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. *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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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"
57 //______________________________________________________________________
58 AliEMCALv0::AliEMCALv0(const char *name, const char *title):
61 // ctor : title is used to identify the layout
66 //______________________________________________________________________
67 void AliEMCALv0::BuildGeometry()
69 // Display Geometry for display.C
71 const Int_t kColorArm1 = kBlue ;
73 AliEMCALGeometry * geom = GetGeometry() ;
75 // Define the shape of the Calorimeter
76 TNode * top = gAlice->GetGeometry()->GetNode("alice") ;
77 new TTUBS("Envelop1", "Tubs that contains arm 1", "void",
78 geom->GetEnvelop(0), // rmin
79 geom->GetEnvelop(1) +30 , // rmax
80 geom->GetEnvelop(2)/2.0, // half length in Z
81 geom->GetArm1PhiMin(), // minimun phi angle
82 geom->GetArm1PhiMax() // maximun phi angle
87 TNode * envelop1node = new TNode("Envelop1", "Arm1 Envelop", "Envelop1"
89 envelop1node->SetLineColor(kColorArm1) ;
90 fNodes->Add(envelop1node) ;
93 //______________________________________________________________________
94 void AliEMCALv0::CreateGeometry()
96 // Create the EMCAL geometry for Geant
98 Float_t etamin,etamax;
101 AliEMCALGeometry * geom = GetGeometry() ;
103 if(!(geom->IsInitialized())){
104 Error("CreateGeometry","EMCAL Geometry class has not been set up.");
107 // Get pointer to the array containing media indices
108 Int_t *idtmed = fIdtmed->GetArray() - 1599 ;
110 // Create an Envelope within which to place the Detector
112 envelopA[0] = geom->GetEnvelop(0); // rmin
113 envelopA[1] = geom->GetEnvelop(1); // rmax
114 envelopA[2] = geom->GetEnvelop(2)/2.0; // dz
115 envelopA[3] = geom->GetArm1PhiMin(); // minimun phi angle
116 envelopA[4] = geom->GetArm1PhiMax(); // maximun phi angle
119 gMC->Gsvolu("XEN1", "TUBS ", idtmed[1599], envelopA, 5) ; //filled with air
121 AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ;
123 // Position the EMCAL Mother Volume in Alice
124 gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
127 TString label = "XU0";
129 //rmin Start mini envelopes after the aluminium layer
130 envelopA[0] = geom->GetEnvelop(0) + geom->GetGap2Active() +
131 geom->GetAlFrontThickness();
133 //rmax larger for first two layers (preshower);
134 Float_t tseg = geom->GetPreSintThick()+geom->GetPbRadThick();
135 envelopA[1] = envelopA[0] + 2.0*tseg;
136 envelopA[2] = geom->GetEnvelop(2)/2.0; // dz
137 envelopA[3] = geom->GetArm1PhiMin(); // minimun phi angle
138 envelopA[4] = geom->GetArm1PhiMax(); // maximun phi angle
141 gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
143 // Place XU0 in to XEN1
144 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY");
146 tseg = geom->GetFullSintThick()+geom->GetPbRadThick();
147 for (int i = 1; i < ((geom->GetNLayers()-1)/2) + 1 ; i++ ){
150 envelopA[0] = envelopA[1]; //rmin
151 envelopA[1] = envelopA[0] + 2.0*tseg; //rmax
154 gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
155 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
158 // Create the shapes of active material (LEAD/Aluminium/Scintillator)
160 Float_t envelopB[10]; // First Layer of Aluminium
161 Float_t envelopC[10]; // Scintillator Layers
162 Float_t envelopD[10]; // Lead Layers
164 //starting position in Phi
165 envelopC[0] = envelopD[0] = envelopB[0] = geom->GetArm1PhiMin();
167 // Angular size of the Detector in Phi
168 envelopB[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin();
169 envelopC[1] = envelopD[1] = envelopB[1];
171 // Number of Section in Phi
172 envelopC[2] = envelopD[2] = envelopB[2] = geom->GetNPhi();
174 // each section will be passed 2 z coordinates
175 envelopD[3] = envelopC[3] = envelopB[3] = 2;
176 envelopB[4] = geom->ZFromEtaR(geom->GetEnvelop(0)+geom->GetGap2Active(),
177 geom->GetArm1EtaMin());// z co-ordinate 1
178 envelopB[5] = geom->GetEnvelop(0) + geom->GetGap2Active(); //rmin at z1
179 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();//rmax at z1
180 envelopD[6] = envelopB[6];
181 envelopB[7] = geom->ZFromEtaR(geom->GetEnvelop(0)+geom->GetGap2Active(),
182 geom->GetArm1EtaMax()); // z co-ordinate 2
183 envelopB[8] = envelopB[5] ; //
184 envelopB[9] = envelopB[6] ; // radii are the same.
186 // filled shapes wit hactive material
188 // Define Aluminium volume completely
189 gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10);
191 // The polystyrene layers will be defined when placed
192 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0);
193 gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0);// as will the lead layers
195 // Dividind eta polystyrene divisions into phi segments.
196 gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2);
198 // Position Aluminium Layer in the Envelope
199 gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ;
201 // The loop below places the scintillator in Lead Layers alternately.
202 for (int i = 0; i < geom->GetNLayers() ; i++ ){
204 label += (int) i/2 ; // we will place two layers (i = one layer) in each mini envelope)
205 envelopC[5] = envelopD[6] ; //rmin
206 envelopC[6] = envelopD[6] + ((i > 1) ? geom->GetFullSintThick() :
207 geom->GetPreSintThick());//rmax larger for first two layers (preshower)
208 envelopC[8] = envelopD[6] ; //rmin
209 envelopC[9] = envelopD[6] + ((i > 1 ) ? geom->GetFullSintThick() :
210 geom->GetPreSintThick());//rmax larger for first two layers (preshower)
211 for (int j =0; j < (geom->GetNEta()) ; j++){
212 etamin = geom->GetArm1EtaMin()+
213 (j*geom->GetDeltaEta());
214 etamax = geom->GetArm1EtaMin()+
215 ((j+1)*geom->GetDeltaEta());
216 envelopC[4] = geom->ZFromEtaR(envelopD[6],etamin); //z begin
217 envelopC[7] = geom->ZFromEtaR(envelopD[6],etamax);// z end
218 gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(), // should be used but there's a weird crash above i = 18,
219 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
222 if (i < (geom->GetNLayers()-1)){
223 envelopD[5] = envelopC[6] ; //rmin
224 envelopD[6] = envelopC[6] + geom->GetPbRadThick(); //rmax
225 envelopD[8] = envelopC[6] ; //rmin
226 envelopD[9] = envelopC[6] + geom->GetPbRadThick(); //rmax
227 for (int j =0; j < (geom->GetNEta()) ; j++){
228 etamin = geom->GetArm1EtaMin()+
229 (j*geom->GetDeltaEta());
230 etamax = geom->GetArm1EtaMin()+
231 ((j+1)*geom->GetDeltaEta());
232 envelopD[4] = geom->ZFromEtaR(envelopC[6],etamin);//z begin
233 envelopD[7] = geom->ZFromEtaR(envelopC[6],etamax);// z end
235 // Position and Define Layer
236 gMC->Gsposp("XPBX",1+ j+i*(geom->GetNEta()), label.Data(),
237 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);
243 //______________________________________________________________________
244 void AliEMCALv0::Init(void)
246 // Just prints an information message
249 TString message("\n") ;
250 message += "*****************************************" ;
252 // Here the EMCAL initialisation code (if any!)
254 AliEMCALGeometry * geom = GetGeometry() ;
257 message += "AliEMCAL " ;
258 message += Version() ;
259 message += "EMCAL geometry intialized for " ;
260 message += geom->GetName() ;
263 message += "AliEMCAL " ;
264 message += Version() ;
265 message += "EMCAL geometry initialization failed !" ;
267 message += "*****************************************" ;
268 Info("Init", message.Data() ) ;