1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
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
23 //*-- Author: Yves Schutz (SUBATECH)
25 // --- ROOT system ---
28 #include "TRotation.h"
30 // --- Standard library ---
34 // --- AliRoot header files ---
36 #include "AliPHOSGeometry.h"
37 #include "AliPHOSPpsdRecPoint.h"
40 ClassImp(AliPHOSGeometry)
42 AliPHOSGeometry * AliPHOSGeometry::fGeom = 0 ;
44 //____________________________________________________________________________
45 AliPHOSGeometry::~AliPHOSGeometry(void)
49 fRotMatrixArray->Delete() ;
50 delete fRotMatrixArray ;
55 //____________________________________________________________________________
56 Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid)
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
68 Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / ( GetNPhi() * GetNZ() ) ) ;
70 if ( phosmodulenumber > GetNModules() ) { // its a PPSD pad
72 id -= GetNPhi() * GetNZ() * GetNModules() ;
73 Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
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() ) ;
81 else { // its a PW04 crystal
83 relid[0] = phosmodulenumber ;
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() ) ;
91 //____________________________________________________________________________
92 void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt)
94 // calculates the angular coverage in theta and phi of a EMC module
99 else if ( opt == kDegre )
100 conv = 180. / TMath::Pi() ;
102 cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
106 Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ;
107 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
108 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
110 Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ;
111 phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.)
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 ;
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 ;
125 //____________________________________________________________________________
126 void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt)
128 // calculates the angular coverage in theta and phi of a single crystal in a EMC module
131 if ( opt == kRadian )
133 else if ( opt == kDegre )
134 conv = 180. / TMath::Pi() ;
136 cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
140 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
141 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
142 theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ;
143 phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ;
147 //____________________________________________________________________________
148 void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x)
150 // calculates the impact coordinates of a neutral particle
151 // emitted in direction theta and phi in ALICE
153 // searches for the PHOS EMC module
155 Double_t tm, tM, pm, pM ;
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 ;
163 if ( ModuleNumber != 0 ) {
164 Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ;
165 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
166 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
167 Double_t angle = phi - phi0;
168 x = y0 * TMath::Tan(angle) ;
169 angle = theta - TMath::Pi() / 2 ;
170 z = y0 * TMath::Tan(angle) ;
174 //____________________________________________________________________________
175 void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat)
177 // Calculates the ALICE global coordinates of a RecPoint and the error matrix
179 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
180 TVector3 localposition ;
182 tmpPHOS->GetLocalPosition(gpos) ;
185 if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
186 { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
187 GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
191 { // it is a PPSD pad
192 AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
193 if (tmpPpsd->GetUp() ) // it is an upper module
195 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
196 GetLeadToMicro2Gap() - GetLeadConverterThickness() -
197 GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
199 else // it is a lower module
200 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
203 Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
204 Double_t const kRADDEG = 180.0 / kPI ;
205 Float_t rphi = phi / kRADDEG ;
208 rot.RotateZ(-rphi) ; // a rotation around Z by angle
210 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
211 gpos.Transform(rot) ; // rotate the baby
215 //____________________________________________________________________________
216 void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos)
218 // Calculates the ALICE global coordinates of a RecPoint
220 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
221 TVector3 localposition ;
222 tmpPHOS->GetLocalPosition(gpos) ;
225 if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
226 { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
227 GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
230 { // it is a PPSD pad
231 AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
232 if (tmpPpsd->GetUp() ) // it is an upper module
234 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
235 GetLeadToMicro2Gap() - GetLeadConverterThickness() -
236 GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
238 else // it is a lower module
239 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
242 Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
243 Double_t const kRADDEG = 180.0 / kPI ;
244 Float_t rphi = phi / kRADDEG ;
247 rot.RotateZ(-rphi) ; // a rotation around Z by angle
249 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
250 gpos.Transform(rot) ; // rotate the baby
253 //____________________________________________________________________________
254 void AliPHOSGeometry::Init(void)
256 // Initializes the PHOS parameters
258 fRotMatrixArray = new TObjArray(fNModules) ;
260 cout << "PHOS geometry setup: parameters for option " << fName << " " << fTitle << endl ;
261 if ( ((strcmp( fName, "default" )) == 0) || ((strcmp( fName, "GPS2" )) == 0) ) {
265 this->SetPHOSAngles() ;
269 cout << "PHOS Geometry setup: option not defined " << fName << endl ;
273 //____________________________________________________________________________
274 void AliPHOSGeometry::InitPHOS(void)
276 // Initializes the EMC parameters
282 fPHOSAngle = new Float_t[fNModules] ;
284 for ( index = 0; index < fNModules; index++ )
285 fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
291 // all these numbers coming next are subject to changes
293 fOuterBoxThickness[0] = 2.8 ;
294 fOuterBoxThickness[1] = 5.0 ;
295 fOuterBoxThickness[2] = 5.0 ;
297 fUpperPlateThickness = 4.0 ;
299 fSecondUpperPlateThickness = 5.0 ;
301 fCrystalSupportHeight = 6.95 ;
302 fCrystalWrapThickness = 0.01 ;
303 fCrystalHolderThickness = 0.005 ;
304 fModuleBoxThickness = 2.0 ;
305 fIPtoOuterCoverDistance = 447.0 ;
306 fIPtoCrystalSurface = 460.0 ;
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 ;
312 fUpperCoolingPlateThickness = 0.06 ;
313 fSupportPlateThickness = 10.0 ;
314 fLowerThermoPlateThickness = 3.0 ;
315 fLowerTextolitPlateThickness = 1.0 ;
316 fGapBetweenCrystals = 0.03 ;
318 fTextolitBoxThickness[0] = 1.5 ;
319 fTextolitBoxThickness[1] = 0.0 ;
320 fTextolitBoxThickness[2] = 3.0 ;
322 fAirThickness[0] = 1.56 ;
323 fAirThickness[1] = 20.5175 ;
324 fAirThickness[2] = 2.48 ;
326 Float_t xtalModulePhiSize = fNPhi * ( fXtlSize[0] + 2 * fGapBetweenCrystals ) ;
327 Float_t xtalModuleZSize = fNZ * ( fXtlSize[2] + 2 * fGapBetweenCrystals ) ;
329 // The next dimensions are calculated from the above parameters
331 fOuterBoxSize[0] = xtalModulePhiSize + 2 * ( fAirThickness[0] + fModuleBoxThickness
332 + fTextolitBoxThickness[0] + fOuterBoxThickness[0] ) ;
333 fOuterBoxSize[1] = ( fXtlSize[1] + fCrystalSupportHeight + fCrystalWrapThickness + fCrystalHolderThickness )
334 + 2 * (fAirThickness[1] + fModuleBoxThickness + fTextolitBoxThickness[1] + fOuterBoxThickness[1] ) ;
335 fOuterBoxSize[2] = xtalModuleZSize + 2 * ( fAirThickness[2] + fModuleBoxThickness
336 + fTextolitBoxThickness[2] + fOuterBoxThickness[2] ) ;
338 fTextolitBoxSize[0] = fOuterBoxSize[0] - 2 * fOuterBoxThickness[0] ;
339 fTextolitBoxSize[1] = fOuterBoxSize[1] - fOuterBoxThickness[1] - fUpperPlateThickness ;
340 fTextolitBoxSize[2] = fOuterBoxSize[2] - 2 * fOuterBoxThickness[2] ;
342 fAirFilledBoxSize[0] = fTextolitBoxSize[0] - 2 * fTextolitBoxThickness[0] ;
343 fAirFilledBoxSize[1] = fTextolitBoxSize[1] - fSecondUpperPlateThickness ;
344 fAirFilledBoxSize[2] = fTextolitBoxSize[2] - 2 * fTextolitBoxThickness[2] ;
348 //____________________________________________________________________________
349 void AliPHOSGeometry::InitPPSD(void)
351 // Initializes the PPSD parameters
353 fAnodeThickness = 0.0009 ;
354 fAvalancheGap = 0.01 ;
355 fCathodeThickness = 0.0009 ;
356 fCompositeThickness = 0.3 ;
357 fConversionGap = 0.6 ;
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 ;
368 fPhiDisplacement = 0.8 ;
369 fZDisplacement = 0.8 ;
371 fMicromegas1Thickness = fLidThickness + 2 * fCompositeThickness + fCathodeThickness + fPCThickness
372 + fAnodeThickness + fConversionGap + fAvalancheGap ;
373 fMicromegas2Thickness = fMicromegas1Thickness ;
376 fPPSDModuleSize[0] = 38.0 ;
377 fPPSDModuleSize[1] = fMicromegas1Thickness ;
378 fPPSDModuleSize[2] = 38.0 ;
380 fPPSDBoxSize[0] = fNumberOfModulesPhi * fPPSDModuleSize[0] + 2 * fPhiDisplacement ;
381 fPPSDBoxSize[1] = fMicromegas2Thickness + fMicromegas2Thickness + fLeadConverterThickness + fMicro1ToLeadGap + fLeadToMicro2Gap ;
382 fPPSDBoxSize[2] = fNumberOfModulesZ * fPPSDModuleSize[2] + 2 * fZDisplacement ;
384 fIPtoTopLidDistance = fIPtoOuterCoverDistance - fPPSDBoxSize[1] - 1. ;
388 //____________________________________________________________________________
389 AliPHOSGeometry * AliPHOSGeometry::GetInstance()
391 // Returns the pointer of the unique instance
393 return (AliPHOSGeometry *) fGeom ;
396 //____________________________________________________________________________
397 AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
399 // Returns the pointer of the unique instance
401 AliPHOSGeometry * rv = 0 ;
403 fGeom = new AliPHOSGeometry(name, title) ;
404 rv = (AliPHOSGeometry * ) fGeom ;
407 if ( strcmp(fGeom->GetName(), name) != 0 ) {
408 cout << "AliPHOSGeometry <E> : current geometry is " << fGeom->GetName() << endl
409 << " you cannot call " << name << endl ;
412 rv = (AliPHOSGeometry *) fGeom ;
417 //____________________________________________________________________________
418 Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId)
420 // Converts the relative numbering into the absolute numbering
421 // AbsId = 1:fNModules * fNPhi * fNZ -> PbWO4
422 // AbsId = 1:fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ -> PPSD
426 if ( relid[1] > 0 ) { // its a PPSD pad
428 AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate emcal crystals from PPSD pads
429 + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PHOS modules
430 * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2
431 + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules
432 + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row
433 + relid[3] ; // the column number
436 if ( relid[1] == 0 ) { // its a Phos crystal
437 AbsId = ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
438 + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row
439 + relid[3] ; // the column number
446 //____________________________________________________________________________
448 void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos )
450 // Converts the absolute numbering into the global ALICE coordinates
456 AbsToRelNumbering(id , relid) ;
458 Int_t phosmodule = relid[0] ;
462 if ( relid[1] == 0 ) // it is a PbW04 crystal
463 { y0 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
464 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ;
466 if ( relid[1] > 0 ) { // its a PPSD pad
467 if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) // its an bottom module
469 y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ;
471 else // its an upper module
472 y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - GetLeadToMicro2Gap()
473 - GetLeadConverterThickness() - GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0) ;
477 RelPosInModule(relid, x, z) ;
481 pos.SetY( TMath::Sqrt(x*x + z*z + y0*y0) ) ;
485 Float_t phi = GetPHOSAngle( phosmodule) ;
486 Double_t const kRADDEG = 180.0 / kPI ;
487 Float_t rphi = phi / kRADDEG ;
490 rot.RotateZ(-rphi) ; // a rotation around Z by angle
492 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
494 pos.Transform(rot) ; // rotate the baby
503 //____________________________________________________________________________
504 void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z)
506 // Converts the relative numbering into the local PHOS-module (x, z) coordinates
509 Int_t row = relid[2] ; //offset along z axiz
510 Int_t column = relid[3] ; //offset along x axiz
512 Float_t padsizeZ = GetPPSDModuleSize(2)/ GetNumberOfPadsZ();
513 Float_t padsizeX = GetPPSDModuleSize(0)/ GetNumberOfPadsPhi();
515 if ( relid[1] == 0 ) { // its a PbW04 crystal
516 x = -( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect
517 z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module
520 if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() )
521 ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ();
522 else ppsdmodule = relid[1] ;
523 Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ;
524 Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ;
525 Float_t x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ;
526 Float_t z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ;
527 x = - ( GetNumberOfPadsPhi()/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect
528 z = ( GetNumberOfPadsZ()/2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module
532 //____________________________________________________________________________
533 void AliPHOSGeometry::SetPHOSAngles()
535 // Calculates the position in ALICE of the PHOS modules
537 Double_t const kRADDEG = 180.0 / kPI ;
538 Float_t pphi = TMath::ATan( fOuterBoxSize[0] / ( 2.0 * fIPtoOuterCoverDistance ) ) ;
541 for( Int_t i = 1; i <= fNModules ; i++ ) {
542 Float_t angle = pphi * 2 * ( i - fNModules / 2.0 - 0.5 ) ;
543 fPHOSAngle[i-1] = - angle ;
547 //____________________________________________________________________________
548 void AliPHOSGeometry::SetLeadConverterThickness(Float_t e)
550 // should ultimately disappear
552 cout << " AliPHOSGeometry WARNING : You have changed LeadConverterThickness from "
553 << fLeadConverterThickness << " to " << e << endl ;
555 fLeadConverterThickness = e ;