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) ;
144 // Create the EMCAL Mother Volume (a polygone) within which to place the Detector and named XEN1
146 Float_t envelopA[10];
147 envelopA[0] = geom->GetArm1PhiMin(); // minimum phi angle
148 envelopA[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin(); // angular range in phi
149 envelopA[2] = geom->GetNPhi(); // number of sections in phi
150 envelopA[3] = 2; // 2 z coordinates
151 envelopA[4] = geom->ZFromEtaR(geom->GetEnvelop(0),
152 geom->GetArm1EtaMin()); // z coordinate 1
153 envelopA[5] = geom->GetEnvelop(0) ; // rmin at z1
154 envelopA[6] = geom->GetEnvelop(1) ; // rmax at z1
155 envelopA[7] = geom->ZFromEtaR(geom->GetEnvelop(0),
156 geom->GetArm1EtaMax()); // z coordinate 2
157 envelopA[8] = envelopA[5] ; // radii are the same.
158 envelopA[9] = envelopA[6] ; // radii are the same.
160 gMC->Gsvolu("XEN1", "PGON ", idtmed[1599], envelopA, 10) ; // Polygone filled with air
162 // Position the EMCAL Mother Volume (XEN1) in Alice (ALIC)
164 gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
167 Info("CreateGeometry","rXEN1 = %f, %f\n", envelopA[5], envelopA[6]);
169 // Create mini-envelopes which will contain the PreShower scintillator-Lead-scintillator-lead (XU0)
171 TString label = "XU0";
173 envelopA[5] = envelopA[5] + geom->GetGap2Active()
174 + geom->GetAlFrontThickness(); // rmin at z1
175 envelopA[4] = geom->ZFromEtaR(envelopA[5],
176 geom->GetArm1EtaMin()); // z coordinate 1
177 envelopA[7] = geom->ZFromEtaR(envelopA[5],
178 geom->GetArm1EtaMax()); // z coordinate 2
179 envelopA[6] = envelopA[5] + 2 * (geom->GetPreSintThick()
180 + geom->GetPbRadThick() ); // rmax at z1
181 envelopA[8] = envelopA[5] ; // radii are the same.
182 envelopA[9] = envelopA[6] ; // radii are the same.
184 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
186 // Position XU0 in XEN1
188 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY");
191 Info("CreateGeometry","rXU0 = %f, %f\n", envelopA[5], envelopA[6]);
193 // Create mini-envelopes which will contain the Tower scintillator-Lead-scintillator-lead (XU1 -> XU9)
195 Float_t tseg = geom->GetFullSintThick()+geom->GetPbRadThick(); // thickness of scintillator+Pb
198 for (i = 1; i < ((geom->GetNLayers()-2)/2) + 1 ; i++ ){
201 envelopA[5] = envelopA[6] ; // rmin at z1
202 envelopA[4] = geom->ZFromEtaR(envelopA[5],
203 geom->GetArm1EtaMin()); // z coordinate 1
204 envelopA[7] = geom->ZFromEtaR(envelopA[5],
205 geom->GetArm1EtaMax()); // z coordinate 2
206 envelopA[6] = envelopA[5] + 2 * tseg ; // rmax at z1
207 envelopA[8] = envelopA[5] ; // radii are the same.
208 envelopA[9] = envelopA[6] ; // radii are the same.
210 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
212 // Position XUi in XEN1
214 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
217 Info("CreateGeometry","rXEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
222 // Create one mini-envelope which will contain the last Tower scintillator (XU(nlayers-1)/2)
224 tseg = geom->GetFullSintThick() ;
227 envelopA[5] = envelopA[6] ; // rmin at z1
228 envelopA[4] = geom->ZFromEtaR(envelopA[5],
229 geom->GetArm1EtaMin()); // z coordinate 1
230 envelopA[7] = geom->ZFromEtaR(envelopA[5],
231 geom->GetArm1EtaMax()); // z coordinate 2
232 envelopA[6] = envelopA[5] + tseg ; // rmax at z1
233 envelopA[8] = envelopA[5] ; // radii are the same.
234 envelopA[9] = envelopA[6] ; // radii are the same.
236 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10); // Polygone filled with air
238 // Position XU10 in XEN1
240 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
243 Info("CreateGeometry","rXEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
245 // Create the shapes of active material (LEAD/Aluminium/Scintillator)
247 Float_t envelopB[10]; // First Layer of Aluminium
248 Float_t envelopC[10]; // Scintillator Layers
249 Float_t envelopD[10]; // Lead Layers
251 envelopC[0] = envelopD[0] = envelopB[0] = envelopA[0] ; // starting position in Phi
252 envelopC[1] = envelopD[1] = envelopB[1] = envelopA[1] ; // angular range in phi
253 envelopC[2] = envelopD[2] = envelopB[2] = envelopA[2] ; // number of sections in Phi
254 envelopD[3] = envelopC[3] = envelopB[3] = envelopA[3] ; // 2 z coordinates
256 envelopB[4] = geom->ZFromEtaR(geom->GetEnvelop(0),
257 geom->GetArm1EtaMin()); // z co-ordinate 1
258 envelopB[5] = geom->GetEnvelop(0) ; // rmin at z1
259 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();// rmax at z1
260 envelopB[7] = geom->ZFromEtaR(geom->GetEnvelop(0),
261 geom->GetArm1EtaMax()); // z co-ordinate 2
262 envelopB[8] = envelopB[5] ; // radii are the same.
263 envelopB[9] = envelopB[6] ; // radii are the same.
265 // Define active volumes completely
267 gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10); // PGON filled with Al
269 gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ; // Position Aluminium Layer in XEN1
271 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0); // PGON filled with Scintillator (shape to be defined by GSPOSP)
273 gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0); // PGON filled with Lead (shape to be defined by GSPOSP)
275 gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2); // Divide eta section of scintillators into phi segments.
277 // Position alternatively scintillator and Lead Layers in XUi.
279 envelopD[6] = envelopB[6] + geom->GetGap2Active() ;// gap between Al layer and XU0
281 for (int i = 0; i < geom->GetNLayers() ; i++ ){
283 label += static_cast<Int_t> (i/2) ; // we will place two layers (i = one layer) in each mini envelope)
284 envelopC[5] = envelopD[6] ; //rmin
285 envelopC[6] = envelopD[6] + ((i > 1) ? geom->GetFullSintThick() :
286 geom->GetPreSintThick());//rmax larger for first two layers (preshower)
287 envelopC[8] = envelopD[6] ; //rmin
288 envelopC[9] = envelopD[6] + ((i > 1 ) ? geom->GetFullSintThick() :
289 geom->GetPreSintThick());//rmax larger for first two layers (preshower)
290 for (int j =0; j < (geom->GetNEta()) ; j++){
291 etamin = geom->GetArm1EtaMin()+
292 (j*geom->GetDeltaEta());
293 etamax = geom->GetArm1EtaMin()+
294 ((j+1)*geom->GetDeltaEta());
295 envelopC[4] = geom->ZFromEtaR(envelopD[6],etamin); //z begin
296 envelopC[7] = geom->ZFromEtaR(envelopD[6],etamax);// z end
298 gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(),
299 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
302 if (i < (geom->GetNLayers()-1)){ // except for the last XU which contains only one scintillator layer
303 envelopD[5] = envelopC[6] ; //rmin
304 envelopD[6] = envelopC[6] + geom->GetPbRadThick(); //rmax
305 envelopD[8] = envelopC[6] ; //rmin
306 envelopD[9] = envelopC[6] + geom->GetPbRadThick(); //rmax
307 for (int j =0; j < (geom->GetNEta()) ; j++){
308 etamin = geom->GetArm1EtaMin()+
309 (j*geom->GetDeltaEta());
310 etamax = geom->GetArm1EtaMin()+
311 ((j+1)*geom->GetDeltaEta());
312 envelopD[4] = geom->ZFromEtaR(envelopC[6],etamin);//z begin
313 envelopD[7] = geom->ZFromEtaR(envelopC[6],etamax);// z end
315 // Position and Define Layer
317 gMC->Gsposp("XPBX",1+j+i*(geom->GetNEta()), label.Data(),
318 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);
324 //______________________________________________________________________
325 void AliEMCALv0::Init(void)
327 // Just prints an information message
330 TString message("\n") ;
331 message += "*****************************************" ;
333 // Here the EMCAL initialisation code (if any!)
335 AliEMCALGeometry * geom = GetGeometry() ;
338 message += "AliEMCAL " ;
339 message += Version() ;
340 message += "EMCAL geometry intialized for " ;
341 message += geom->GetName() ;
344 message += "AliEMCAL " ;
345 message += Version() ;
346 message += "EMCAL geometry initialization failed !" ;
348 message += "*****************************************" ;
349 Info("Init", message.Data() ) ;