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 // PHOS consists of the electromagnetic calorimeter (EMCA)
21 // and a charged particle veto either in the Subatech's version (PPSD)
22 // or in the IHEP's one (CPV).
23 // The EMCA/PPSD/CPV modules are parametrized so that any configuration
24 // can be easily implemented
25 // The title is used to identify the version of CPV used.
27 //*-- Author: Yves Schutz (SUBATECH)
29 // --- ROOT system ---
32 #include "TRotation.h"
34 // --- Standard library ---
38 // --- AliRoot header files ---
40 #include "AliPHOSGeometry.h"
41 #include "AliPHOSPpsdRecPoint.h"
44 ClassImp(AliPHOSGeometry) ;
46 AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ;
47 Bool_t AliPHOSGeometry::fgInit = kFALSE ;
49 //____________________________________________________________________________
50 AliPHOSGeometry::~AliPHOSGeometry(void)
54 if (fRotMatrixArray) fRotMatrixArray->Delete() ;
55 if (fRotMatrixArray) delete fRotMatrixArray ;
56 if (fPHOSAngle ) delete fPHOSAngle ;
59 //____________________________________________________________________________
61 void AliPHOSGeometry::Init(void)
63 // Initializes the PHOS parameters
65 if ( ((strcmp( fName, "default" )) == 0) ||
66 ((strcmp( fName, "GPS2" )) == 0) ||
67 ((strcmp( fName, "IHEP" )) == 0) ||
68 ((strcmp( fName, "MIXT" )) == 0) ) {
75 fGeometryEMCA = new AliPHOSEMCAGeometry();
76 if ( ((strcmp( fName, "GPS2" )) == 0) ) {
77 fGeometryPPSD = new AliPHOSPPSDGeometry();
79 fNPPSDModules = fNModules;
81 else if ( ((strcmp( fName, "IHEP" )) == 0) ) {
82 fGeometryCPV = new AliPHOSCPVGeometry ();
86 else if ( ((strcmp( fName, "MIXT" )) == 0) ) {
87 fGeometryCPV = new AliPHOSCPVGeometry ();
88 fGeometryPPSD = new AliPHOSPPSDGeometry();
91 fGeometrySUPP = new AliPHOSSupportGeometry();
93 fPHOSAngle = new Float_t[fNModules] ;
95 for ( index = 0; index < fNModules; index++ )
96 fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry()
98 this->SetPHOSAngles() ;
99 fRotMatrixArray = new TObjArray(fNModules) ;
103 cout << "PHOS Geometry setup: option not defined " << fName << endl ;
107 //____________________________________________________________________________
108 AliPHOSGeometry * AliPHOSGeometry::GetInstance()
110 // Returns the pointer of the unique instance
111 return (AliPHOSGeometry *) fgGeom ;
114 //____________________________________________________________________________
115 AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title)
117 // Returns the pointer of the unique instance
118 AliPHOSGeometry * rv = 0 ;
120 if ( strcmp(name,"") == 0 )
123 fgGeom = new AliPHOSGeometry(name, title) ;
125 rv = (AliPHOSGeometry * ) fgGeom ;
134 if ( strcmp(fgGeom->GetName(), name) != 0 ) {
135 cout << "AliPHOSGeometry <E> : current geometry is " << fgGeom->GetName() << endl
136 << " you cannot call " << name << endl ;
139 rv = (AliPHOSGeometry *) fgGeom ;
144 //____________________________________________________________________________
145 void AliPHOSGeometry::SetPHOSAngles()
147 // Calculates the position in ALICE of the PHOS modules
149 Double_t const kRADDEG = 180.0 / kPI ;
150 Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoOuterCoverDistance() ) ) ;
152 if (pphi > fAngle) cout << "AliPHOSGeometry: PHOS modules overlap!\n";
155 for( Int_t i = 1; i <= fNModules ; i++ ) {
156 Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ;
157 fPHOSAngle[i-1] = - angle ;
161 //____________________________________________________________________________
162 Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid)
164 // Converts the absolute numbering into the following array/
165 // relid[0] = PHOS Module number 1:fNModules
166 // relid[1] = 0 if PbW04
167 // = PPSD Module number 1:fNumberOfModulesPhi*fNumberOfModulesZ*2 (2->up and bottom level)
168 // relid[2] = Row number inside a PHOS or PPSD module
169 // relid[3] = Column number inside a PHOS or PPSD module
174 Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / ( GetNPhi() * GetNZ() ) ) ;
176 if ( phosmodulenumber > GetNModules() ) { // it is a PPSD or CPV pad
178 if ( strcmp(fName,"GPS2") == 0 ) {
179 id -= GetNPhi() * GetNZ() * GetNModules() ;
180 Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
181 relid[0] = (Int_t)TMath::Ceil( id / tempo ) ;
182 id -= ( relid[0] - 1 ) * tempo ;
183 relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ;
184 id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
185 relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ;
186 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ;
188 else if ( strcmp(fName,"IHEP") == 0 ) {
189 id -= GetNPhi() * GetNZ() * GetNModules() ;
190 Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
191 relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
193 id -= ( relid[0] - 1 ) * nCPV ;
194 relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
195 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ;
197 else if ( strcmp(fName,"MIXT") == 0 ) {
198 id -= GetNPhi() * GetNZ() * GetNModules() ;
199 Float_t nPPSD = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
200 Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ;
201 if (id <= nCPV*GetNCPVModules()) { // this pad belons to CPV
202 relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ;
204 id -= ( relid[0] - 1 ) * nCPV ;
205 relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ;
206 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ;
208 else { // this pad belons to PPSD
209 id -= nCPV*GetNCPVModules();
210 relid[0] = (Int_t)TMath::Ceil( id / nPPSD );
211 id -= ( relid[0] - 1 ) * nPPSD ;
212 relid[0] += GetNCPVModules();
213 relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ;
214 id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ;
215 relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ;
216 relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ;
220 else { // its a PW04 crystal
222 relid[0] = phosmodulenumber ;
224 id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ;
225 relid[2] = (Int_t)TMath::Ceil( id / GetNPhi() ) ;
226 relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNPhi() ) ;
231 //____________________________________________________________________________
232 void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt)
234 // calculates the angular coverage in theta and phi of a EMC module
237 if ( opt == Radian() )
239 else if ( opt == Degre() )
240 conv = 180. / TMath::Pi() ;
242 cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
246 Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ;
247 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
248 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
250 Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ;
251 phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.)
252 Double_t max = phi - angle ;
253 Double_t min = phi + angle ;
254 pM = TMath::Max(max, min) * conv ;
255 pm = TMath::Min(max, min) * conv ;
257 angle = TMath::ATan( GetCrystalSize(2)*GetNZ() / (2 * y0) ) ;
258 max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.)
259 min = TMath::Pi() / 2. - angle ;
260 tM = TMath::Max(max, min) * conv ;
261 tm = TMath::Min(max, min) * conv ;
265 //____________________________________________________________________________
266 void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt)
268 // calculates the angular coverage in theta and phi of a single crystal in a EMC module
271 if ( opt == Radian() )
273 else if ( opt == Degre() )
274 conv = 180. / TMath::Pi() ;
276 cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ;
280 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
281 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
282 theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ;
283 phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ;
287 //____________________________________________________________________________
288 void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const
290 // Calculates the ALICE global coordinates of a RecPoint and the error matrix
292 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
293 TVector3 localposition ;
295 tmpPHOS->GetLocalPosition(gpos) ;
298 if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
299 { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
300 GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
304 { // it is a PPSD pad
305 AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
306 if (tmpPpsd->GetUp() ) // it is an upper module
308 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
309 GetLeadToMicro2Gap() - GetLeadConverterThickness() -
310 GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
312 else // it is a lower module
313 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
316 Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
317 Double_t const kRADDEG = 180.0 / kPI ;
318 Float_t rphi = phi / kRADDEG ;
321 rot.RotateZ(-rphi) ; // a rotation around Z by angle
323 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
324 gpos.Transform(rot) ; // rotate the baby
328 //____________________________________________________________________________
329 void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const
331 // Calculates the ALICE global coordinates of a RecPoint
333 AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ;
334 TVector3 localposition ;
335 tmpPHOS->GetLocalPosition(gpos) ;
338 if ( tmpPHOS->IsEmc() ) // it is a EMC crystal
339 { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() +
340 GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ;
343 { // it is a PPSD pad
344 AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ;
345 if (tmpPpsd->GetUp() ) // it is an upper module
347 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() -
348 GetLeadToMicro2Gap() - GetLeadConverterThickness() -
349 GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ;
351 else // it is a lower module
352 gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ;
355 Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ;
356 Double_t const kRADDEG = 180.0 / kPI ;
357 Float_t rphi = phi / kRADDEG ;
360 rot.RotateZ(-rphi) ; // a rotation around Z by angle
362 TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame
363 gpos.Transform(rot) ; // rotate the baby
366 //____________________________________________________________________________
367 void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x)
369 // calculates the impact coordinates of a neutral particle
370 // emitted in direction theta and phi in ALICE
372 // searches for the PHOS EMC module
374 Double_t tm, tM, pm, pM ;
376 while ( ModuleNumber == 0 && index <= GetNModules() ) {
377 EmcModuleCoverage(index, tm, tM, pm, pM) ;
378 if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) )
379 ModuleNumber = index ;
382 if ( ModuleNumber != 0 ) {
383 Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ;
384 Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
385 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ;
386 Double_t angle = phi - phi0;
387 x = y0 * TMath::Tan(angle) ;
388 angle = theta - TMath::Pi() / 2 ;
389 z = y0 * TMath::Tan(angle) ;
393 //____________________________________________________________________________
394 Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId)
396 // Converts the relative numbering into the absolute numbering
398 // AbsId = from 1 to fNModules * fNPhi * fNZ
400 // AbsId = from N(total EMCA crystals) + 1
401 // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ +
402 // fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ
404 // AbsId = from N(total PHOS crystals) + 1
405 // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ
409 if ( relid[1] > 0 && strcmp(fName,"GPS2")==0) { // it is a PPSD pad
410 AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from PPSD pads
411 + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PPSD modules
412 * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2
413 + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules
414 + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row
415 + relid[3] ; // the column number
418 else if ( relid[1] > 0 && strcmp(fName,"MIXT")==0) { // it is a PPSD pad
419 AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from PPSD pads
420 + GetNCPVModules() * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of CPV modules if any
421 + ( relid[0] - 1 - GetNCPVModules())
422 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PPSD modules
423 * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2
424 + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules
425 + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row
426 + relid[3] ; // the column number
429 else if ( relid[1] == 0 ) { // it is a Phos crystal
431 ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules
432 + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row
433 + relid[3] ; // the column number
436 else if ( relid[1] == -1 ) { // it is a CPV pad
437 AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads
438 + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules
439 + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row
440 + 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
451 // It works only for the GPS2 geometry
453 if (id > 0 && strcmp(fName,"GPS2")==0) {
457 AbsToRelNumbering(id , relid) ;
459 Int_t phosmodule = relid[0] ;
463 if ( relid[1] == 0 ) { // it is a PbW04 crystal
464 y0 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness()
465 + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ;
467 if ( relid[1] > 0 ) { // its a PPSD pad
468 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
507 // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000)
509 Bool_t padOfCPV = (strcmp(fName,"IHEP")==0) ||
510 ((strcmp(fName,"MIXT")==0) && relid[0]<=GetNCPVModules()) ;
511 Bool_t padOfPPSD = (strcmp(fName,"GPS2")==0) ||
512 ((strcmp(fName,"MIXT")==0) && relid[0]> GetNCPVModules()) ;
516 Int_t row = relid[2] ; //offset along x axiz
517 Int_t column = relid[3] ; //offset along z axiz
519 Float_t padsizeZ = 0;
520 Float_t padsizeX = 0;
521 Int_t nOfPadsPhi = 0;
524 padsizeZ = GetPPSDModuleSize(2) / GetNumberOfPadsZ();
525 padsizeX = GetPPSDModuleSize(0) / GetNumberOfPadsPhi();
526 nOfPadsPhi = GetNumberOfPadsPhi();
527 nOfPadsZ = GetNumberOfPadsZ();
529 else if ( padOfCPV ) {
530 padsizeZ = GetPadSizeZ();
531 padsizeX = GetPadSizePhi();
532 nOfPadsPhi = GetNumberOfCPVPadsPhi();
533 nOfPadsZ = GetNumberOfCPVPadsZ();
536 if ( relid[1] == 0 ) { // its a PbW04 crystal
537 x = - ( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect
538 z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module
542 if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() )
543 ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ();
545 ppsdmodule = relid[1] ;
546 Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ;
547 Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ;
548 x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ;
549 z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ;
554 x = - ( nOfPadsPhi/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect
555 z = ( nOfPadsZ /2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module