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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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 ;
140 // Create an Envelope within which to place the Detector
142 envelopA[0] = geom->GetEnvelop(0); // rmin
143 envelopA[1] = geom->GetEnvelop(1); // rmax
144 envelopA[2] = geom->GetEnvelop(2)/2.0; // dz
145 envelopA[3] = geom->GetArm1PhiMin(); // minimun phi angle
146 envelopA[4] = geom->GetArm1PhiMax(); // maximun phi angle
149 gMC->Gsvolu("XEN1", "TUBS ", idtmed[1599], envelopA, 5) ; //filled with air
151 AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ;
153 // Position the EMCAL Mother Volume in Alice
154 gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
157 TString label = "XU0";
159 //rmin Start mini envelopes after the aluminium layer
160 envelopA[0] = geom->GetEnvelop(0) + geom->GetGap2Active() +
161 geom->GetAlFrontThickness();
163 //rmax larger for first two layers (preshower);
164 Float_t tseg = geom->GetPreSintThick()+geom->GetPbRadThick();
165 envelopA[1] = envelopA[0] + 2.0*tseg;
166 envelopA[2] = geom->GetEnvelop(2)/2.0; // dz
167 envelopA[3] = geom->GetArm1PhiMin(); // minimun phi angle
168 envelopA[4] = geom->GetArm1PhiMax(); // maximun phi angle
171 gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
173 // Place XU0 in to XEN1
174 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY");
176 tseg = geom->GetFullSintThick()+geom->GetPbRadThick();
178 for (i = 1; i < ((geom->GetNLayers()-2)/2) + 1 ; i++ ){
181 envelopA[0] = envelopA[1]; //rmin
182 envelopA[1] = envelopA[0] + 2.0*tseg; //rmax
185 gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
186 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
189 tseg = geom->GetFullSintThick() ;
192 envelopA[0] = envelopA[1]; //rmin
193 envelopA[1] = envelopA[0] + tseg; //rmax
196 gMC->Gsvolu(label.Data(), "TUBS ", idtmed[1599], envelopA, 5);
197 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
200 // Create the shapes of active material (LEAD/Aluminium/Scintillator)
202 Float_t envelopB[10]; // First Layer of Aluminium
203 Float_t envelopC[10]; // Scintillator Layers
204 Float_t envelopD[10]; // Lead Layers
206 //starting position in Phi
207 envelopC[0] = envelopD[0] = envelopB[0] = geom->GetArm1PhiMin();
209 // Angular size of the Detector in Phi
210 envelopB[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin();
211 envelopC[1] = envelopD[1] = envelopB[1];
213 // Number of Section in Phi
214 envelopC[2] = envelopD[2] = envelopB[2] = geom->GetNPhi();
216 // each section will be passed 2 z coordinates
217 envelopD[3] = envelopC[3] = envelopB[3] = 2;
218 envelopB[4] = geom->ZFromEtaR(geom->GetEnvelop(0),
219 geom->GetArm1EtaMin());// z co-ordinate 1
220 envelopB[5] = geom->GetEnvelop(0) ; //rmin at z1
221 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();//rmax at z1
222 envelopB[7] = geom->ZFromEtaR(geom->GetEnvelop(0),
223 geom->GetArm1EtaMax()); // z co-ordinate 2
224 envelopB[8] = envelopB[5] ; //
225 envelopB[9] = envelopB[6] ; // radii are the same.
227 // filled shapes with active material
229 // Define Aluminium volume completely
230 gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10);
232 // The polystyrene layers will be defined when placed
233 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0);
234 gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0);// as will the lead layers
236 // Dividind eta polystyrene divisions into phi segments.
237 gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2);
239 // Position Aluminium Layer in the Envelope
240 gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ;
242 // The loop below places the scintillator in Lead Layers alternately.
243 envelopD[6] = envelopB[6] + geom->GetGap2Active() ;
244 for (int i = 0; i < geom->GetNLayers() ; i++ ){
246 label += static_cast<Int_t> (i/2) ; // we will place two layers (i = one layer) in each mini envelope)
247 envelopC[5] = envelopD[6] ; //rmin
248 envelopC[6] = envelopD[6] + ((i > 1) ? geom->GetFullSintThick() :
249 geom->GetPreSintThick());//rmax larger for first two layers (preshower)
250 envelopC[8] = envelopD[6] ; //rmin
251 envelopC[9] = envelopD[6] + ((i > 1 ) ? geom->GetFullSintThick() :
252 geom->GetPreSintThick());//rmax larger for first two layers (preshower)
253 for (int j =0; j < (geom->GetNEta()) ; j++){
254 etamin = geom->GetArm1EtaMin()+
255 (j*geom->GetDeltaEta());
256 etamax = geom->GetArm1EtaMin()+
257 ((j+1)*geom->GetDeltaEta());
258 envelopC[4] = geom->ZFromEtaR(envelopD[6],etamin); //z begin
259 envelopC[7] = geom->ZFromEtaR(envelopD[6],etamax);// z end
261 gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(),
262 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
265 if (i < (geom->GetNLayers()-1)){
266 envelopD[5] = envelopC[6] ; //rmin
267 envelopD[6] = envelopC[6] + geom->GetPbRadThick(); //rmax
268 envelopD[8] = envelopC[6] ; //rmin
269 envelopD[9] = envelopC[6] + geom->GetPbRadThick(); //rmax
270 for (int j =0; j < (geom->GetNEta()) ; j++){
271 etamin = geom->GetArm1EtaMin()+
272 (j*geom->GetDeltaEta());
273 etamax = geom->GetArm1EtaMin()+
274 ((j+1)*geom->GetDeltaEta());
275 envelopD[4] = geom->ZFromEtaR(envelopC[6],etamin);//z begin
276 envelopD[7] = geom->ZFromEtaR(envelopC[6],etamax);// z end
278 // Position and Define Layer
280 gMC->Gsposp("XPBX",1+j+i*(geom->GetNEta()), label.Data(),
281 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);
287 //______________________________________________________________________
288 void AliEMCALv0::Init(void)
290 // Just prints an information message
293 TString message("\n") ;
294 message += "*****************************************" ;
296 // Here the EMCAL initialisation code (if any!)
298 AliEMCALGeometry * geom = GetGeometry() ;
301 message += "AliEMCAL " ;
302 message += Version() ;
303 message += "EMCAL geometry intialized for " ;
304 message += geom->GetName() ;
307 message += "AliEMCAL " ;
308 message += Version() ;
309 message += "EMCAL geometry initialization failed !" ;
311 message += "*****************************************" ;
312 Info("Init", message.Data() ) ;