AliPHOSv0, AliPHOSv4 could not be instantiated because methods from the pure abstract...
[u/mrichter/AliRoot.git] / PHOS / AliPHOSGeometry.cxx
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d15a28e7 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
b2a60966 16/* $Id$ */
17
d15a28e7 18//_________________________________________________________________________
b2a60966 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)
d15a28e7 24
25// --- ROOT system ---
26
27#include "TVector3.h"
28#include "TRotation.h"
29
30// --- Standard library ---
31
de9ec31b 32#include <iostream.h>
d15a28e7 33
34// --- AliRoot header files ---
35
36#include "AliPHOSGeometry.h"
37#include "AliPHOSPpsdRecPoint.h"
38#include "AliConst.h"
39
9ec91567 40ClassImp(AliPHOSGeometry) ;
d15a28e7 41
9ec91567 42AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
43
d15a28e7 44//____________________________________________________________________________
45AliPHOSGeometry::~AliPHOSGeometry(void)
46{
b2a60966 47 // dtor
48
d15a28e7 49 fRotMatrixArray->Delete() ;
50 delete fRotMatrixArray ;
4697edca 51
52 delete fPHOSAngle ;
d15a28e7 53}
54
55//____________________________________________________________________________
92862013 56Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid)
d15a28e7 57{
b2a60966 58 // Converts the absolute numbering into the following array/
59 // relid[0] = PHOS Module number 1:fNModules
60 // relid[1] = 0 if PbW04
61 // = PPSD Module number 1:fNumberOfModulesPhi*fNumberOfModulesZ*2 (2->up and bottom level)
62 // relid[2] = Row number inside a PHOS or PPSD module
63 // relid[3] = Column number inside a PHOS or PPSD module
d15a28e7 64
65 Bool_t rv = kTRUE ;
92862013 66 Float_t id = AbsId ;
d15a28e7 67
92862013 68 Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / ( GetNPhi() * GetNZ() ) ) ;
d15a28e7 69
92862013 70 if ( phosmodulenumber > GetNModules() ) { // its a PPSD pad
d15a28e7 71
92862013 72 id -= GetNPhi() * GetNZ() * GetNModules() ;
d15a28e7 73 Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
92862013 74 relid[0] = (Int_t)TMath::Ceil( id / tempo ) ;
75 id -= ( relid[0] - 1 ) * tempo ;
76 relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ;
77 id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
78 relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ;
79 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ;
d15a28e7 80 }
81 else { // its a PW04 crystal
82
92862013 83 relid[0] = phosmodulenumber ;
84 relid[1] = 0 ;
85 id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
86 relid[2] = (Int_t)TMath::Ceil( id / GetNPhi() ) ;
87 relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNPhi() ) ;
d15a28e7 88 }
89 return rv ;
90}
9f616d61 91//____________________________________________________________________________
92void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt)
93{
94 // calculates the angular coverage in theta and phi of a EMC module
95
96 Double_t conv ;
cf0c2bc1 97 if ( opt == Radian() )
9f616d61 98 conv = 1. ;
cf0c2bc1 99 else if ( opt == Degre() )
9f616d61 100 conv = 180. / TMath::Pi() ;
101 else {
102 cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
103 conv = 1. ;
104 }
105
106 Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ;
92862013 107 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
9f616d61 108 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
109
92862013 110 Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ;
9f616d61 111 phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.)
92862013 112 Double_t max = phi - angle ;
113 Double_t min = phi + angle ;
114 pM = TMath::Max(max, min) * conv ;
115 pm = TMath::Min(max, min) * conv ;
9f616d61 116
92862013 117 angle = TMath::ATan( GetCrystalSize(2)*GetNZ() / (2 * y0) ) ;
118 max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.)
119 min = TMath::Pi() / 2. - angle ;
120 tM = TMath::Max(max, min) * conv ;
121 tm = TMath::Min(max, min) * conv ;
9f616d61 122
123}
124
125//____________________________________________________________________________
126void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt)
127{
128 // calculates the angular coverage in theta and phi of a single crystal in a EMC module
129
130 Double_t conv ;
cf0c2bc1 131 if ( opt == Radian() )
9f616d61 132 conv = 1. ;
cf0c2bc1 133 else if ( opt == Degre() )
9f616d61 134 conv = 180. / TMath::Pi() ;
135 else {
136 cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
137 conv = 1. ;
138 }
139
92862013 140 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
9f616d61 141 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
92862013 142 theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ;
143 phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ;
9f616d61 144}
145
146
147//____________________________________________________________________________
148void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x)
149{
150 // calculates the impact coordinates of a neutral particle
151 // emitted in direction theta and phi in ALICE
152
153 // searches for the PHOS EMC module
154 ModuleNumber = 0 ;
155 Double_t tm, tM, pm, pM ;
156 Int_t index = 1 ;
157 while ( ModuleNumber == 0 && index <= GetNModules() ) {
158 EmcModuleCoverage(index, tm, tM, pm, pM) ;
159 if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) )
160 ModuleNumber = index ;
161 index++ ;
162 }
163 if ( ModuleNumber != 0 ) {
164 Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ;
92862013 165 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
9f616d61 166 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
167 Double_t angle = phi - phi0;
92862013 168 x = y0 * TMath::Tan(angle) ;
9f616d61 169 angle = theta - TMath::Pi() / 2 ;
92862013 170 z = y0 * TMath::Tan(angle) ;
9f616d61 171 }
172}
d15a28e7 173
174//____________________________________________________________________________
175void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat)
176{
b2a60966 177 // Calculates the ALICE global coordinates of a RecPoint and the error matrix
178
d15a28e7 179 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
92862013 180 TVector3 localposition ;
d15a28e7 181
182 tmpPHOS->GetLocalPosition(gpos) ;
183
184
185 if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
186 { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
187 GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
188
189 }
190 else
191 { // it is a PPSD pad
192 AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
193 if (tmpPpsd->GetUp() ) // it is an upper module
194 {
195 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
196 GetLeadToMicro2Gap() - GetLeadConverterThickness() -
197 GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
198 }
199 else // it is a lower module
200 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
201 }
202
92862013 203 Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
204 Double_t const kRADDEG = 180.0 / kPI ;
205 Float_t rphi = phi / kRADDEG ;
d15a28e7 206
92862013 207 TRotation rot ;
208 rot.RotateZ(-rphi) ; // a rotation around Z by angle
d15a28e7 209
92862013 210 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
211 gpos.Transform(rot) ; // rotate the baby
6ad0bfa0 212
d15a28e7 213}
214
215//____________________________________________________________________________
216void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos)
217{
b2a60966 218 // Calculates the ALICE global coordinates of a RecPoint
219
d15a28e7 220 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
92862013 221 TVector3 localposition ;
d15a28e7 222 tmpPHOS->GetLocalPosition(gpos) ;
223
224
225 if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
226 { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
227 GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
228 }
229 else
230 { // it is a PPSD pad
231 AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
232 if (tmpPpsd->GetUp() ) // it is an upper module
233 {
234 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
235 GetLeadToMicro2Gap() - GetLeadConverterThickness() -
236 GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
237 }
238 else // it is a lower module
239 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
240 }
241
92862013 242 Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
243 Double_t const kRADDEG = 180.0 / kPI ;
244 Float_t rphi = phi / kRADDEG ;
d15a28e7 245
92862013 246 TRotation rot ;
247 rot.RotateZ(-rphi) ; // a rotation around Z by angle
d15a28e7 248
92862013 249 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
250 gpos.Transform(rot) ; // rotate the baby
d15a28e7 251}
252
253//____________________________________________________________________________
254void AliPHOSGeometry::Init(void)
255{
b2a60966 256 // Initializes the PHOS parameters
257
d15a28e7 258 fRotMatrixArray = new TObjArray(fNModules) ;
259
260 cout << "PHOS geometry setup: parameters for option " << fName << " " << fTitle << endl ;
261 if ( ((strcmp( fName, "default" )) == 0) || ((strcmp( fName, "GPS2" )) == 0) ) {
262 fInit = kTRUE ;
263 this->InitPHOS() ;
264 this->InitPPSD() ;
265 this->SetPHOSAngles() ;
266 }
267 else {
268 fInit = kFALSE ;
269 cout << "PHOS Geometry setup: option not defined " << fName << endl ;
270 }
271}
272
273//____________________________________________________________________________
274void AliPHOSGeometry::InitPHOS(void)
275{
b2a60966 276 // Initializes the EMC parameters
d15a28e7 277
278 fNPhi = 64 ;
279 fNZ = 64 ;
280 fNModules = 5 ;
4697edca 281
282 fPHOSAngle = new Float_t[fNModules] ;
283 Int_t index ;
284 for ( index = 0; index < fNModules; index++ )
285 fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
d15a28e7 286
d15a28e7 287 fXtlSize[0] = 2.2 ;
288 fXtlSize[1] = 18.0 ;
289 fXtlSize[2] = 2.2 ;
290
291 // all these numbers coming next are subject to changes
292
293 fOuterBoxThickness[0] = 2.8 ;
294 fOuterBoxThickness[1] = 5.0 ;
295 fOuterBoxThickness[2] = 5.0 ;
296
297 fUpperPlateThickness = 4.0 ;
298
299 fSecondUpperPlateThickness = 5.0 ;
300
301 fCrystalSupportHeight = 6.95 ;
302 fCrystalWrapThickness = 0.01 ;
303 fCrystalHolderThickness = 0.005 ;
304 fModuleBoxThickness = 2.0 ;
305 fIPtoOuterCoverDistance = 447.0 ;
306 fIPtoCrystalSurface = 460.0 ;
307
92862013 308 fPinDiodeSize[0] = 1.71 ; //Values given by Odd Harald feb 2000
309 fPinDiodeSize[1] = 0.0280 ; // 0.0280 is the depth of active layer in the silicon
310 fPinDiodeSize[2] = 1.61 ;
d15a28e7 311
312 fUpperCoolingPlateThickness = 0.06 ;
313 fSupportPlateThickness = 10.0 ;
314 fLowerThermoPlateThickness = 3.0 ;
315 fLowerTextolitPlateThickness = 1.0 ;
316 fGapBetweenCrystals = 0.03 ;
317
318 fTextolitBoxThickness[0] = 1.5 ;
319 fTextolitBoxThickness[1] = 0.0 ;
320 fTextolitBoxThickness[2] = 3.0 ;
321
322 fAirThickness[0] = 1.56 ;
323 fAirThickness[1] = 20.5175 ;
324 fAirThickness[2] = 2.48 ;
325
92862013 326 Float_t xtalModulePhiSize = fNPhi * ( fXtlSize[0] + 2 * fGapBetweenCrystals ) ;
327 Float_t xtalModuleZSize = fNZ * ( fXtlSize[2] + 2 * fGapBetweenCrystals ) ;
d15a28e7 328
329 // The next dimensions are calculated from the above parameters
330
92862013 331 fOuterBoxSize[0] = xtalModulePhiSize + 2 * ( fAirThickness[0] + fModuleBoxThickness
d15a28e7 332 + fTextolitBoxThickness[0] + fOuterBoxThickness[0] ) ;
333 fOuterBoxSize[1] = ( fXtlSize[1] + fCrystalSupportHeight + fCrystalWrapThickness + fCrystalHolderThickness )
334 + 2 * (fAirThickness[1] + fModuleBoxThickness + fTextolitBoxThickness[1] + fOuterBoxThickness[1] ) ;
92862013 335 fOuterBoxSize[2] = xtalModuleZSize + 2 * ( fAirThickness[2] + fModuleBoxThickness
d15a28e7 336 + fTextolitBoxThickness[2] + fOuterBoxThickness[2] ) ;
337
338 fTextolitBoxSize[0] = fOuterBoxSize[0] - 2 * fOuterBoxThickness[0] ;
339 fTextolitBoxSize[1] = fOuterBoxSize[1] - fOuterBoxThickness[1] - fUpperPlateThickness ;
340 fTextolitBoxSize[2] = fOuterBoxSize[2] - 2 * fOuterBoxThickness[2] ;
341
342 fAirFilledBoxSize[0] = fTextolitBoxSize[0] - 2 * fTextolitBoxThickness[0] ;
343 fAirFilledBoxSize[1] = fTextolitBoxSize[1] - fSecondUpperPlateThickness ;
344 fAirFilledBoxSize[2] = fTextolitBoxSize[2] - 2 * fTextolitBoxThickness[2] ;
345
346}
347
348//____________________________________________________________________________
349void AliPHOSGeometry::InitPPSD(void)
350{
b2a60966 351 // Initializes the PPSD parameters
d15a28e7 352
353 fAnodeThickness = 0.0009 ;
354 fAvalancheGap = 0.01 ;
355 fCathodeThickness = 0.0009 ;
356 fCompositeThickness = 0.3 ;
9f616d61 357 fConversionGap = 0.6 ;
d15a28e7 358 fLeadConverterThickness = 0.56 ;
359 fLeadToMicro2Gap = 0.1 ;
360 fLidThickness = 0.2 ;
361 fMicro1ToLeadGap = 0.1 ;
362 fMicromegasWallThickness = 0.6 ;
363 fNumberOfModulesPhi = 4 ;
364 fNumberOfModulesZ = 4 ;
365 fNumberOfPadsPhi = 24 ;
366 fNumberOfPadsZ = 24 ;
367 fPCThickness = 0.1 ;
368 fPhiDisplacement = 0.8 ;
369 fZDisplacement = 0.8 ;
370
371 fMicromegas1Thickness = fLidThickness + 2 * fCompositeThickness + fCathodeThickness + fPCThickness
372 + fAnodeThickness + fConversionGap + fAvalancheGap ;
373 fMicromegas2Thickness = fMicromegas1Thickness ;
374
375
376 fPPSDModuleSize[0] = 38.0 ;
377 fPPSDModuleSize[1] = fMicromegas1Thickness ;
378 fPPSDModuleSize[2] = 38.0 ;
379
380 fPPSDBoxSize[0] = fNumberOfModulesPhi * fPPSDModuleSize[0] + 2 * fPhiDisplacement ;
381 fPPSDBoxSize[1] = fMicromegas2Thickness + fMicromegas2Thickness + fLeadConverterThickness + fMicro1ToLeadGap + fLeadToMicro2Gap ;
382 fPPSDBoxSize[2] = fNumberOfModulesZ * fPPSDModuleSize[2] + 2 * fZDisplacement ;
383
384 fIPtoTopLidDistance = fIPtoOuterCoverDistance - fPPSDBoxSize[1] - 1. ;
385
386}
387
388//____________________________________________________________________________
389AliPHOSGeometry * AliPHOSGeometry::GetInstance()
390{
b2a60966 391 // Returns the pointer of the unique instance
88714635 392 return (AliPHOSGeometry *) fgGeom ;
d15a28e7 393}
394
395//____________________________________________________________________________
396AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
397{
b2a60966 398 // Returns the pointer of the unique instance
399
d15a28e7 400 AliPHOSGeometry * rv = 0 ;
88714635 401 if ( fgGeom == 0 ) {
402 fgGeom = new AliPHOSGeometry(name, title) ;
403 rv = (AliPHOSGeometry * ) fgGeom ;
d15a28e7 404 }
405 else {
88714635 406 if ( strcmp(fgGeom->GetName(), name) != 0 ) {
407 cout << "AliPHOSGeometry <E> : current geometry is " << fgGeom->GetName() << endl
d15a28e7 408 << " you cannot call " << name << endl ;
409 }
410 else
88714635 411 rv = (AliPHOSGeometry *) fgGeom ;
d15a28e7 412 }
413 return rv ;
414}
415
416//____________________________________________________________________________
92862013 417Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId)
d15a28e7 418{
b2a60966 419 // Converts the relative numbering into the absolute numbering
420 // AbsId = 1:fNModules * fNPhi * fNZ -> PbWO4
421 // AbsId = 1:fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ -> PPSD
d15a28e7 422
423 Bool_t rv = kTRUE ;
424
92862013 425 if ( relid[1] > 0 ) { // its a PPSD pad
d15a28e7 426
427 AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate emcal crystals from PPSD pads
92862013 428 + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PHOS modules
d15a28e7 429 * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2
92862013 430 + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules
431 + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row
432 + relid[3] ; // the column number
d15a28e7 433 }
434 else {
92862013 435 if ( relid[1] == 0 ) { // its a Phos crystal
436 AbsId = ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
437 + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row
438 + relid[3] ; // the column number
d15a28e7 439 }
440 }
441
442 return rv ;
443}
444
445//____________________________________________________________________________
446
92862013 447void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos )
d15a28e7 448{
b2a60966 449 // Converts the absolute numbering into the global ALICE coordinates
450
92862013 451 if (id > 0) {
d15a28e7 452
92862013 453 Int_t relid[4] ;
d15a28e7 454
92862013 455 AbsToRelNumbering(id , relid) ;
d15a28e7 456
92862013 457 Int_t phosmodule = relid[0] ;
d15a28e7 458
92862013 459 Float_t y0 = 0 ;
9f616d61 460
92862013 461 if ( relid[1] == 0 ) // it is a PbW04 crystal
462 { y0 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
9f616d61 463 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ;
d15a28e7 464 }
92862013 465 if ( relid[1] > 0 ) { // its a PPSD pad
466 if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) // its an bottom module
d15a28e7 467 {
92862013 468 y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ;
d15a28e7 469 }
470 else // its an upper module
92862013 471 y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - GetLeadToMicro2Gap()
9f616d61 472 - GetLeadConverterThickness() - GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0) ;
d15a28e7 473 }
474
475 Float_t x, z ;
92862013 476 RelPosInModule(relid, x, z) ;
d15a28e7 477
9f616d61 478 pos.SetX(x) ;
479 pos.SetZ(z) ;
92862013 480 pos.SetY( TMath::Sqrt(x*x + z*z + y0*y0) ) ;
9f616d61 481
d15a28e7 482
483
92862013 484 Float_t phi = GetPHOSAngle( phosmodule) ;
485 Double_t const kRADDEG = 180.0 / kPI ;
486 Float_t rphi = phi / kRADDEG ;
d15a28e7 487
92862013 488 TRotation rot ;
489 rot.RotateZ(-rphi) ; // a rotation around Z by angle
d15a28e7 490
92862013 491 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
d15a28e7 492
92862013 493 pos.Transform(rot) ; // rotate the baby
d15a28e7 494 }
495 else {
496 pos.SetX(0.);
497 pos.SetY(0.);
498 pos.SetZ(0.);
499 }
500}
501
502//____________________________________________________________________________
92862013 503void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z)
d15a28e7 504{
b2a60966 505 // Converts the relative numbering into the local PHOS-module (x, z) coordinates
506
92862013 507 Int_t ppsdmodule ;
508 Int_t row = relid[2] ; //offset along z axiz
509 Int_t column = relid[3] ; //offset along x axiz
d15a28e7 510
92862013 511 Float_t padsizeZ = GetPPSDModuleSize(2)/ GetNumberOfPadsZ();
512 Float_t padsizeX = GetPPSDModuleSize(0)/ GetNumberOfPadsPhi();
d15a28e7 513
92862013 514 if ( relid[1] == 0 ) { // its a PbW04 crystal
515 x = -( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect
516 z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module
d15a28e7 517 }
518 else {
92862013 519 if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() )
520 ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ();
521 else ppsdmodule = relid[1] ;
522 Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ;
523 Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ;
524 Float_t x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ;
525 Float_t z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ;
526 x = - ( GetNumberOfPadsPhi()/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect
527 z = ( GetNumberOfPadsZ()/2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module
d15a28e7 528 }
529}
530
531//____________________________________________________________________________
c1afa0e3 532void AliPHOSGeometry::SetPHOSAngles()
d15a28e7 533{
b2a60966 534 // Calculates the position in ALICE of the PHOS modules
535
92862013 536 Double_t const kRADDEG = 180.0 / kPI ;
537 Float_t pphi = TMath::ATan( fOuterBoxSize[0] / ( 2.0 * fIPtoOuterCoverDistance ) ) ;
538 pphi *= kRADDEG ;
d15a28e7 539
540 for( Int_t i = 1; i <= fNModules ; i++ ) {
92862013 541 Float_t angle = pphi * 2 * ( i - fNModules / 2.0 - 0.5 ) ;
d15a28e7 542 fPHOSAngle[i-1] = - angle ;
c1afa0e3 543 }
d15a28e7 544}
545
2f3366b6 546//____________________________________________________________________________
547void AliPHOSGeometry::SetLeadConverterThickness(Float_t e)
548{
549 // should ultimately disappear
b2a60966 550
2f3366b6 551 cout << " AliPHOSGeometry WARNING : You have changed LeadConverterThickness from "
552 << fLeadConverterThickness << " to " << e << endl ;
553
554 fLeadConverterThickness = e ;
555}