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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 |
a3dfe79c | 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. | |
b2a60966 | 26 | // |
27 | //*-- Author: Yves Schutz (SUBATECH) | |
d15a28e7 | 28 | |
29 | // --- ROOT system --- | |
30 | ||
31 | #include "TVector3.h" | |
32 | #include "TRotation.h" | |
fa7cce36 | 33 | #include "TFolder.h" |
34 | #include "TROOT.h" | |
d15a28e7 | 35 | |
36 | // --- Standard library --- | |
37 | ||
de9ec31b | 38 | #include <iostream.h> |
4410223b | 39 | #include <stdlib.h> |
d15a28e7 | 40 | |
41 | // --- AliRoot header files --- | |
42 | ||
43 | #include "AliPHOSGeometry.h" | |
468794ea | 44 | #include "AliPHOSEMCAGeometry.h" |
d15a28e7 | 45 | #include "AliPHOSPpsdRecPoint.h" |
46 | #include "AliConst.h" | |
47 | ||
9ec91567 | 48 | ClassImp(AliPHOSGeometry) ; |
d15a28e7 | 49 | |
a4e98857 | 50 | // these initialisations are needed for a singleton |
9ec91567 | 51 | AliPHOSGeometry * AliPHOSGeometry::fgGeom = 0 ; |
282c5906 | 52 | Bool_t AliPHOSGeometry::fgInit = kFALSE ; |
9ec91567 | 53 | |
d15a28e7 | 54 | //____________________________________________________________________________ |
55 | AliPHOSGeometry::~AliPHOSGeometry(void) | |
56 | { | |
b2a60966 | 57 | // dtor |
58 | ||
52a36ffd | 59 | if (fRotMatrixArray) fRotMatrixArray->Delete() ; |
60 | if (fRotMatrixArray) delete fRotMatrixArray ; | |
61 | if (fPHOSAngle ) delete fPHOSAngle ; | |
62 | } | |
63 | ||
64 | //____________________________________________________________________________ | |
65 | ||
66 | void AliPHOSGeometry::Init(void) | |
67 | { | |
a4e98857 | 68 | // Initializes the PHOS parameters : |
69 | // IHEP is the Protvino CPV (cathode pad chambers) | |
70 | // GPS2 is the Subatech Pre-Shower (two micromegas sandwiching a passive lead converter) | |
71 | // MIXT 4 PHOS modules withe the IHEP CPV qnd one PHOS module with the Subatche Pre-Shower | |
52a36ffd | 72 | |
a4e98857 | 73 | if ( ((strcmp( fName, "GPS2" )) == 0) || |
ed4205d8 | 74 | ((strcmp( fName, "IHEP" )) == 0) || |
75 | ((strcmp( fName, "MIXT" )) == 0) ) { | |
52a36ffd | 76 | fgInit = kTRUE ; |
ed4205d8 | 77 | |
78 | fNModules = 5; | |
79 | fNPPSDModules = 0; | |
80 | fAngle = 20; | |
81 | ||
82 | fGeometryEMCA = new AliPHOSEMCAGeometry(); | |
83 | if ( ((strcmp( fName, "GPS2" )) == 0) ) { | |
84 | fGeometryPPSD = new AliPHOSPPSDGeometry(); | |
85 | fGeometryCPV = 0; | |
86 | fNPPSDModules = fNModules; | |
87 | } | |
88 | else if ( ((strcmp( fName, "IHEP" )) == 0) ) { | |
89 | fGeometryCPV = new AliPHOSCPVGeometry (); | |
90 | fGeometryPPSD = 0; | |
91 | fNPPSDModules = 0; | |
92 | } | |
93 | else if ( ((strcmp( fName, "MIXT" )) == 0) ) { | |
94 | fGeometryCPV = new AliPHOSCPVGeometry (); | |
95 | fGeometryPPSD = new AliPHOSPPSDGeometry(); | |
96 | fNPPSDModules = 1; | |
97 | } | |
98 | fGeometrySUPP = new AliPHOSSupportGeometry(); | |
99 | ||
52a36ffd | 100 | fPHOSAngle = new Float_t[fNModules] ; |
101 | Int_t index ; | |
102 | for ( index = 0; index < fNModules; index++ ) | |
103 | fPHOSAngle[index] = 0.0 ; // Module position angles are set in CreateGeometry() | |
104 | ||
105 | this->SetPHOSAngles() ; | |
106 | fRotMatrixArray = new TObjArray(fNModules) ; | |
fa7cce36 | 107 | |
108 | // post the geometry into the appropriate folder | |
7b7c1533 | 109 | TFolder * folder = (TFolder*)gROOT->FindObjectAny("YSAlice/WhiteBoard/Geometry/PHOS"); |
110 | if ( !folder ) { | |
111 | cerr << "ERROR: AliPHOSGeometry::Init -> No WhiteBoard/Geometry/PHOS found !" << endl ; | |
112 | abort(); | |
113 | } else { | |
fa7cce36 | 114 | folder->SetOwner() ; |
115 | folder->Add(this) ; | |
7b7c1533 | 116 | } |
52a36ffd | 117 | } |
ed4205d8 | 118 | else { |
119 | fgInit = kFALSE ; | |
120 | cout << "PHOS Geometry setup: option not defined " << fName << endl ; | |
121 | } | |
52a36ffd | 122 | } |
123 | ||
2f04ed65 | 124 | //____________________________________________________________________________ |
a4e98857 | 125 | Float_t AliPHOSGeometry::GetCPVBoxSize(Int_t index) const |
126 | { | |
127 | // returns the coarse dimension CPV depending on the CPV option set | |
128 | ||
2f04ed65 | 129 | if (strcmp(fName,"GPS2") ==0 ) |
130 | return fGeometryPPSD->GetCPVBoxSize(index); | |
131 | else if (strcmp(fName,"IHEP")==0) | |
132 | return fGeometryCPV ->GetCPVBoxSize(index); | |
133 | else if (strcmp(fName,"MIXT")==0) | |
134 | return TMath::Max(fGeometryCPV ->GetCPVBoxSize(index), fGeometryPPSD->GetCPVBoxSize(index)); | |
135 | else | |
136 | return 0; | |
137 | } | |
138 | ||
52a36ffd | 139 | //____________________________________________________________________________ |
140 | AliPHOSGeometry * AliPHOSGeometry::GetInstance() | |
141 | { | |
a4e98857 | 142 | // Returns the pointer of the unique instance; singleton specific |
143 | ||
52a36ffd | 144 | return (AliPHOSGeometry *) fgGeom ; |
145 | } | |
146 | ||
147 | //____________________________________________________________________________ | |
148 | AliPHOSGeometry * AliPHOSGeometry::GetInstance(const Text_t* name, const Text_t* title) | |
149 | { | |
150 | // Returns the pointer of the unique instance | |
a4e98857 | 151 | // Creates it with the specified options (name, title) if it does not exist yet |
152 | ||
52a36ffd | 153 | AliPHOSGeometry * rv = 0 ; |
154 | if ( fgGeom == 0 ) { | |
155 | if ( strcmp(name,"") == 0 ) | |
156 | rv = 0 ; | |
157 | else { | |
158 | fgGeom = new AliPHOSGeometry(name, title) ; | |
159 | if ( fgInit ) | |
160 | rv = (AliPHOSGeometry * ) fgGeom ; | |
161 | else { | |
162 | rv = 0 ; | |
163 | delete fgGeom ; | |
164 | fgGeom = 0 ; | |
165 | } | |
166 | } | |
167 | } | |
168 | else { | |
169 | if ( strcmp(fgGeom->GetName(), name) != 0 ) { | |
170 | cout << "AliPHOSGeometry <E> : current geometry is " << fgGeom->GetName() << endl | |
171 | << " you cannot call " << name << endl ; | |
172 | } | |
173 | else | |
174 | rv = (AliPHOSGeometry *) fgGeom ; | |
175 | } | |
176 | return rv ; | |
177 | } | |
4697edca | 178 | |
52a36ffd | 179 | //____________________________________________________________________________ |
180 | void AliPHOSGeometry::SetPHOSAngles() | |
181 | { | |
a4e98857 | 182 | // Calculates the position of the PHOS modules in ALICE global coordinate system |
52a36ffd | 183 | |
184 | Double_t const kRADDEG = 180.0 / kPI ; | |
ed4205d8 | 185 | Float_t pphi = 2 * TMath::ATan( GetOuterBoxSize(0) / ( 2.0 * GetIPtoOuterCoverDistance() ) ) ; |
52a36ffd | 186 | pphi *= kRADDEG ; |
ed4205d8 | 187 | if (pphi > fAngle) cout << "AliPHOSGeometry: PHOS modules overlap!\n"; |
188 | pphi = fAngle; | |
52a36ffd | 189 | |
190 | for( Int_t i = 1; i <= fNModules ; i++ ) { | |
ed4205d8 | 191 | Float_t angle = pphi * ( i - fNModules / 2.0 - 0.5 ) ; |
52a36ffd | 192 | fPHOSAngle[i-1] = - angle ; |
193 | } | |
d15a28e7 | 194 | } |
195 | ||
196 | //____________________________________________________________________________ | |
7b7c1533 | 197 | Bool_t AliPHOSGeometry::AbsToRelNumbering(const Int_t AbsId, Int_t * relid) const |
d15a28e7 | 198 | { |
b2a60966 | 199 | // Converts the absolute numbering into the following array/ |
200 | // relid[0] = PHOS Module number 1:fNModules | |
201 | // relid[1] = 0 if PbW04 | |
202 | // = PPSD Module number 1:fNumberOfModulesPhi*fNumberOfModulesZ*2 (2->up and bottom level) | |
203 | // relid[2] = Row number inside a PHOS or PPSD module | |
204 | // relid[3] = Column number inside a PHOS or PPSD module | |
d15a28e7 | 205 | |
206 | Bool_t rv = kTRUE ; | |
92862013 | 207 | Float_t id = AbsId ; |
d15a28e7 | 208 | |
92862013 | 209 | Int_t phosmodulenumber = (Int_t)TMath:: Ceil( id / ( GetNPhi() * GetNZ() ) ) ; |
d15a28e7 | 210 | |
52a36ffd | 211 | if ( phosmodulenumber > GetNModules() ) { // it is a PPSD or CPV pad |
212 | ||
213 | if ( strcmp(fName,"GPS2") == 0 ) { | |
214 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
215 | Float_t tempo = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
216 | relid[0] = (Int_t)TMath::Ceil( id / tempo ) ; | |
217 | id -= ( relid[0] - 1 ) * tempo ; | |
218 | relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ; | |
219 | id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
220 | relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ; | |
221 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ; | |
222 | } | |
223 | else if ( strcmp(fName,"IHEP") == 0 ) { | |
224 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
ed4205d8 | 225 | Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ; |
226 | relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ; | |
52a36ffd | 227 | relid[1] = 1 ; |
ed4205d8 | 228 | id -= ( relid[0] - 1 ) * nCPV ; |
229 | relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ; | |
230 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ; | |
231 | } | |
232 | else if ( strcmp(fName,"MIXT") == 0 ) { | |
233 | id -= GetNPhi() * GetNZ() * GetNModules() ; | |
234 | Float_t nPPSD = 2 * GetNumberOfModulesPhi() * GetNumberOfModulesZ() * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
235 | Float_t nCPV = GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() ; | |
236 | if (id <= nCPV*GetNCPVModules()) { // this pad belons to CPV | |
237 | relid[0] = (Int_t) TMath::Ceil( id / nCPV ) ; | |
238 | relid[1] = 1 ; | |
239 | id -= ( relid[0] - 1 ) * nCPV ; | |
240 | relid[2] = (Int_t) TMath::Ceil( id / GetNumberOfCPVPadsZ() ) ; | |
241 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() ) ; | |
242 | } | |
243 | else { // this pad belons to PPSD | |
244 | id -= nCPV*GetNCPVModules(); | |
245 | relid[0] = (Int_t)TMath::Ceil( id / nPPSD ); | |
246 | id -= ( relid[0] - 1 ) * nPPSD ; | |
247 | relid[0] += GetNCPVModules(); | |
248 | relid[1] = (Int_t)TMath::Ceil( id / ( GetNumberOfPadsPhi() * GetNumberOfPadsZ() ) ) ; | |
249 | id -= ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() ; | |
250 | relid[2] = (Int_t)TMath::Ceil( id / GetNumberOfPadsPhi() ) ; | |
251 | relid[3] = (Int_t) ( id - ( relid[2] - 1 ) * GetNumberOfPadsPhi() ) ; | |
252 | } | |
52a36ffd | 253 | } |
d15a28e7 | 254 | } |
255 | else { // its a PW04 crystal | |
256 | ||
92862013 | 257 | relid[0] = phosmodulenumber ; |
258 | relid[1] = 0 ; | |
259 | id -= ( phosmodulenumber - 1 ) * GetNPhi() * GetNZ() ; | |
260 | relid[2] = (Int_t)TMath::Ceil( id / GetNPhi() ) ; | |
261 | relid[3] = (Int_t)( id - ( relid[2] - 1 ) * GetNPhi() ) ; | |
d15a28e7 | 262 | } |
263 | return rv ; | |
264 | } | |
52a36ffd | 265 | |
9f616d61 | 266 | //____________________________________________________________________________ |
7b7c1533 | 267 | void AliPHOSGeometry::EmcModuleCoverage(const Int_t mod, Double_t & tm, Double_t & tM, Double_t & pm, Double_t & pM, Option_t * opt) const |
9f616d61 | 268 | { |
a4e98857 | 269 | // calculates the angular coverage in theta and phi of one EMC (=PHOS) module |
9f616d61 | 270 | |
271 | Double_t conv ; | |
cf0c2bc1 | 272 | if ( opt == Radian() ) |
9f616d61 | 273 | conv = 1. ; |
cf0c2bc1 | 274 | else if ( opt == Degre() ) |
9f616d61 | 275 | conv = 180. / TMath::Pi() ; |
276 | else { | |
277 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
278 | conv = 1. ; | |
279 | } | |
280 | ||
281 | Float_t phi = GetPHOSAngle(mod) * (TMath::Pi() / 180.) ; | |
92862013 | 282 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() |
9f616d61 | 283 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; |
284 | ||
92862013 | 285 | Double_t angle = TMath::ATan( GetCrystalSize(0)*GetNPhi() / (2 * y0) ) ; |
9f616d61 | 286 | phi = phi + 1.5 * TMath::Pi() ; // to follow the convention of the particle generator(PHOS is between 230 and 310 deg.) |
92862013 | 287 | Double_t max = phi - angle ; |
288 | Double_t min = phi + angle ; | |
289 | pM = TMath::Max(max, min) * conv ; | |
290 | pm = TMath::Min(max, min) * conv ; | |
9f616d61 | 291 | |
92862013 | 292 | angle = TMath::ATan( GetCrystalSize(2)*GetNZ() / (2 * y0) ) ; |
293 | max = TMath::Pi() / 2. + angle ; // to follow the convention of the particle generator(PHOS is at 90 deg.) | |
294 | min = TMath::Pi() / 2. - angle ; | |
295 | tM = TMath::Max(max, min) * conv ; | |
296 | tm = TMath::Min(max, min) * conv ; | |
9f616d61 | 297 | |
298 | } | |
299 | ||
300 | //____________________________________________________________________________ | |
7b7c1533 | 301 | void AliPHOSGeometry::EmcXtalCoverage(Double_t & theta, Double_t & phi, Option_t * opt) const |
9f616d61 | 302 | { |
a4e98857 | 303 | // calculates the angular coverage in theta and phi of a single crystal in a EMC(=PHOS) module |
9f616d61 | 304 | |
305 | Double_t conv ; | |
cf0c2bc1 | 306 | if ( opt == Radian() ) |
9f616d61 | 307 | conv = 1. ; |
cf0c2bc1 | 308 | else if ( opt == Degre() ) |
9f616d61 | 309 | conv = 180. / TMath::Pi() ; |
310 | else { | |
311 | cout << "<I> AliPHOSGeometry::EmcXtalCoverage : " << opt << " unknown option; result in radian " << endl ; | |
312 | conv = 1. ; | |
313 | } | |
314 | ||
92862013 | 315 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() |
9f616d61 | 316 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; |
92862013 | 317 | theta = 2 * TMath::ATan( GetCrystalSize(2) / (2 * y0) ) * conv ; |
318 | phi = 2 * TMath::ATan( GetCrystalSize(0) / (2 * y0) ) * conv ; | |
9f616d61 | 319 | } |
320 | ||
321 | ||
322 | //____________________________________________________________________________ | |
52a36ffd | 323 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos, TMatrix & gmat) const |
d15a28e7 | 324 | { |
a4e98857 | 325 | // Calculates the coordinates of a RecPoint and the error matrix in the ALICE global coordinate system |
b2a60966 | 326 | |
d15a28e7 | 327 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 328 | TVector3 localposition ; |
d15a28e7 | 329 | |
330 | tmpPHOS->GetLocalPosition(gpos) ; | |
331 | ||
332 | ||
333 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
334 | { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() + | |
335 | GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ; | |
336 | ||
337 | } | |
338 | else | |
339 | { // it is a PPSD pad | |
340 | AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ; | |
341 | if (tmpPpsd->GetUp() ) // it is an upper module | |
342 | { | |
343 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - | |
344 | GetLeadToMicro2Gap() - GetLeadConverterThickness() - | |
345 | GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ; | |
346 | } | |
347 | else // it is a lower module | |
348 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ; | |
349 | } | |
350 | ||
92862013 | 351 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
352 | Double_t const kRADDEG = 180.0 / kPI ; | |
353 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 354 | |
92862013 | 355 | TRotation rot ; |
356 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 357 | |
92862013 | 358 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
359 | gpos.Transform(rot) ; // rotate the baby | |
6ad0bfa0 | 360 | |
d15a28e7 | 361 | } |
362 | ||
363 | //____________________________________________________________________________ | |
5cda30f6 | 364 | void AliPHOSGeometry::GetGlobal(const AliRecPoint* RecPoint, TVector3 & gpos) const |
d15a28e7 | 365 | { |
a4e98857 | 366 | // Calculates the coordinates of a RecPoint in the ALICE global coordinate system |
b2a60966 | 367 | |
d15a28e7 | 368 | AliPHOSRecPoint * tmpPHOS = (AliPHOSRecPoint *) RecPoint ; |
92862013 | 369 | TVector3 localposition ; |
d15a28e7 | 370 | tmpPHOS->GetLocalPosition(gpos) ; |
371 | ||
372 | ||
373 | if ( tmpPHOS->IsEmc() ) // it is a EMC crystal | |
374 | { gpos.SetY( -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() + | |
375 | GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ) ; | |
376 | } | |
377 | else | |
378 | { // it is a PPSD pad | |
379 | AliPHOSPpsdRecPoint * tmpPpsd = (AliPHOSPpsdRecPoint *) RecPoint ; | |
380 | if (tmpPpsd->GetUp() ) // it is an upper module | |
381 | { | |
382 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - | |
383 | GetLeadToMicro2Gap() - GetLeadConverterThickness() - | |
384 | GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0 ) ) ; | |
385 | } | |
386 | else // it is a lower module | |
387 | gpos.SetY(-( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ) ; | |
388 | } | |
389 | ||
92862013 | 390 | Float_t phi = GetPHOSAngle( tmpPHOS->GetPHOSMod()) ; |
391 | Double_t const kRADDEG = 180.0 / kPI ; | |
392 | Float_t rphi = phi / kRADDEG ; | |
d15a28e7 | 393 | |
92862013 | 394 | TRotation rot ; |
395 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
d15a28e7 | 396 | |
92862013 | 397 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame |
398 | gpos.Transform(rot) ; // rotate the baby | |
d15a28e7 | 399 | } |
400 | ||
401 | //____________________________________________________________________________ | |
7b7c1533 | 402 | void AliPHOSGeometry::ImpactOnEmc(const Double_t theta, const Double_t phi, Int_t & ModuleNumber, Double_t & z, Double_t & x) const |
d15a28e7 | 403 | { |
a4e98857 | 404 | // calculates the impact coordinates on PHOS of a neutral particle |
405 | // emitted in the direction theta and phi in the ALICE global coordinate system | |
d15a28e7 | 406 | |
52a36ffd | 407 | // searches for the PHOS EMC module |
408 | ModuleNumber = 0 ; | |
409 | Double_t tm, tM, pm, pM ; | |
410 | Int_t index = 1 ; | |
411 | while ( ModuleNumber == 0 && index <= GetNModules() ) { | |
412 | EmcModuleCoverage(index, tm, tM, pm, pM) ; | |
413 | if ( (theta >= tm && theta <= tM) && (phi >= pm && phi <= pM ) ) | |
414 | ModuleNumber = index ; | |
415 | index++ ; | |
d15a28e7 | 416 | } |
52a36ffd | 417 | if ( ModuleNumber != 0 ) { |
418 | Float_t phi0 = GetPHOSAngle(ModuleNumber) * (TMath::Pi() / 180.) + 1.5 * TMath::Pi() ; | |
419 | Float_t y0 = GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
420 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness() ; | |
421 | Double_t angle = phi - phi0; | |
422 | x = y0 * TMath::Tan(angle) ; | |
423 | angle = theta - TMath::Pi() / 2 ; | |
424 | z = y0 * TMath::Tan(angle) ; | |
d15a28e7 | 425 | } |
d15a28e7 | 426 | } |
427 | ||
428 | //____________________________________________________________________________ | |
7b7c1533 | 429 | Bool_t AliPHOSGeometry::RelToAbsNumbering(const Int_t * relid, Int_t & AbsId) const |
d15a28e7 | 430 | { |
b2a60966 | 431 | // Converts the relative numbering into the absolute numbering |
ed4205d8 | 432 | // EMCA crystals: |
433 | // AbsId = from 1 to fNModules * fNPhi * fNZ | |
434 | // PPSD gas cell: | |
435 | // AbsId = from N(total EMCA crystals) + 1 | |
436 | // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ + | |
437 | // fNModules * 2 * (fNumberOfModulesPhi * fNumberOfModulesZ) * fNumberOfPadsPhi * fNumberOfPadsZ | |
438 | // CPV pad: | |
439 | // AbsId = from N(total PHOS crystals) + 1 | |
440 | // to NCPVModules * fNumberOfCPVPadsPhi * fNumberOfCPVPadsZ | |
d15a28e7 | 441 | |
442 | Bool_t rv = kTRUE ; | |
443 | ||
ed4205d8 | 444 | if ( relid[1] > 0 && strcmp(fName,"GPS2")==0) { // it is a PPSD pad |
445 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from PPSD pads | |
446 | + ( relid[0] - 1 ) * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PPSD modules | |
d15a28e7 | 447 | * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2 |
ed4205d8 | 448 | + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules |
449 | + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row | |
450 | + relid[3] ; // the column number | |
451 | } | |
452 | ||
453 | else if ( relid[1] > 0 && strcmp(fName,"MIXT")==0) { // it is a PPSD pad | |
454 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from PPSD pads | |
455 | + GetNCPVModules() * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of CPV modules if any | |
456 | + ( relid[0] - 1 - GetNCPVModules()) | |
457 | * GetNumberOfModulesPhi() * GetNumberOfModulesZ() // the pads offset of PPSD modules | |
458 | * GetNumberOfPadsPhi() * GetNumberOfPadsZ() * 2 | |
459 | + ( relid[1] - 1 ) * GetNumberOfPadsPhi() * GetNumberOfPadsZ() // the pads offset of PPSD modules | |
460 | + ( relid[2] - 1 ) * GetNumberOfPadsPhi() // the pads offset of a PPSD row | |
461 | + relid[3] ; // the column number | |
d15a28e7 | 462 | } |
52a36ffd | 463 | |
464 | else if ( relid[1] == 0 ) { // it is a Phos crystal | |
465 | AbsId = | |
466 | ( relid[0] - 1 ) * GetNPhi() * GetNZ() // the offset of PHOS modules | |
467 | + ( relid[2] - 1 ) * GetNPhi() // the offset of a xtal row | |
468 | + relid[3] ; // the column number | |
d15a28e7 | 469 | } |
470 | ||
52a36ffd | 471 | else if ( relid[1] == -1 ) { // it is a CPV pad |
472 | AbsId = GetNPhi() * GetNZ() * GetNModules() // the offset to separate EMCA crystals from CPV pads | |
ed4205d8 | 473 | + ( relid[0] - 1 ) * GetNumberOfCPVPadsPhi() * GetNumberOfCPVPadsZ() // the pads offset of PHOS modules |
474 | + ( relid[2] - 1 ) * GetNumberOfCPVPadsZ() // the pads offset of a CPV row | |
52a36ffd | 475 | + relid[3] ; // the column number |
476 | } | |
477 | ||
d15a28e7 | 478 | return rv ; |
479 | } | |
480 | ||
481 | //____________________________________________________________________________ | |
482 | ||
7b7c1533 | 483 | void AliPHOSGeometry::RelPosInAlice(const Int_t id, TVector3 & pos ) const |
d15a28e7 | 484 | { |
a4e98857 | 485 | // Converts the absolute numbering into the global ALICE coordinate system |
ed4205d8 | 486 | // It works only for the GPS2 geometry |
b2a60966 | 487 | |
ed4205d8 | 488 | if (id > 0 && strcmp(fName,"GPS2")==0) { |
489 | ||
490 | Int_t relid[4] ; | |
491 | ||
492 | AbsToRelNumbering(id , relid) ; | |
493 | ||
494 | Int_t phosmodule = relid[0] ; | |
495 | ||
496 | Float_t y0 = 0 ; | |
497 | ||
498 | if ( relid[1] == 0 ) { // it is a PbW04 crystal | |
499 | y0 = -(GetIPtoOuterCoverDistance() + GetUpperPlateThickness() | |
500 | + GetSecondUpperPlateThickness() + GetUpperCoolingPlateThickness()) ; | |
501 | } | |
502 | if ( relid[1] > 0 ) { // its a PPSD pad | |
503 | if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) { // its an bottom module | |
504 | y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() / 2.0) ; | |
505 | } | |
506 | else // its an upper module | |
507 | y0 = -( GetIPtoOuterCoverDistance() - GetMicromegas2Thickness() - GetLeadToMicro2Gap() | |
508 | - GetLeadConverterThickness() - GetMicro1ToLeadGap() - GetMicromegas1Thickness() / 2.0) ; | |
509 | } | |
510 | ||
511 | Float_t x, z ; | |
512 | RelPosInModule(relid, x, z) ; | |
513 | ||
514 | pos.SetX(x) ; | |
515 | pos.SetZ(z) ; | |
9cc0fcba | 516 | pos.SetY(- TMath::Sqrt(x*x + z*z + y0*y0) ) ; |
ed4205d8 | 517 | |
518 | ||
519 | ||
520 | Float_t phi = GetPHOSAngle( phosmodule) ; | |
521 | Double_t const kRADDEG = 180.0 / kPI ; | |
522 | Float_t rphi = phi / kRADDEG ; | |
523 | ||
524 | TRotation rot ; | |
525 | rot.RotateZ(-rphi) ; // a rotation around Z by angle | |
526 | ||
527 | TRotation dummy = rot.Invert() ; // to transform from original frame to rotate frame | |
528 | ||
9cc0fcba | 529 | cout << "before X,Y,Z " << pos.X() << endl << pos.Y() << endl << pos.Z() << endl; |
ed4205d8 | 530 | pos.Transform(rot) ; // rotate the baby |
9cc0fcba | 531 | cout << "X,Y,Z " << pos.X() << endl << pos.Y() << endl << pos.Z() << endl; |
d15a28e7 | 532 | } |
533 | else { | |
ed4205d8 | 534 | pos.SetX(0.); |
535 | pos.SetY(0.); | |
536 | pos.SetZ(0.); | |
537 | } | |
d15a28e7 | 538 | } |
539 | ||
540 | //____________________________________________________________________________ | |
7b7c1533 | 541 | void AliPHOSGeometry::RelPosInModule(const Int_t * relid, Float_t & x, Float_t & z) const |
d15a28e7 | 542 | { |
b2a60966 | 543 | // Converts the relative numbering into the local PHOS-module (x, z) coordinates |
52a36ffd | 544 | // Note: sign of z differs from that in the previous version (Yu.Kharlov, 12 Oct 2000) |
ed4205d8 | 545 | |
546 | Bool_t padOfCPV = (strcmp(fName,"IHEP")==0) || | |
547 | ((strcmp(fName,"MIXT")==0) && relid[0]<=GetNCPVModules()) ; | |
548 | Bool_t padOfPPSD = (strcmp(fName,"GPS2")==0) || | |
549 | ((strcmp(fName,"MIXT")==0) && relid[0]> GetNCPVModules()) ; | |
b2a60966 | 550 | |
92862013 | 551 | Int_t ppsdmodule ; |
a3dfe79c | 552 | Float_t x0,z0; |
52a36ffd | 553 | Int_t row = relid[2] ; //offset along x axiz |
554 | Int_t column = relid[3] ; //offset along z axiz | |
d15a28e7 | 555 | |
ed4205d8 | 556 | Float_t padsizeZ = 0; |
557 | Float_t padsizeX = 0; | |
558 | Int_t nOfPadsPhi = 0; | |
559 | Int_t nOfPadsZ = 0; | |
560 | if ( padOfPPSD ) { | |
561 | padsizeZ = GetPPSDModuleSize(2) / GetNumberOfPadsZ(); | |
562 | padsizeX = GetPPSDModuleSize(0) / GetNumberOfPadsPhi(); | |
563 | nOfPadsPhi = GetNumberOfPadsPhi(); | |
564 | nOfPadsZ = GetNumberOfPadsZ(); | |
565 | } | |
566 | else if ( padOfCPV ) { | |
567 | padsizeZ = GetPadSizeZ(); | |
568 | padsizeX = GetPadSizePhi(); | |
569 | nOfPadsPhi = GetNumberOfCPVPadsPhi(); | |
570 | nOfPadsZ = GetNumberOfCPVPadsZ(); | |
571 | } | |
572 | ||
92862013 | 573 | if ( relid[1] == 0 ) { // its a PbW04 crystal |
52a36ffd | 574 | x = - ( GetNPhi()/2. - row + 0.5 ) * GetCrystalSize(0) ; // position ox Xtal with respect |
575 | z = ( GetNZ() /2. - column + 0.5 ) * GetCrystalSize(2) ; // of center of PHOS module | |
576 | } | |
577 | else { | |
ed4205d8 | 578 | if ( padOfPPSD ) { |
579 | if ( relid[1] > GetNumberOfModulesPhi() * GetNumberOfModulesZ() ) | |
580 | ppsdmodule = relid[1]-GetNumberOfModulesPhi() * GetNumberOfModulesZ(); | |
581 | else | |
582 | ppsdmodule = relid[1] ; | |
583 | Int_t modrow = 1+(Int_t)TMath::Ceil( (Float_t)ppsdmodule / GetNumberOfModulesPhi()-1. ) ; | |
584 | Int_t modcol = ppsdmodule - ( modrow - 1 ) * GetNumberOfModulesPhi() ; | |
a3dfe79c | 585 | x0 = ( GetNumberOfModulesPhi() / 2. - modrow + 0.5 ) * GetPPSDModuleSize(0) ; |
586 | z0 = ( GetNumberOfModulesZ() / 2. - modcol + 0.5 ) * GetPPSDModuleSize(2) ; | |
587 | } else { | |
588 | x0 = 0; | |
589 | z0 = 0; | |
590 | } | |
ed4205d8 | 591 | x = - ( nOfPadsPhi/2. - row - 0.5 ) * padsizeX + x0 ; // position of pad with respect |
592 | z = ( nOfPadsZ /2. - column - 0.5 ) * padsizeZ - z0 ; // of center of PHOS module | |
52a36ffd | 593 | } |
2f3366b6 | 594 | } |