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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 | // Geometry class for PHOS : singleton | |
20 | // The EMC modules are parametrized so that any configuration can be easily implemented | |
21 | // The title is used to identify the type of CPV used. So far only PPSD implemented | |
22 | // | |
23 | //*-- Author: Yves Schutz (SUBATECH) | |
24 | ||
25 | // --- ROOT system --- | |
26 | ||
27 | #include "TVector3.h" | |
28 | #include "TRotation.h" | |
29 | ||
30 | // --- Standard library --- | |
31 | ||
32 | #include <iostream> | |
33 | ||
34 | // --- AliRoot header files --- | |
35 | ||
36 | #include "AliPHOSGeometry.h" | |
37 | #include "AliPHOSPpsdRecPoint.h" | |
38 | #include "AliConst.h" | |
39 | ||
40 | ClassImp(AliPHOSGeometry) | |
41 | ||
42 | AliPHOSGeometry * AliPHOSGeometry::fGeom = 0 ; | |
43 | ||
44 | //____________________________________________________________________________ | |
45 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
46 | { | |
47 | // dtor | |
48 | ||
49 | fRotMatrixArray->Delete() ; | |
50 | delete fRotMatrixArray ; | |
51 | } | |
52 | ||
53 | //____________________________________________________________________________ | |
54 | Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid) | |
55 | { | |
56 | // Converts the absolute numbering into the following array/ | |
57 | // relid[0] = PHOS Module number 1:fNModules | |
58 | // relid[1] = 0 if PbW04 | |
59 | // = PPSD Module number 1:fNumberOfModulesPhi*fNumberOfModulesZ*2 (2->up and bottom level) | |
60 | // relid[2] = Row number inside a PHOS or PPSD module | |
61 | // relid[3] = Column number inside a PHOS or PPSD module | |
62 | ||
63 | Bool_t rv = kTRUE ; | |
64 | Float_t id = AbsId ; | |
65 | ||
66 | Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / ( GetNPhi() * GetNZ() ) ) ; | |
67 | ||
68 | if ( phosmodulenumber > GetNModules() ) { // its a PPSD pad | |
69 | ||
70 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
71 | Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
72 | relid[0] = (Int_t)TMath::Ceil( id / tempo ) ; | |
73 | id -= ( relid[0] - 1 ) * tempo ; | |
74 | relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ; | |
75 | id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
76 | relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ; | |
77 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ; | |
78 | } | |
79 | else { // its a PW04 crystal | |
80 | ||
81 | relid[0] = phosmodulenumber ; | |
82 | relid[1] = 0 ; | |
83 | id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ; | |
84 | relid[2] = (Int_t)TMath::Ceil( id / GetNPhi() ) ; | |
85 | relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNPhi() ) ; | |
86 | } | |
87 | return rv ; | |
88 | } | |
89 | //____________________________________________________________________________ | |
90 | void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) | |
91 | { | |
92 | // calculates the angular coverage in theta and phi of a EMC module | |
93 | ||
94 | Double_t conv ; | |
95 | if ( opt == kRadian ) | |
96 | conv = 1. ; | |
97 | else if ( opt == kDegre ) | |
98 | conv = 180. / TMath::Pi() ; | |
99 | else { | |
100 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
101 | conv = 1. ; | |
102 | } | |
103 | ||
104 | Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; | |
105 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
106 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; | |
107 | ||
108 | Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ; | |
109 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.) | |
110 | Double_t max = phi - angle ; | |
111 | Double_t min = phi + angle ; | |
112 | pM = TMath::Max(max, min) * conv ; | |
113 | pm = TMath::Min(max, min) * conv ; | |
114 | ||
115 | angle = TMath::ATan( GetCrystalSize(2)*GetNZ() / (2 * y0) ) ; | |
116 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) | |
117 | min = TMath::Pi() / 2. - angle ; | |
118 | tM = TMath::Max(max, min) * conv ; | |
119 | tm = TMath::Min(max, min) * conv ; | |
120 | ||
121 | } | |
122 | ||
123 | //____________________________________________________________________________ | |
124 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) | |
125 | { | |
126 | // calculates the angular coverage in theta and phi of a single crystal in a EMC module | |
127 | ||
128 | Double_t conv ; | |
129 | if ( opt == kRadian ) | |
130 | conv = 1. ; | |
131 | else if ( opt == kDegre ) | |
132 | conv = 180. / TMath::Pi() ; | |
133 | else { | |
134 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
135 | conv = 1. ; | |
136 | } | |
137 | ||
138 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
139 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; | |
140 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; | |
141 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
142 | } | |
143 | ||
144 | ||
145 | //____________________________________________________________________________ | |
146 | void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x) | |
147 | { | |
148 | // calculates the impact coordinates of a neutral particle | |
149 | // emitted in direction theta and phi in ALICE | |
150 | ||
151 | // searches for the PHOS EMC module | |
152 | ModuleNumber = 0 ; | |
153 | Double_t tm, tM, pm, pM ; | |
154 | Int_t index = 1 ; | |
155 | while ( ModuleNumber == 0 && index <= GetNModules() ) { | |
156 | EmcModuleCoverage(index, tm, tM, pm, pM) ; | |
157 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) | |
158 | ModuleNumber = index ; | |
159 | index++ ; | |
160 | } | |
161 | if ( ModuleNumber != 0 ) { | |
162 | Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
163 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
164 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; | |
165 | Double_t angle = phi - phi0; | |
166 | x = y0 * TMath::Tan(angle) ; | |
167 | angle = theta - TMath::Pi() / 2 ; | |
168 | z = y0 * TMath::Tan(angle) ; | |
169 | } | |
170 | } | |
171 | ||
172 | //____________________________________________________________________________ | |
173 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) | |
174 | { | |
175 | // Calculates the ALICE global coordinates of a RecPoint and the error matrix | |
176 | ||
177 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; | |
178 | TVector3 localposition ; | |
179 | ||
180 | tmpPHOS->GetLocalPosition(gpos) ; | |
181 | ||
182 | ||
183 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
184 | { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() + | |
185 | GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ; | |
186 | ||
187 | } | |
188 | else | |
189 | { // it is a PPSD pad | |
190 | AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ; | |
191 | if (tmpPpsd->GetUp() ) // it is an upper module | |
192 | { | |
193 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - | |
194 | GetLeadToMicro2Gap() - GetLeadConverterThickness() - | |
195 | GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ; | |
196 | } | |
197 | else // it is a lower module | |
198 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ; | |
199 | } | |
200 | ||
201 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; | |
202 | Double_t const kRADDEG = 180.0 / kPI ; | |
203 | Float_t rphi = phi / kRADDEG ; | |
204 | ||
205 | TRotation rot ; | |
206 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
207 | ||
208 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
209 | gpos.Transform(rot) ; // rotate the baby | |
210 | ||
211 | } | |
212 | ||
213 | //____________________________________________________________________________ | |
214 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) | |
215 | { | |
216 | // Calculates the ALICE global coordinates of a RecPoint | |
217 | ||
218 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; | |
219 | TVector3 localposition ; | |
220 | tmpPHOS->GetLocalPosition(gpos) ; | |
221 | ||
222 | ||
223 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
224 | { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() + | |
225 | GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ; | |
226 | } | |
227 | else | |
228 | { // it is a PPSD pad | |
229 | AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ; | |
230 | if (tmpPpsd->GetUp() ) // it is an upper module | |
231 | { | |
232 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - | |
233 | GetLeadToMicro2Gap() - GetLeadConverterThickness() - | |
234 | GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ; | |
235 | } | |
236 | else // it is a lower module | |
237 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ; | |
238 | } | |
239 | ||
240 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; | |
241 | Double_t const kRADDEG = 180.0 / kPI ; | |
242 | Float_t rphi = phi / kRADDEG ; | |
243 | ||
244 | TRotation rot ; | |
245 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
246 | ||
247 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
248 | gpos.Transform(rot) ; // rotate the baby | |
249 | } | |
250 | ||
251 | //____________________________________________________________________________ | |
252 | void AliPHOSGeometry::Init(void) | |
253 | { | |
254 | // Initializes the PHOS parameters | |
255 | ||
256 | fRotMatrixArray = new TObjArray(fNModules) ; | |
257 | ||
258 | cout << "PHOS geometry setup: parameters for option " << fName << " " << fTitle << endl ; | |
259 | if ( ((strcmp( fName, "default" )) == 0) || ((strcmp( fName, "GPS2" )) == 0) ) { | |
260 | fInit = kTRUE ; | |
261 | this->InitPHOS() ; | |
262 | this->InitPPSD() ; | |
263 | this->SetPHOSAngles() ; | |
264 | } | |
265 | else { | |
266 | fInit = kFALSE ; | |
267 | cout << "PHOS Geometry setup: option not defined " << fName << endl ; | |
268 | } | |
269 | } | |
270 | ||
271 | //____________________________________________________________________________ | |
272 | void AliPHOSGeometry::InitPHOS(void) | |
273 | { | |
274 | // Initializes the EMC parameters | |
275 | ||
276 | fNPhi = 64 ; | |
277 | fNZ = 64 ; | |
278 | fNModules = 5 ; | |
279 | ||
280 | fPHOSAngle[0] = 0.0 ; // Module position angles are set in CreateGeometry() | |
281 | fPHOSAngle[1] = 0.0 ; | |
282 | fPHOSAngle[2] = 0.0 ; | |
283 | fPHOSAngle[3] = 0.0 ; | |
284 | ||
285 | fXtlSize[0] = 2.2 ; | |
286 | fXtlSize[1] = 18.0 ; | |
287 | fXtlSize[2] = 2.2 ; | |
288 | ||
289 | // all these numbers coming next are subject to changes | |
290 | ||
291 | fOuterBoxThickness[0] = 2.8 ; | |
292 | fOuterBoxThickness[1] = 5.0 ; | |
293 | fOuterBoxThickness[2] = 5.0 ; | |
294 | ||
295 | fUpperPlateThickness = 4.0 ; | |
296 | ||
297 | fSecondUpperPlateThickness = 5.0 ; | |
298 | ||
299 | fCrystalSupportHeight = 6.95 ; | |
300 | fCrystalWrapThickness = 0.01 ; | |
301 | fCrystalHolderThickness = 0.005 ; | |
302 | fModuleBoxThickness = 2.0 ; | |
303 | fIPtoOuterCoverDistance = 447.0 ; | |
304 | fIPtoCrystalSurface = 460.0 ; | |
305 | ||
306 | fPinDiodeSize[0] = 1.71 ; //Values given by Odd Harald feb 2000 | |
307 | fPinDiodeSize[1] = 0.0280 ; // 0.0280 is the depth of active layer in the silicon | |
308 | fPinDiodeSize[2] = 1.61 ; | |
309 | ||
310 | fUpperCoolingPlateThickness = 0.06 ; | |
311 | fSupportPlateThickness = 10.0 ; | |
312 | fLowerThermoPlateThickness = 3.0 ; | |
313 | fLowerTextolitPlateThickness = 1.0 ; | |
314 | fGapBetweenCrystals = 0.03 ; | |
315 | ||
316 | fTextolitBoxThickness[0] = 1.5 ; | |
317 | fTextolitBoxThickness[1] = 0.0 ; | |
318 | fTextolitBoxThickness[2] = 3.0 ; | |
319 | ||
320 | fAirThickness[0] = 1.56 ; | |
321 | fAirThickness[1] = 20.5175 ; | |
322 | fAirThickness[2] = 2.48 ; | |
323 | ||
324 | Float_t xtalModulePhiSize = fNPhi * ( fXtlSize[0] + 2 * fGapBetweenCrystals ) ; | |
325 | Float_t xtalModuleZSize = fNZ * ( fXtlSize[2] + 2 * fGapBetweenCrystals ) ; | |
326 | ||
327 | // The next dimensions are calculated from the above parameters | |
328 | ||
329 | fOuterBoxSize[0] = xtalModulePhiSize + 2 * ( fAirThickness[0] + fModuleBoxThickness | |
330 | + fTextolitBoxThickness[0] + fOuterBoxThickness[0] ) ; | |
331 | fOuterBoxSize[1] = ( fXtlSize[1] + fCrystalSupportHeight + fCrystalWrapThickness + fCrystalHolderThickness ) | |
332 | + 2 * (fAirThickness[1] + fModuleBoxThickness + fTextolitBoxThickness[1] + fOuterBoxThickness[1] ) ; | |
333 | fOuterBoxSize[2] = xtalModuleZSize + 2 * ( fAirThickness[2] + fModuleBoxThickness | |
334 | + fTextolitBoxThickness[2] + fOuterBoxThickness[2] ) ; | |
335 | ||
336 | fTextolitBoxSize[0] = fOuterBoxSize[0] - 2 * fOuterBoxThickness[0] ; | |
337 | fTextolitBoxSize[1] = fOuterBoxSize[1] - fOuterBoxThickness[1] - fUpperPlateThickness ; | |
338 | fTextolitBoxSize[2] = fOuterBoxSize[2] - 2 * fOuterBoxThickness[2] ; | |
339 | ||
340 | fAirFilledBoxSize[0] = fTextolitBoxSize[0] - 2 * fTextolitBoxThickness[0] ; | |
341 | fAirFilledBoxSize[1] = fTextolitBoxSize[1] - fSecondUpperPlateThickness ; | |
342 | fAirFilledBoxSize[2] = fTextolitBoxSize[2] - 2 * fTextolitBoxThickness[2] ; | |
343 | ||
344 | } | |
345 | ||
346 | //____________________________________________________________________________ | |
347 | void AliPHOSGeometry::InitPPSD(void) | |
348 | { | |
349 | // Initializes the PPSD parameters | |
350 | ||
351 | fAnodeThickness = 0.0009 ; | |
352 | fAvalancheGap = 0.01 ; | |
353 | fCathodeThickness = 0.0009 ; | |
354 | fCompositeThickness = 0.3 ; | |
355 | fConversionGap = 0.6 ; | |
356 | fLeadConverterThickness = 0.56 ; | |
357 | fLeadToMicro2Gap = 0.1 ; | |
358 | fLidThickness = 0.2 ; | |
359 | fMicro1ToLeadGap = 0.1 ; | |
360 | fMicromegasWallThickness = 0.6 ; | |
361 | fNumberOfModulesPhi = 4 ; | |
362 | fNumberOfModulesZ = 4 ; | |
363 | fNumberOfPadsPhi = 24 ; | |
364 | fNumberOfPadsZ = 24 ; | |
365 | fPCThickness = 0.1 ; | |
366 | fPhiDisplacement = 0.8 ; | |
367 | fZDisplacement = 0.8 ; | |
368 | ||
369 | fMicromegas1Thickness = fLidThickness + 2 * fCompositeThickness + fCathodeThickness + fPCThickness | |
370 | + fAnodeThickness + fConversionGap + fAvalancheGap ; | |
371 | fMicromegas2Thickness = fMicromegas1Thickness ; | |
372 | ||
373 | ||
374 | fPPSDModuleSize[0] = 38.0 ; | |
375 | fPPSDModuleSize[1] = fMicromegas1Thickness ; | |
376 | fPPSDModuleSize[2] = 38.0 ; | |
377 | ||
378 | fPPSDBoxSize[0] = fNumberOfModulesPhi * fPPSDModuleSize[0] + 2 * fPhiDisplacement ; | |
379 | fPPSDBoxSize[1] = fMicromegas2Thickness + fMicromegas2Thickness + fLeadConverterThickness + fMicro1ToLeadGap + fLeadToMicro2Gap ; | |
380 | fPPSDBoxSize[2] = fNumberOfModulesZ * fPPSDModuleSize[2] + 2 * fZDisplacement ; | |
381 | ||
382 | fIPtoTopLidDistance = fIPtoOuterCoverDistance - fPPSDBoxSize[1] - 1. ; | |
383 | ||
384 | } | |
385 | ||
386 | //____________________________________________________________________________ | |
387 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
388 | { | |
389 | // Returns the pointer of the unique instance | |
390 | ||
391 | return (AliPHOSGeometry *) fGeom ; | |
392 | } | |
393 | ||
394 | //____________________________________________________________________________ | |
395 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
396 | { | |
397 | // Returns the pointer of the unique instance | |
398 | ||
399 | AliPHOSGeometry * rv = 0 ; | |
400 | if ( fGeom == 0 ) { | |
401 | fGeom = new AliPHOSGeometry(name, title) ; | |
402 | rv = (AliPHOSGeometry * ) fGeom ; | |
403 | } | |
404 | else { | |
405 | if ( strcmp(fGeom->GetName(), name) != 0 ) { | |
406 | cout << "AliPHOSGeometry <E> : current geometry is " << fGeom->GetName() << endl | |
407 | << " you cannot call " << name << endl ; | |
408 | } | |
409 | else | |
410 | rv = (AliPHOSGeometry *) fGeom ; | |
411 | } | |
412 | return rv ; | |
413 | } | |
414 | ||
415 | //____________________________________________________________________________ | |
416 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) | |
417 | { | |
418 | // Converts the relative numbering into the absolute numbering | |
419 | // AbsId = 1:fNModules * fNPhi * fNZ -> PbWO4 | |
420 | // AbsId = 1:fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ -> PPSD | |
421 | ||
422 | Bool_t rv = kTRUE ; | |
423 | ||
424 | if ( relid[1] > 0 ) { // its a PPSD pad | |
425 | ||
426 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate emcal crystals from PPSD pads | |
427 | + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PHOS modules | |
428 | * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2 | |
429 | + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules | |
430 | + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row | |
431 | + relid[3] ; // the column number | |
432 | } | |
433 | else { | |
434 | if ( relid[1] == 0 ) { // its a Phos crystal | |
435 | AbsId = ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules | |
436 | + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row | |
437 | + relid[3] ; // the column number | |
438 | } | |
439 | } | |
440 | ||
441 | return rv ; | |
442 | } | |
443 | ||
444 | //____________________________________________________________________________ | |
445 | ||
446 | void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos ) | |
447 | { | |
448 | // Converts the absolute numbering into the global ALICE coordinates | |
449 | ||
450 | if (id > 0) { | |
451 | ||
452 | Int_t relid[4] ; | |
453 | ||
454 | AbsToRelNumbering(id , relid) ; | |
455 | ||
456 | Int_t phosmodule = relid[0] ; | |
457 | ||
458 | Float_t y0 = 0 ; | |
459 | ||
460 | if ( relid[1] == 0 ) // it is a PbW04 crystal | |
461 | { y0 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
462 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ; | |
463 | } | |
464 | if ( relid[1] > 0 ) { // its a PPSD pad | |
465 | if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) // its an bottom module | |
466 | { | |
467 | y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ; | |
468 | } | |
469 | else // its an upper module | |
470 | y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - GetLeadToMicro2Gap() | |
471 | - GetLeadConverterThickness() - GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0) ; | |
472 | } | |
473 | ||
474 | Float_t x, z ; | |
475 | RelPosInModule(relid, x, z) ; | |
476 | ||
477 | pos.SetX(x) ; | |
478 | pos.SetZ(z) ; | |
479 | pos.SetY( TMath::Sqrt(x*x + z*z + y0*y0) ) ; | |
480 | ||
481 | ||
482 | ||
483 | Float_t phi = GetPHOSAngle( phosmodule) ; | |
484 | Double_t const kRADDEG = 180.0 / kPI ; | |
485 | Float_t rphi = phi / kRADDEG ; | |
486 | ||
487 | TRotation rot ; | |
488 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
489 | ||
490 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
491 | ||
492 | pos.Transform(rot) ; // rotate the baby | |
493 | } | |
494 | else { | |
495 | pos.SetX(0.); | |
496 | pos.SetY(0.); | |
497 | pos.SetZ(0.); | |
498 | } | |
499 | } | |
500 | ||
501 | //____________________________________________________________________________ | |
502 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) | |
503 | { | |
504 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates | |
505 | ||
506 | Int_t ppsdmodule ; | |
507 | Int_t row = relid[2] ; //offset along z axiz | |
508 | Int_t column = relid[3] ; //offset along x axiz | |
509 | ||
510 | Float_t padsizeZ = GetPPSDModuleSize(2)/ GetNumberOfPadsZ(); | |
511 | Float_t padsizeX = GetPPSDModuleSize(0)/ GetNumberOfPadsPhi(); | |
512 | ||
513 | if ( relid[1] == 0 ) { // its a PbW04 crystal | |
514 | x = -( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect | |
515 | z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module | |
516 | } | |
517 | else { | |
518 | if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) | |
519 | ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ(); | |
520 | else ppsdmodule = relid[1] ; | |
521 | Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ; | |
522 | Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ; | |
523 | Float_t x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ; | |
524 | Float_t z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ; | |
525 | x = - ( GetNumberOfPadsPhi()/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect | |
526 | z = ( GetNumberOfPadsZ()/2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module | |
527 | } | |
528 | } | |
529 | ||
530 | //____________________________________________________________________________ | |
531 | void AliPHOSGeometry::SetPHOSAngles() | |
532 | { | |
533 | // Calculates the position in ALICE of the PHOS modules | |
534 | ||
535 | Double_t const kRADDEG = 180.0 / kPI ; | |
536 | Float_t pphi = TMath::ATan( fOuterBoxSize[0] / ( 2.0 * fIPtoOuterCoverDistance ) ) ; | |
537 | pphi *= kRADDEG ; | |
538 | ||
539 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
540 | Float_t angle = pphi * 2 * ( i - fNModules / 2.0 - 0.5 ) ; | |
541 | fPHOSAngle[i-1] = - angle ; | |
542 | } | |
543 | } | |
544 | ||
545 | //____________________________________________________________________________ | |
546 | void AliPHOSGeometry::SetLeadConverterThickness(Float_t e) | |
547 | { | |
548 | // should ultimately disappear | |
549 | ||
550 | cout << " AliPHOSGeometry WARNING : You have changed LeadConverterThickness from " | |
551 | << fLeadConverterThickness << " to " << e << endl ; | |
552 | ||
553 | fLeadConverterThickness = e ; | |
554 | } |