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 **************************************************************************/
17 //_________________________________________________________________________
18 // Implementation version v0 of EMCAL Manager class
19 // An object of this class does not produce hits nor digits
20 // It is the one to use if you do not want to produce outputs in TREEH or TREED
21 // This class places a Geometry of the EMCAL in the ALICE Detector as defined in AliEMCALGeometry.cxx
22 //*-- Author: Yves Schutz (SUBATECH)
23 //*-- and : Sahal Yacoob (LBL / UCT)
25 // This Version of AliEMCALv0 reduces the number of volumes placed in XEN1 (the envelope) to less than five hundred
26 // The Envelope is Placed in Alice, And the Aluminium layer. Mini envelopes (XU) are then placed in XEN1.
27 // Each mini envelope contains 2 scintillator, and 2 lead layers, except the last one which contains just one scintillator layer.
28 // At the moment I cannot place the 36 and above layers in the mini envelopes so all layers are still placed in XEN1
31 // --- ROOT system ---
37 #include "TGeometry.h"
39 // --- Standard library ---
44 #include <Rstrstream.h>
45 #include <Riostream.h>
47 // --- AliRoot header files ---
49 #include "AliEMCALv0.h"
50 #include "AliEMCALGeometry.h"
56 //______________________________________________________________________
57 AliEMCALv0::AliEMCALv0(const char *name, const char *title):
60 // ctor : title is used to identify the layout
65 //______________________________________________________________________
66 void AliEMCALv0::BuildGeometry()
68 // Display Geometry for display.C
70 const Int_t kColorArm1 = kBlue ;
72 AliEMCALGeometry * geom = GetGeometry() ;
74 // Define the shape of the Calorimeter
75 TNode * top = gAlice->GetGeometry()->GetNode("alice") ;
76 new TTUBS("Envelop1", "Tubs that contains arm 1", "void",
77 geom->GetEnvelop(0), // rmin
78 geom->GetEnvelop(1) +30 , // rmax
79 geom->GetEnvelop(2)/2.0, // half length in Z
80 geom->GetArm1PhiMin(), // minimun phi angle
81 geom->GetArm1PhiMax() // maximun phi angle
86 TNode * envelop1node = new TNode("Envelop1", "Arm1 Envelop", "Envelop1"
88 envelop1node->SetLineColor(kColorArm1) ;
89 fNodes->Add(envelop1node) ;
92 //______________________________________________________________________
93 void AliEMCALv0::CreateGeometry()
95 // Create the EMCAL geometry for Geant
96 // Geometry of a tower
97 //|-----------------------------------------------------| XEN1
99 //| | Al thickness = GetAlFrontThickness() | |
103 //| ------------------------------------------------- |
104 //| | Air Gap = GetGap2Active() | |
106 //| ------------------------------------------------- |
107 //| | XU0 : XPST (PreShower e = GetPreSintThick() )| |
108 //| ------------------------------------------------- |
109 //| | XU0 : XPBX (PreShower e = GetPbRadThick() ) | |
110 //| ------------------------------------------------- |
111 //| | XU0 : XPST (PreShower e = GetPreSintThick() )| |
112 //| ------------------------------------------------- |
113 //| | XU0 : XPBX (PreShower e = GetPbRadThick() ) | |
114 //| ------------------------------------------------- |
115 //| | XU1 : XPST (Tower e = GetFullSintThick() ) | |
116 //| ------------------------------------------------- |
117 //| | XU1 : XPBX (Tower e = GetPbRadThick() ) | |
118 //| ------------------------------------------------- |
119 //| | XU1 : XPST (Tower e = GetFullSintThick() | |
120 //| ------------------------------------------------- |
121 //| | XU1 : XPBX (Tower e = GetPbRadThick() ) | |
122 //| ------------------------------------------------- |
124 //| ------------------------------------------------- |
125 //| | XU10 : XPST (Tower e = GetFullSintThick() ) | |
126 //|-----------------------------------------------------|
128 Float_t etamin,etamax;
131 AliEMCALGeometry * geom = GetGeometry() ;
133 if(!(geom->IsInitialized())){
134 Error("CreateGeometry","EMCAL Geometry class has not been set up.");
137 // Get pointer to the array containing media indices
138 Int_t *idtmed = fIdtmed->GetArray() - 1599 ;
141 AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ;
145 // Create the EMCAL Mother Volume (a polygone) within which to place the Detector and named XEN1
147 Float_t envelopA[10];
148 envelopA[0] = geom->GetArm1PhiMin(); // minimum phi angle
149 envelopA[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin(); // angular range in phi
150 envelopA[2] = geom->GetNPhi(); // number of sections in phi
151 envelopA[3] = 2; // 2 z coordinates
152 envelopA[4] = geom->ZFromEtaR(geom->GetEnvelop(1),
153 geom->GetArm1EtaMin()); // z coordinate 1
154 envelopA[5] = geom->GetEnvelop(0) ; // rmin at z1
155 envelopA[6] = geom->GetEnvelop(1) ; // rmax at z1
156 envelopA[7] = geom->ZFromEtaR(geom->GetEnvelop(1),
157 geom->GetArm1EtaMax()); // z coordinate 2
158 envelopA[8] = envelopA[5] ; // radii are the same.
159 envelopA[9] = envelopA[6] ; // radii are the same.
161 gMC->Gsvolu("XEN1", "PGON ", idtmed[1599], envelopA, 10) ; // Polygone filled with air
163 // Position the EMCAL Mother Volume (XEN1) in Alice (ALIC)
165 gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
168 Info("CreateGeometry","rXEN1 = %f, %f\n", envelopA[5], envelopA[6]);
170 // Create mini-envelopes which will contain the PreShower scintillator-Lead-scintillator-lead
173 Info("CreateGeometry","XU0 = %f, %f\n", envelopA[5], envelopA[6]);
175 // Create mini-envelopes which will contain the Tower scintillator-radiator-scintillator-radiator
179 envelopA[5] = envelopA[5] + geom->GetGap2Active() // we are at the first scintllator
180 + geom->GetAlFrontThickness(); // rmin at z1
181 envelopA[6] = envelopA[5] ;
186 Int_t nLayers = geom->GetNPRLayers() + geom->GetNECLayers() + geom->GetNHCLayers() ;
188 for (i = 0; i < nLayers/2 ; i++ ){
193 tseg = 2 *(geom->GetPreSintThick()+geom->GetPbRadThick()); // thickness of 2 * scintillator+Pb in pre shower
194 else if ( i <= geom->GetNECLayers()/2)
195 tseg = 2* (geom->GetFullSintThick()+geom->GetPbRadThick()); // thickness of 2 * scintillator+Pb in E Cal
197 tseg = 2* (geom->GetFullSintThick()+geom->GetCuRadThick()); // thickness of 2 * scintillator+Cu in H Cal
198 envelopA[5] = envelopA[6] ; // rmin at z1
199 envelopA[4] = geom->ZFromEtaR(envelopA[5] + tseg,
200 geom->GetArm1EtaMin()); // z coordinate 1
201 envelopA[7] = geom->ZFromEtaR(envelopA[5] + tseg,
202 geom->GetArm1EtaMax()); // z coordinate 2
203 envelopA[6] = envelopA[5] + tseg ; // rmax at z1
204 envelopA[8] = envelopA[5] ; // radii are the same.
205 envelopA[9] = envelopA[6] ; // radii are the same.
207 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
209 // Position XUi in XEN1
211 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
214 Info("CreateGeometry","XU%d = %f, %f\n", i, envelopA[5], envelopA[6]);
219 // Create one mini-envelope which will contain the last Tower scintillator (XU(nlayers-1)/2)
223 envelopA[5] = envelopA[6] ; // rmin at z1
224 envelopA[4] = geom->ZFromEtaR(envelopA[5],
225 geom->GetArm1EtaMin()); // z coordinate 1
226 envelopA[7] = geom->ZFromEtaR(envelopA[5],
227 geom->GetArm1EtaMax()); // z coordinate 2
228 envelopA[6] = envelopA[5] + geom->GetFullSintThick() ; // rmax at z1
229 envelopA[8] = envelopA[5] ; // radii are the same.
230 envelopA[9] = envelopA[6] ; // radii are the same.
232 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10); // Polygone filled with air
234 // Position the last minienvelope in XEN1
236 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
239 Info("CreateGeometry","XEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
241 // Create the shapes of active material (LEAD/Aluminium/Scintillator)
243 Float_t envelopB[10]; // First Layer of Aluminium
244 Float_t envelopC[10]; // Scintillator Layers
245 Float_t envelopD[10]; // Lead Layers
247 envelopC[0] = envelopD[0] = envelopB[0] = envelopA[0] ; // starting position in Phi
248 envelopC[1] = envelopD[1] = envelopB[1] = envelopA[1] ; // angular range in phi
249 envelopC[2] = envelopD[2] = envelopB[2] = envelopA[2] ; // number of sections in Phi
250 envelopD[3] = envelopC[3] = envelopB[3] = envelopA[3] ; // 2 z coordinates
252 Float_t dist = geom->GetEnvelop(0) + geom->GetAlFrontThickness() + geom->GetGap2Active() ;
253 envelopB[4] = geom->ZFromEtaR(dist,
254 geom->GetArm1EtaMin()); // z co-ordinate 1
255 envelopB[5] = geom->GetEnvelop(0) ; // rmin at z1
256 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();// rmax at z1
257 envelopB[7] = geom->ZFromEtaR(dist,
258 geom->GetArm1EtaMax()); // z co-ordinate 2
259 envelopB[8] = envelopB[5] ; // radii are the same.
260 envelopB[9] = envelopB[6] ; // radii are the same.
262 // Define active volumes completely
264 gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10); // PGON filled with Al
266 gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ; // Position Aluminium Layer in XEN1
268 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0); // PGON filled with Scintillator (shape to be defined by GSPOSP)
270 gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0); // PGON filled with Lead (shape to be defined by GSPOSP)
272 gMC->Gsvolu("XCUX", "PGON", idtmed[1603], dum, 0); // PGON filled with Copper (shape to be defined by GSPOSP)
274 gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2); // Divide eta section of scintillators into phi segments.
276 // Position alternatively scintillator and Lead Layers in XUi.
278 envelopD[6] = envelopB[6] + geom->GetGap2Active() ;// gap between Al layer and XU0
280 for (int i = 0; i < nLayers; i++ ){
282 label += static_cast<Int_t> (i/2) ; // we will place two layers (i = one layer) in each mini envelope)
284 Float_t scthick ; // scintillator thickness
285 if ( i < geom->GetNPRLayers() ) // its a preshower
286 scthick = geom->GetPreSintThick() ;
287 else if( i < geom->GetNPRLayers() + geom->GetNECLayers() ) // its an EMCAL section
288 scthick = geom->GetFullSintThick() ;
289 else // its an HCAL section
290 scthick = geom->GetFullSintThick() ;
292 envelopC[5] = envelopD[6] ; //rmin
293 envelopC[6] = envelopC[5] + scthick ; //rmax
294 envelopC[8] = envelopC[5] ; //rmin
295 envelopC[9] = envelopC[6] ; //rmax
298 // envelopC[6] = envelopD[6] + ((i > 1) ? geom->GetFullSintThick() : geom->GetPreSintThick());//rmax larger for first two layers (preshower)
299 // envelopC[9] = envelopD[6] + ((i > 1 ) ? geom->GetFullSintThick() :geom->GetPreSintThick());//rmax larger for first two layers (preshower)
302 Info("CreateGeometry", "volume = %s, name = XPST thickness = %f deb = %f/%f fin = %f/%f", label.Data(), scthick, envelopC[5], envelopC[8], envelopC[6], envelopC[9]) ;
304 for (int j =0; j < (geom->GetNEta()) ; j++){
305 etamin = geom->GetArm1EtaMin()+
306 (j*geom->GetDeltaEta());
307 etamax = geom->GetArm1EtaMin()+
308 ((j+1)*geom->GetDeltaEta());
309 envelopC[4] = geom->ZFromEtaR(envelopC[5],etamin); //z begin
310 envelopC[7] = geom->ZFromEtaR(envelopC[5],etamax);// z end
312 gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(),
313 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
317 Float_t radthick ; // radiator thickness
318 TString radname ; // radiator name
319 if ( i <= 1 ) { // its a preshower
320 radthick = geom->GetPbRadThick();
323 else if( i <= geom->GetNECLayers()) {// its an EMCAL section
324 radthick = geom->GetPbRadThick();
327 else { // its an HCAL section
328 radthick = geom->GetCuRadThick();
332 if ( i < nLayers -1 ) { // except for the last XU which contains only one scintillator layer
334 envelopD[5] = envelopC[6] ; //rmin
335 envelopD[8] = envelopD[5] ; //rmin
336 envelopD[6] = envelopD[5] + radthick ; // rmax
337 // envelopD[6] = envelopC[6] + geom->GetPbRadThick(); //rmax
338 envelopD[9] = envelopD[6] ; //rmax
339 // envelopD[9] = envelopC[6] + geom->GetPbRadThick(); //rmax
342 Info("CreateGeometry", "volume = %s, name = %s thickness = %f deb = %f/%f fin = %f/%f", label.Data(), radname.Data(), radthick, envelopD[5], envelopD[8], envelopD[6], envelopD[9]) ;
344 for (int j =0; j < (geom->GetNEta()) ; j++){
345 etamin = geom->GetArm1EtaMin()+
346 (j*geom->GetDeltaEta());
347 etamax = geom->GetArm1EtaMin()+
348 ((j+1)*geom->GetDeltaEta());
349 envelopD[4] = geom->ZFromEtaR(envelopD[5],etamin);//z begin
350 envelopD[7] = geom->ZFromEtaR(envelopD[5],etamax);// z end
352 // Position and Define Layer
354 gMC->Gsposp(radname.Data(),1+j+i*(geom->GetNEta()), label.Data(),
355 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);
357 } // if not last layer
362 //______________________________________________________________________
363 void AliEMCALv0::Init(void)
365 // Just prints an information message
368 TString message("\n") ;
369 message += "*****************************************\n" ;
371 // Here the EMCAL initialisation code (if any!)
373 AliEMCALGeometry * geom = GetGeometry() ;
376 message += "AliEMCAL " ;
377 message += Version() ;
378 message += "EMCAL geometry initialized for " ;
379 message += geom->GetName() ;
382 message += "AliEMCAL " ;
383 message += Version() ;
384 message += "EMCAL geometry initialization failed !" ;
386 message += "\n*****************************************" ;
387 Info("Init", message.Data() ) ;