // simulation. These mediums are made by sending the messages | |
139 | // AliMaterial, AliMixture, and AliMedium to the passed AliModule | |
140 | // object module. The defined mediums are | |
141 | // | |
142 | // FMD Si$ Silicon (active medium in sensors) | |
143 | // FMD C$ Carbon fibre (support cone for FMD3 and vacuum pipe) | |
144 | // FMD Al$ Aluminium (honeycomb support plates) | |
145 | // FMD PCB$ Printed Circuit Board (FEE board with VA1_ALICE) | |
146 | // FMD Chip$ Electronics chips (currently not used) | |
147 | // FMD Air$ Air (Air in the FMD) | |
148 | // FMD Plastic$ Plastic (Support legs for the hybrid cards) | |
149 | // | |
150 | // Pointers to TGeoMedium objects are retrived from the TGeoManager | |
151 | // singleton. These pointers are later used when setting up the | |
152 | // geometry | |
153 | AliDebug(10, "\tCreating materials"); | |
154 | ||
155 | if (!gGeoManager) { | |
156 | AliFatal("No TGeoManager defined"); | |
157 | return; | |
158 | } | |
159 | AliFMDSimulator::DefineMaterials(); | |
4a9de4af | 160 | fSi = gGeoManager->GetMedium("FMD_Si$"); |
161 | fC = gGeoManager->GetMedium("FMD_Carbon$"); | |
162 | fAl = gGeoManager->GetMedium("FMD_Aluminum$"); | |
163 | fChip = gGeoManager->GetMedium("FMD_Chip$"); | |
164 | fAir = gGeoManager->GetMedium("FMD_Air$"); | |
165 | fPCB = gGeoManager->GetMedium("FMD_PCB$"); | |
166 | fPlastic = gGeoManager->GetMedium("FMD_Plastic$"); | |
1a1fdef7 | 167 | } |
168 | ||
169 | //____________________________________________________________________ | |
170 | TGeoVolume* | |
171 | AliFMDGeoSimulator::RingGeometry(AliFMDRing* r) | |
172 | { | |
173 | // Setup the geometry of a ring. The defined TGeoVolume is | |
174 | // returned, and should be used when setting up the rest of the | |
175 | // volumes. | |
176 | // | |
177 | // | |
178 | // Parameters: | |
179 | // | |
180 | // r Pointer to ring geometry object | |
181 | // | |
182 | // Returns: | |
183 | // pointer to ring volume | |
184 | // | |
185 | if (!r) { | |
186 | AliError("Didn't get a ring object"); | |
187 | return 0; | |
188 | } | |
189 | Char_t id = r->GetId(); | |
190 | Double_t siThick = r->GetSiThickness(); | |
191 | const Int_t nv = r->GetNVerticies(); | |
192 | TVector2* a = r->GetVertex(5); | |
193 | TVector2* b = r->GetVertex(3); | |
194 | TVector2* c = r->GetVertex(4); | |
195 | Double_t theta = r->GetTheta(); | |
196 | Double_t off = (TMath::Tan(TMath::Pi() * theta / 180) | |
197 | * r->GetBondingWidth()); | |
198 | Double_t rmax = b->Mod(); | |
199 | Double_t rmin = r->GetLowR(); | |
200 | Double_t pcbThick = r->GetPrintboardThickness(); | |
201 | Double_t modSpace = r->GetModuleSpacing(); | |
202 | Double_t legr = r->GetLegRadius(); | |
203 | Double_t legl = r->GetLegLength(); | |
204 | Double_t legoff = r->GetLegOffset(); | |
205 | Int_t ns = r->GetNStrips(); | |
206 | Double_t stripoff = a->Mod(); | |
207 | Double_t dstrip = (rmax - stripoff) / ns; | |
208 | TArrayD xs(nv); | |
209 | TArrayD ys(nv); | |
210 | for (Int_t i = 0; i < nv; i++) { | |
211 | // Reverse the order | |
212 | TVector2* vv = r->GetVertex(nv - 1 - i); | |
213 | if (!vv) { | |
214 | AliError(Form("Failed to get vertex # %d", nv - 1 - i)); | |
215 | continue; | |
216 | } | |
217 | xs[i] = vv->X(); | |
218 | ys[i] = vv->Y(); | |
219 | } | |
220 | ||
221 | // Virtual volume shape to divide - This volume is only defined if | |
222 | // the geometry is set to be detailed. | |
223 | Int_t sid = -1; | |
224 | TGeoVolume* activeVolume = 0; | |
225 | if (fDetailed) { | |
226 | TGeoTubeSeg* activeShape = | |
227 | new TGeoTubeSeg(rmin, rmax, siThick/2, - theta, theta); | |
228 | activeVolume = new TGeoVolume(Form(fgkActiveName, id), activeShape, fSi); | |
229 | TGeoVolume* sectorVolume = activeVolume->Divide(Form(fgkSectorName, id), | |
230 | 2, 2, -theta, 0, 0, "N"); | |
231 | TGeoVolume* stripVolume = sectorVolume->Divide(Form(fgkStripName, id), 1, | |
232 | ns, stripoff, dstrip, | |
233 | 0, "SX"); | |
234 | sid = stripVolume->GetNumber(); | |
235 | } | |
236 | ||
237 | // Shape of actual sensor | |
238 | TGeoXtru* moduleShape = new TGeoXtru(2); | |
239 | moduleShape->DefinePolygon(nv, xs.fArray, ys.fArray); | |
240 | moduleShape->DefineSection(0, - siThick/2); | |
241 | moduleShape->DefineSection(1, siThick/2); | |
242 | TGeoVolume* moduleVolume = new TGeoVolume(Form(fgkModuleName, id), | |
243 | moduleShape, fSi); | |
244 | // Add divived MANY volume to the true shape of the module, but only | |
245 | // if a detailed simulation is reguested. | |
246 | if (activeVolume) moduleVolume->AddNodeOverlap(activeVolume, 0); | |
247 | ||
248 | switch (id) { | |
249 | case 'i': | |
250 | case 'I': | |
251 | fInnerId = sid; | |
252 | // fInnerV = moduleVolume->GetNumber(); | |
253 | break; | |
254 | case 'o': | |
255 | case 'O': | |
256 | fOuterId = sid; | |
257 | // fOuterV = moduleVolume->GetNumber(); | |
258 | break; | |
259 | } | |
260 | ||
261 | // Shape of Printed circuit Board | |
262 | TGeoXtru* pcbShape = new TGeoXtru(2); | |
263 | for (Int_t i = 0; i < nv / 2; i++) ys[i] -= off; | |
264 | for (Int_t i = nv / 2; i < nv; i++) ys[i] += off; | |
265 | pcbShape->DefinePolygon(nv, xs.fArray, ys.fArray); | |
266 | pcbShape->DefineSection(0, - pcbThick/2); | |
267 | pcbShape->DefineSection(1, pcbThick/2); | |
268 | TGeoVolume* pcbVolume = new TGeoVolume(Form(fgkPCBName, id, 'B'), | |
269 | pcbShape, fPCB); | |
270 | ||
271 | // Short leg shape | |
272 | TGeoTube* shortLegShape = new TGeoTube(0, legr, legl / 2); | |
273 | TGeoVolume* shortLegVolume = new TGeoVolume(Form(fgkShortLegName, id), | |
274 | shortLegShape, fPlastic); | |
275 | ||
276 | // Long leg shape | |
277 | TGeoTube* longLegShape = new TGeoTube(0, legr, (legl + modSpace) / 2); | |
278 | TGeoVolume* longLegVolume = new TGeoVolume(Form(fgkLongLegName, id), | |
279 | longLegShape, fPlastic); | |
280 | ||
281 | TGeoMatrix* matrix = 0; | |
282 | // Back container volume | |
283 | Double_t contThick = siThick + pcbThick + legl; | |
284 | TGeoTubeSeg* backShape = new TGeoTubeSeg(rmin, rmax, contThick/2, | |
285 | - theta, theta); | |
286 | TGeoVolume* backVolume = new TGeoVolume(Form(fgkBackVName, id), | |
287 | backShape, fAir); | |
288 | Double_t x = 0; | |
289 | Double_t y = 0; | |
290 | Double_t z = -contThick / 2 + siThick / 2; | |
291 | matrix = new TGeoTranslation(Form("FMD Ring %c mod 1 transform", id), | |
292 | x, y, z); | |
293 | backVolume->AddNode(moduleVolume, 0, matrix); | |
294 | z += siThick / 2 + pcbThick / 2; | |
295 | matrix = new TGeoTranslation(Form("FMD Ring %c pcb 1 transfrom", id), | |
296 | x, y, z); | |
297 | backVolume->AddNode(pcbVolume, 0, matrix); | |
298 | x = a->X() + legoff + legr; | |
299 | y = 0; | |
300 | z += pcbThick / 2 + legl / 2; | |
301 | matrix = new TGeoTranslation(Form("FMD Ring %c leg 1 transfrom", id), | |
302 | x, y, z); | |
303 | backVolume->AddNode(shortLegVolume, 0, matrix); | |
304 | x = c->X(); | |
305 | y = c->Y() - legoff - legr - off; | |
306 | matrix = new TGeoTranslation(Form("FMD Ring %c leg 2 transfrom", id), | |
307 | x, y, z); | |
308 | backVolume->AddNode(shortLegVolume, 1, matrix); | |
309 | y = -y; | |
310 | matrix = new TGeoTranslation(Form("FMD Ring %c leg 3 transfrom", id), | |
311 | x, y, z); | |
312 | backVolume->AddNode(shortLegVolume, 2, matrix); | |
313 | // backVolume->SetVisibility(kFALSE); | |
314 | // backVolume->VisibleDaughters(kTRUE); | |
315 | ||
316 | // Front container volume | |
317 | contThick += modSpace; | |
318 | TGeoTubeSeg* frontShape = new TGeoTubeSeg(rmin, rmax, contThick/2, | |
319 | -theta, theta); | |
320 | TGeoVolume* frontVolume = new TGeoVolume(Form(fgkFrontVName, id), | |
321 | frontShape, fAir); | |
322 | x = 0; | |
323 | y = 0; | |
324 | z = -contThick / 2 + siThick / 2 ; | |
325 | matrix = new TGeoTranslation(Form("FMD Ring %c mod 2 transfrom", id), | |
326 | 0, 0, z); | |
327 | frontVolume->AddNode(moduleVolume, 1, matrix); | |
328 | z += siThick / 2 + pcbThick / 2; | |
329 | matrix = new TGeoTranslation(Form("FMD Ring %c pcb 2 transfrom", id), | |
330 | x, y, z); | |
331 | frontVolume->AddNode(pcbVolume, 1, matrix); | |
332 | x = a->X() + legoff + legr; | |
333 | y = 0; | |
334 | z += pcbThick / 2 + (legl + modSpace)/ 2; | |
335 | matrix = new TGeoTranslation(Form("FMD Ring %c leg 4 transfrom", id), | |
336 | x, y, z); | |
337 | frontVolume->AddNode(longLegVolume, 0, matrix); | |
338 | x = c->X(); | |
339 | y = c->Y() - legoff - legr - off; | |
340 | matrix = new TGeoTranslation(Form("FMD Ring %c leg 4 transfrom", id), | |
341 | x, y, z); | |
342 | frontVolume->AddNode(longLegVolume, 1, matrix); | |
343 | y = -y; | |
344 | matrix = new TGeoTranslation(Form("FMD Ring %c leg 4 transfrom", id), | |
345 | x, y, z); | |
346 | frontVolume->AddNode(longLegVolume, 2, matrix); | |
347 | // frontVolume->SetVisibility(kFALSE); | |
348 | // frontVolume->VisibleDaughters(kTRUE); | |
349 | ||
350 | // Ring mother volume | |
351 | TGeoTube* ringShape = new TGeoTube(rmin, rmax, contThick / 2); | |
352 | TGeoVolume* ringVolume = new TGeoVolume(Form(fgkRingName, id), ringShape, | |
353 | fAir); | |
354 | ||
355 | Int_t nmod = r->GetNModules(); | |
356 | AliDebug(10, Form("making %d modules in ring %c", nmod, id)); | |
357 | for (Int_t i = 0; i < nmod; i++) { | |
358 | Bool_t isFront = (i % 2 == 0); | |
359 | TGeoVolume* vol = (isFront ? frontVolume : backVolume); | |
360 | TGeoRotation* rot = new TGeoRotation(Form("FMD Ring %c rotation %d",id,i)); | |
361 | rot->RotateZ((i + .5) * 2 * theta); | |
362 | Double_t z = (isFront ? 0 : modSpace) / 2; | |
363 | matrix = new TGeoCombiTrans(Form("FMD Ring %c transform %d", id, i), | |
364 | 0, 0, z, rot); | |
365 | ringVolume->AddNode(vol, i, matrix); | |
366 | } | |
367 | ||
368 | ringVolume->SetVisibility(kFALSE); | |
369 | ringVolume->VisibleDaughters(kTRUE); | |
370 | return ringVolume; | |
371 | } | |
372 | ||
373 | //____________________________________________________________________ | |
374 | TGeoVolume* | |
375 | AliFMDGeoSimulator::DetectorGeometry(AliFMDDetector* d, | |
376 | TGeoVolume* mother, | |
377 | Double_t zmother, | |
378 | TGeoVolume* inner, | |
379 | TGeoVolume* outer) | |
380 | { | |
381 | // Common stuff for setting up the FMD1, FMD2, and FMD3 geometries. | |
382 | // This includes putting the Honeycomb support plates and the rings | |
383 | // into the mother volumes. | |
384 | // | |
385 | // Parameeters: | |
386 | // d The detector geometry to use | |
387 | // mother The mother volume of the detector | |
388 | // zmother The midpoint in global coordinates of detector vol. | |
389 | // inner Pointer to inner ring volume | |
390 | // outer Pointer to outer ring volume | |
391 | // | |
392 | // Returns: | |
393 | // Pointer to mother (detector volume) | |
394 | // | |
395 | if (!d) return 0; | |
396 | // Loop over the defined rings | |
397 | for (int i = 0; i < 2; i++) { | |
398 | AliFMDRing* r = 0; | |
399 | Double_t lowr = 0; | |
400 | Double_t highr = 0; | |
401 | Double_t rz = 0; | |
402 | TGeoVolume* rvol = 0; | |
403 | switch (i) { | |
404 | case 0: | |
405 | r = d->GetInner(); | |
406 | lowr = d->GetInnerHoneyLowR(); | |
407 | highr = d->GetInnerHoneyHighR(); | |
408 | rz = d->GetInnerZ(); | |
409 | rvol = inner; | |
410 | break; | |
411 | case 1: | |
412 | r = d->GetOuter(); | |
413 | lowr = d->GetOuterHoneyLowR(); | |
414 | highr = d->GetOuterHoneyHighR(); | |
415 | rz = d->GetOuterZ(); | |
416 | rvol = outer; | |
417 | break; | |
418 | } | |
419 | if (!r) continue; | |
420 | Char_t c = r->GetId(); | |
421 | Int_t id = d->GetId(); | |
422 | Double_t hcThick = d->GetHoneycombThickness(); | |
423 | Double_t alThick = d->GetAlThickness(); | |
424 | Double_t z; | |
425 | if (zmother > 0) z = rz - zmother + r->GetRingDepth() / 2; | |
426 | else z = zmother - rz + r->GetRingDepth() / 2; | |
427 | // Place ring in mother volume | |
428 | mother->AddNode(rvol, Int_t(c), | |
429 | new TGeoTranslation(Form("FMD%d%c transform", id, c), | |
430 | 0, 0, z)); | |
431 | ||
432 | z += r->GetRingDepth() / 2 + hcThick / 2; | |
433 | // Top of Honeycomb | |
434 | TGeoTubeSeg* topHCShape = new TGeoTubeSeg(lowr, highr, hcThick/2, 0, 180); | |
435 | TGeoVolume* topHCVolume = new TGeoVolume(Form(fgkTopHCName, id, c), | |
436 | topHCShape, fAl); | |
437 | TGeoMatrix* topHCMatrix = | |
438 | new TGeoTranslation(Form("FMD%d%c top HC transform", id, c), 0, 0, z); | |
439 | mother->AddNode(topHCVolume, 0, topHCMatrix); | |
440 | ||
441 | // Air in top of honeycomb | |
442 | TGeoTubeSeg* topIHCShape = new TGeoTubeSeg(lowr+alThick, highr - alThick, | |
443 | (hcThick-alThick)/2, 0, 180); | |
444 | TGeoVolume* topIHCVolume = new TGeoVolume(Form(fgkTopIHCName, id, c), | |
445 | topIHCShape, fAir); | |
446 | topHCVolume->AddNode(topIHCVolume, 0); | |
447 | topHCVolume->VisibleDaughters(kFALSE); | |
448 | topHCVolume->SetVisibility(kTRUE); | |
449 | ||
450 | ||
451 | // Bottom of Honeycomb | |
452 | TGeoTubeSeg* botHCShape = new TGeoTubeSeg(lowr, highr, hcThick/2, | |
453 | 180, 360); | |
454 | TGeoVolume* botHCVolume = new TGeoVolume(Form(fgkBotHCName, id, c), | |
455 | botHCShape, fAl); | |
456 | TGeoMatrix* botHCMatrix = | |
457 | new TGeoTranslation(Form("FMD%d%c bottom HC transform", id, c), 0, 0, z); | |
458 | mother->AddNode(botHCVolume, 0, botHCMatrix); | |
459 | ||
460 | // Air in bot of honeycomb | |
461 | TGeoTubeSeg* botIHCShape = new TGeoTubeSeg(lowr+alThick, highr - alThick, | |
462 | (hcThick-alThick)/2, 180, 360); | |
463 | TGeoVolume* botIHCVolume = new TGeoVolume(Form(fgkBotIHCName, id, c), | |
464 | botIHCShape, fAir); | |
465 | botHCVolume->AddNode(botIHCVolume, 0); | |
466 | botHCVolume->VisibleDaughters(kFALSE); | |
467 | botHCVolume->SetVisibility(kTRUE); | |
468 | } | |
469 | mother->SetVisibility(kFALSE); | |
470 | mother->VisibleDaughters(kTRUE); | |
471 | return mother; | |
472 | } | |
473 | ||
474 | //____________________________________________________________________ | |
475 | TGeoVolume* | |
476 | AliFMDGeoSimulator::FMD1Geometry(AliFMD1* fmd1, TGeoVolume* inner) | |
477 | { | |
478 | // Setup the FMD1 geometry. The FMD1 only has one ring, and no | |
479 | // special support as it is at the momement. | |
480 | // | |
481 | // See also AliFMDGeoSimulator::DetectorGeometry | |
482 | // | |
483 | if (!fmd1 || !inner) return 0; | |
484 | Double_t rmin = fmd1->GetInner()->GetLowR(); | |
485 | Double_t rmax = fmd1->GetInnerHoneyHighR(); | |
486 | Double_t hcThick = fmd1->GetHoneycombThickness(); | |
487 | Double_t w = fmd1->GetInner()->GetRingDepth() + hcThick; | |
488 | Double_t z = fmd1->GetInnerZ() + w / 2; | |
489 | ||
490 | TGeoTube* fmd1Shape = new TGeoTube(rmin, rmax, w / 2); | |
491 | TGeoVolume* fmd1Volume = new TGeoVolume(fmd1->GetName(), fmd1Shape, fAir); | |
492 | ||
493 | TGeoVolume* top = gGeoManager->GetVolume("ALIC"); | |
494 | TGeoMatrix* matrix = new TGeoTranslation("FMD1 transform", 0, 0, z); | |
495 | top->AddNode(fmd1Volume, fmd1->GetId(), matrix); | |
496 | ||
497 | return DetectorGeometry(fmd1, fmd1Volume, z, inner, 0); | |
498 | } | |
499 | ||
500 | //____________________________________________________________________ | |
501 | TGeoVolume* | |
502 | AliFMDGeoSimulator::FMD2Geometry(AliFMD2* fmd2, | |
503 | TGeoVolume* inner, | |
504 | TGeoVolume* outer) | |
505 | { | |
506 | // Setup the FMD2 geometry. The FMD2 has no | |
507 | // special support as it is at the momement. | |
508 | // | |
509 | // See also AliFMDGeoSimulator::DetectorGeometry | |
510 | // | |
511 | if (!fmd2 || !inner || !outer) return 0; | |
512 | Double_t rmin = fmd2->GetInner()->GetLowR(); | |
513 | Double_t rmax = fmd2->GetOuterHoneyHighR(); | |
514 | Double_t hcThick = fmd2->GetHoneycombThickness(); | |
515 | Double_t ow = fmd2->GetInner()->GetRingDepth(); | |
516 | Double_t iz = fmd2->GetInnerZ(); | |
517 | Double_t oz = fmd2->GetOuterZ(); | |
518 | Double_t w = TMath::Abs(oz - iz) + ow + hcThick; | |
519 | Double_t z = oz + w / 2; | |
520 | ||
521 | TGeoTube* fmd2Shape = new TGeoTube(rmin, rmax, w / 2); | |
522 | TGeoVolume* fmd2Volume = new TGeoVolume(fmd2->GetName(), fmd2Shape, fAir); | |
523 | ||
524 | TGeoVolume* top = gGeoManager->GetVolume("ALIC"); | |
525 | TGeoMatrix* matrix = new TGeoTranslation("FMD2 transform", 0, 0, z); | |
526 | top->AddNode(fmd2Volume, fmd2->GetId(), matrix); | |
527 | ||
528 | return DetectorGeometry(fmd2, fmd2Volume, z, inner, outer); | |
529 | } | |
530 | ||
531 | //____________________________________________________________________ | |
532 | TGeoVolume* | |
533 | AliFMDGeoSimulator::FMD3Geometry(AliFMD3* fmd3, | |
534 | TGeoVolume* inner, | |
535 | TGeoVolume* outer) | |
536 | { | |
537 | // Setup the FMD3 geometry. The FMD2 has a rather elaborate support | |
538 | // structure, as the support will also support the vacuum | |
539 | // beam-pipe. | |
540 | // | |
541 | // See also AliFMDGeoSimulator::DetectorGeometry | |
542 | // | |
543 | if (!fmd3 || !inner || !outer) return 0; | |
544 | Double_t nlen = fmd3->GetNoseLength(); | |
545 | Double_t nz = fmd3->GetNoseZ(); | |
546 | Double_t noser1 = fmd3->GetNoseLowR(); | |
547 | Double_t noser2 = fmd3->GetNoseHighR(); | |
548 | Double_t conel = fmd3->GetConeLength(); | |
549 | Double_t backl = fmd3->GetBackLength(); | |
550 | Double_t backr1 = fmd3->GetBackLowR(); | |
551 | Double_t backr2 = fmd3->GetBackHighR(); | |
552 | Double_t zdist = conel - backl - nlen; | |
553 | Double_t tdist = backr2 - noser2; | |
554 | Double_t beaml = TMath::Sqrt(zdist * zdist + tdist * tdist); | |
555 | Double_t theta = -180. * TMath::ATan2(tdist, zdist) / TMath::Pi(); | |
556 | Double_t innerZ = fmd3->GetInnerZ(); | |
557 | Double_t innerZh = (innerZ - fmd3->GetInner()->GetRingDepth() | |
558 | - fmd3->GetHoneycombThickness()); | |
559 | Double_t outerZ = fmd3->GetOuterZ(); | |
560 | Double_t outerZh = (outerZ - fmd3->GetOuter()->GetRingDepth() | |
561 | - fmd3->GetHoneycombThickness()); | |
562 | Double_t innerr1 = fmd3->GetInner()->GetLowR(); | |
563 | // Double_t innerr2 = fmd3->GetInner()->GetHighR(); | |
564 | Double_t outerr1 = fmd3->GetOuter()->GetLowR(); | |
565 | // Double_t outerr2 = fmd3->GetOuter()->GetHighR(); | |
566 | Double_t flanger = fmd3->GetFlangeR(); | |
567 | Double_t minZ = TMath::Min(nz - conel, outerZh); | |
568 | Double_t z = fmd3->GetZ(); | |
569 | Double_t zi; | |
570 | ||
571 | // FMD3 volume | |
572 | TGeoPcon* fmd3Shape = new TGeoPcon(0, 360, 8); | |
573 | zi = z - nz; | |
574 | fmd3Shape->DefineSection(0, zi, noser1, noser2); | |
575 | zi = z - (nz - nlen); | |
576 | fmd3Shape->DefineSection(1, zi, noser1, fmd3->ConeR(z - zi)+.15); | |
577 | zi = z - innerZ; | |
578 | fmd3Shape->DefineSection(2, zi, innerr1, fmd3->ConeR(z - zi)+.15); | |
579 | zi = z - innerZh; | |
580 | fmd3Shape->DefineSection(3, zi, innerr1, fmd3->ConeR(z - zi)+.15); | |
581 | fmd3Shape->DefineSection(4, zi, outerr1, fmd3->ConeR(z - zi)+.15); | |
582 | zi = z - nz + zdist + nlen; | |
583 | fmd3Shape->DefineSection(5, zi, outerr1, fmd3->ConeR(z - zi)+.15); | |
584 | zi = z - nz + nlen + zdist; | |
585 | fmd3Shape->DefineSection(6, zi, outerr1, flanger+1.5); | |
586 | zi = z - minZ; | |
587 | fmd3Shape->DefineSection(7, zi, outerr1, flanger+1.5); | |
588 | TGeoVolume* fmd3Volume = new TGeoVolume(fmd3->GetName(), fmd3Shape, fAir); | |
589 | ||
590 | TGeoRotation* rot = new TGeoRotation("FMD3 rotatation"); | |
591 | rot->RotateY(180); | |
592 | TGeoVolume* top = gGeoManager->GetVolume("ALIC"); | |
593 | TGeoMatrix* mmatrix = new TGeoCombiTrans("FMD3 transform", 0, 0, z, rot); | |
594 | top->AddNode(fmd3Volume, fmd3->GetId(), mmatrix); | |
595 | ||
596 | // Nose volume | |
597 | TGeoTube* noseShape = new TGeoTube(noser1, noser2, nlen / 2); | |
598 | TGeoVolume* noseVolume = new TGeoVolume(fgkNoseName, noseShape, fC); | |
599 | zi = z - nz + nlen / 2; | |
600 | TGeoMatrix* nmatrix = new TGeoTranslation("FMD3 Nose translation", 0, 0, zi); | |
601 | fmd3Volume->AddNodeOverlap(noseVolume, 0, nmatrix); | |
602 | ||
603 | // Back | |
604 | TGeoTube* backShape = new TGeoTube(backr1, backr2, backl / 2); | |
605 | TGeoVolume* backVolume = new TGeoVolume(fgkBackName, backShape, fC); | |
606 | zi = z - nz + conel - backl / 2; | |
607 | TGeoMatrix* bmatrix = new TGeoTranslation("FMD3 Back translation", 0, 0, zi); | |
608 | fmd3Volume->AddNode(backVolume, 0, bmatrix); | |
609 | ||
610 | Int_t n; | |
611 | Double_t r; | |
612 | // The flanges | |
613 | TGeoBBox* flangeShape = new TGeoBBox((flanger - backr2) / 2, | |
614 | fmd3->GetBeamWidth() / 2, | |
615 | backl / 2); | |
616 | TGeoVolume* flangeVolume = new TGeoVolume(fgkFlangeName, flangeShape, fC); | |
617 | n = fmd3->GetNFlange(); | |
618 | r = backr2 + (flanger - backr2) / 2; | |
619 | for (Int_t i = 0; i < n; i++) { | |
620 | Double_t phi = 360. / n * i + 180. / n; | |
621 | Double_t x = r * TMath::Cos(TMath::Pi() / 180 * phi); | |
622 | Double_t y = r * TMath::Sin(TMath::Pi() / 180 * phi); | |
623 | TGeoRotation* rot = new TGeoRotation(Form("FMD3 Flange rotation %d", i)); | |
624 | rot->RotateZ(phi); | |
625 | TGeoMatrix* matrix = new TGeoCombiTrans(Form("FMD3 flange transform %d", | |
626 | i), x, y, zi, rot); | |
627 | fmd3Volume->AddNodeOverlap(flangeVolume, i, matrix); | |
628 | ||
629 | } | |
630 | ||
631 | // The Beams | |
632 | TGeoBBox* beamShape = new TGeoBBox(fmd3->GetBeamThickness() / 2, | |
633 | fmd3->GetBeamWidth() / 2, | |
634 | beaml / 2); | |
635 | TGeoVolume* beamVolume = new TGeoVolume(fgkBeamName, beamShape, fC); | |
636 | n = fmd3->GetNBeam(); | |
637 | r = noser2 + tdist / 2; | |
638 | zi = z - nz + nlen + zdist / 2; | |
639 | for (Int_t i = 0; i < n; i++) { | |
640 | Double_t phi = 360. / n * i; | |
641 | Double_t x = r * TMath::Cos(TMath::Pi() / 180 * phi); | |
642 | Double_t y = r * TMath::Sin(TMath::Pi() / 180 * phi); | |
643 | TGeoRotation* rot = new TGeoRotation(Form("FMD3 beam rotation %d", i)); | |
644 | rot->RotateZ(phi); | |
645 | rot->RotateY(-theta); | |
646 | TGeoMatrix* matrix = new TGeoCombiTrans(Form("FMD3 beam transform %d", i), | |
647 | x, y, zi, rot); | |
648 | fmd3Volume->AddNode(beamVolume, i, matrix); | |
649 | } | |
650 | ||
651 | ||
652 | return DetectorGeometry(fmd3, fmd3Volume, z, inner, outer); | |
653 | } | |
654 | ||
655 | //____________________________________________________________________ | |
656 | void | |
657 | AliFMDGeoSimulator::DefineGeometry() | |
658 | { | |
659 | // Setup up the FMD geometry. | |
660 | AliDebug(10, "Setting up volume"); | |
661 | ||
662 | AliFMDGeometry* fmd = AliFMDGeometry::Instance(); | |
663 | TGeoVolume* inner = RingGeometry(fmd->GetInner()); | |
664 | TGeoVolume* outer = RingGeometry(fmd->GetOuter()); | |
665 | ||
666 | if (!inner || !outer) { | |
667 | AliError("Failed to create one of the ring volumes"); | |
668 | return; | |
669 | } | |
670 | FMD1Geometry(fmd->GetFMD1(), inner); | |
671 | FMD2Geometry(fmd->GetFMD2(), inner, outer); | |
672 | FMD3Geometry(fmd->GetFMD3(), inner, outer); | |
673 | } | |
674 | ||
675 | ||
676 | //____________________________________________________________________ | |
677 | // | |
678 | // EOF | |
679 | // |