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 1 scintillator, and 1 lead layer, 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 ---
36 #include "TGeometry.h"
37 #include "TVirtualMC.h"
40 // --- Standard library ---
44 // --- AliRoot header files ---
46 #include "AliEMCALv0.h"
47 #include "AliEMCALGeometry.h"
52 //______________________________________________________________________
53 AliEMCALv0::AliEMCALv0(const char *name, const char *title):
56 // ctor : title is used to identify the layout
61 //______________________________________________________________________
62 void AliEMCALv0::BuildGeometry()
64 // Display Geometry for display.C
66 const Int_t kColorArm1 = kBlue ;
68 AliEMCALGeometry * geom = GetGeometry() ;
70 // Define the shape of the Calorimeter
71 TNode * top = gAlice->GetGeometry()->GetNode("alice") ;
72 new TTUBS("Envelop1", "Tubs that contains arm 1", "void",
73 geom->GetEnvelop(0), // rmin
74 geom->GetEnvelop(1) +30 ,// rmax
75 geom->GetEnvelop(2)/2.0, // half length in Z
76 geom->GetArm1PhiMin(), // minimum phi angle
77 geom->GetArm1PhiMax() // maximum phi angle
82 TNode * envelop1node = new TNode("Envelop1", "Arm1 Envelop", "Envelop1"
84 envelop1node->SetLineColor(kColorArm1) ;
85 fNodes->Add(envelop1node) ;
88 //______________________________________________________________________
89 void AliEMCALv0::CreateGeometry()
91 // Create the EMCAL geometry for Geant
92 // Geometry of a tower
93 //|-----------------------------------------------------| XEN1
95 //| | Al thickness = GetAlFrontThickness() | |
99 //| ------------------------------------------------- |
100 //| | Air Gap = GetGap2Active() | |
102 //| ------------------------------------------------- |
103 //| | XU1 : XPST (ECAL e = GetECScintThick() ) | |
104 //| ------------------------------------------------- |
105 //| | XU1 : XPBX (ECAL e = GetECPbRadThick() ) | |
106 //| ------------------------------------------------- |
107 //| | XU1 : XPST (ECAL e = GetECScintThick() | |
108 //| ------------------------------------------------- |
109 //| | XU1 : XPBX (ECAL e = GetECPbRadThick() ) | |
110 //| ------------------------------------------------- |
111 //| etc ..... GetNECLayers() - 1 times |
112 //| ------------------------------------------------- |
113 //| | XUNLayer : XPST (ECAL e = GetECScintThick() | |
114 //| ------------------------------------------------- |
116 Float_t etamin,etamax;
119 AliEMCALGeometry * geom = GetGeometry() ;
121 if(!(geom->IsInitialized())){
122 Error("CreateGeometry","EMCAL Geometry class has not been set up.");
125 // Get pointer to the array containing media indices
126 Int_t *idtmed = fIdtmed->GetArray() - 1599 ;
129 AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ;
131 // Create the EMCAL Mother Volume (a polygone) within which to place the Detector and named XEN1
133 Float_t envelopA[10];
134 envelopA[0] = geom->GetArm1PhiMin(); // minimum phi angle
135 envelopA[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin(); // angular range in phi
136 envelopA[2] = geom->GetNPhi(); // number of sections in phi
137 envelopA[3] = 2; // 2 z coordinates
138 envelopA[4] = geom->ZFromEtaR(geom->GetEnvelop(1),
139 geom->GetArm1EtaMin()); // z coordinate 1
140 //add some padding for mother volume
141 envelopA[5] = geom->GetEnvelop(0) ; // rmin at z1
142 envelopA[6] = geom->GetEnvelop(1) ; // rmax at z1
143 envelopA[7] = geom->ZFromEtaR(geom->GetEnvelop(1),
144 geom->GetArm1EtaMax()); // z coordinate 2
145 envelopA[8] = envelopA[5] ; // radii are the same.
146 envelopA[9] = envelopA[6] ; // radii are the same.
148 gMC->Gsvolu("XEN1", "PGON ", idtmed[1599], envelopA, 10) ; // Polygone filled with air
150 // Position the EMCAL Mother Volume (XEN1) in Alice (ALIC)
152 gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
155 printf("CreateGeometry: XEN1 = %f, %f\n", envelopA[5], envelopA[6]);
156 printf("CreateGeometry: XU0 = %f, %f\n", envelopA[5], envelopA[6]);
158 // Create mini-envelopes which will contain the Tower scintillator-radiator
162 envelopA[5] = envelopA[5] + geom->GetGap2Active() // we are at the first scintllator
163 + geom->GetAlFrontThickness(); // rmin at z1
164 envelopA[6] = envelopA[5] ;
169 Int_t nLayers = geom->GetNECLayers();
171 for (i = 0; i < (nLayers-1); i++ ){
175 tseg = geom->GetECScintThick()+geom->GetECPbRadThick(); // thickness of scintillator+Pb in E Cal
176 envelopA[5] = envelopA[6] ; // rmin at z1
177 envelopA[4] = geom->ZFromEtaR(envelopA[5] + tseg,
178 geom->GetArm1EtaMin()); // z coordinate 1
179 envelopA[7] = geom->ZFromEtaR(envelopA[5] + tseg,
180 geom->GetArm1EtaMax()); // z coordinate 2
181 envelopA[6] = envelopA[5] + tseg ; // rmax at z1
182 envelopA[8] = envelopA[5] ; // radii are the same.
183 envelopA[9] = envelopA[6] ; // radii are the same.
185 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
187 // Position XUi in XEN1
189 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
192 printf("CreateGeometry: XU%d = %f, %f\n", i, envelopA[5], envelopA[6]);
197 // Create one mini-envelope which will contain the last scintillator XU(nlayers-1) because there is one more scintillator than Pb layer XU(nlayers-1)
201 envelopA[5] = envelopA[6] ; // rmin at z1
202 envelopA[4] = geom->ZFromEtaR(envelopA[5] + geom->GetECScintThick(),
203 geom->GetArm1EtaMin()); // z coordinate 1
204 envelopA[7] = geom->ZFromEtaR(envelopA[5] + geom->GetECScintThick(),
205 geom->GetArm1EtaMax()); // z coordinate 2
206 envelopA[6] = envelopA[5] + geom->GetECScintThick() ; // 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 the last minienvelope in XEN1
214 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
217 printf("CreateGeometry: XEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
219 // Create the shapes of active material (LEAD/Aluminium/Scintillator)
221 Float_t envelopB[10]; // First Layer of Aluminium
222 Float_t envelopC[10]; // Scintillator Layers
223 Float_t envelopD[10]; // Lead Layers
225 envelopC[0] = envelopD[0] = envelopB[0] = envelopA[0] ; // starting position in Phi
226 envelopC[1] = envelopD[1] = envelopB[1] = envelopA[1] ; // angular range in phi
227 envelopC[2] = envelopD[2] = envelopB[2] = envelopA[2] ; // number of sections in Phi
228 envelopC[3] = envelopD[3] = envelopB[3] = envelopA[3] ; // 2 z coordinates
230 Float_t dist = geom->GetEnvelop(0) + geom->GetAlFrontThickness() + geom->GetGap2Active() ;
231 envelopB[4] = geom->ZFromEtaR(dist,
232 geom->GetArm1EtaMin()); // z co-ordinate 1
233 envelopB[5] = geom->GetEnvelop(0) ; // rmin at z1
234 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();// rmax at z1
235 envelopB[7] = geom->ZFromEtaR(dist,
236 geom->GetArm1EtaMax()); // z co-ordinate 2
237 envelopB[8] = envelopB[5] ; // radii are the same.
238 envelopB[9] = envelopB[6] ; // radii are the same.
240 // Define active volumes completely
242 gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10); // PGON filled with Al
244 gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ; // Position Aluminium Layer in XEN1
246 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0); // PGON filled with Scintillator (shape to be defined by GSPOSP)
248 gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0); // PGON filled with Lead (shape to be defined by GSPOSP)
250 //gMC->Gsvolu("XCUX", "PGON", idtmed[1603], dum, 0); // PGON filled with Copper (shape to be defined by GSPOSP)
252 gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2); // Divide eta section of scintillators into phi segments.
254 // Position alternatively scintillator and Lead Layers in XUi.
256 envelopD[6] = envelopB[6] + geom->GetGap2Active() ;// gap between Al layer and XU0
258 for (int i = 0; i < nLayers; i++ ){
260 label += i ; // we will place one layer in each mini envelope)
262 Float_t scthick ; // scintillator thickness
263 scthick = geom->GetECScintThick() ;
265 envelopC[5] = envelopD[6] ; //rmin
266 envelopC[6] = envelopC[5] + scthick ; //rmax
267 envelopC[8] = envelopC[5] ; //rmin
268 envelopC[9] = envelopC[6] ; //rmax
271 printf("CreateGeometry: volume = %s, name = XPST thickness = %f deb = %f/%f fin = %f/%f", label.Data(), scthick, envelopC[5], envelopC[8], envelopC[6], envelopC[9]) ;
273 for (int j =0; j < (geom->GetNEta()) ; j++){
274 etamin = geom->GetArm1EtaMin()+
275 (j*geom->GetDeltaEta());
276 etamax = geom->GetArm1EtaMin()+
277 ((j+1)*geom->GetDeltaEta());
278 envelopC[4] = geom->ZFromEtaR(envelopC[5],etamin); //z begin
279 envelopC[7] = geom->ZFromEtaR(envelopC[5],etamax);// z end
281 gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(),
282 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
285 Float_t radthick ; // radiator thickness
286 TString radname ; // radiator name
287 radthick = geom->GetECPbRadThick();
290 if ( i < nLayers -1 ) { // except for the last XU which contains only one scintillator layer
292 envelopD[5] = envelopC[6] ; //rmin
293 envelopD[8] = envelopD[5] ; //rmin
294 envelopD[6] = envelopD[5] + radthick ; // rmax
295 envelopD[9] = envelopD[6] ; //rmax
298 printf("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]) ;
300 for (int j =0; j < (geom->GetNEta()) ; j++){
301 etamin = geom->GetArm1EtaMin()+
302 (j*geom->GetDeltaEta());
303 etamax = geom->GetArm1EtaMin()+
304 ((j+1)*geom->GetDeltaEta());
305 envelopD[4] = geom->ZFromEtaR(envelopD[5],etamin);//z begin
306 envelopD[7] = geom->ZFromEtaR(envelopD[5],etamax);// z end
308 // Position and Define Layer
310 gMC->Gsposp(radname.Data(),1+j+i*(geom->GetNEta()), label.Data(),
311 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);
313 } // if not last layer
317 //______________________________________________________________________
318 void AliEMCALv0::Init(void)
320 // Just prints an information message
323 TString message("\n") ;
324 message += "*****************************************\n" ;
326 // Here the EMCAL initialisation code (if any!)
328 AliEMCALGeometry * geom = GetGeometry() ;
331 message += "AliEMCAL " ;
332 message += Version() ;
333 message += "EMCAL geometry initialized for " ;
334 message += geom->GetName() ;
337 message += "AliEMCAL " ;
338 message += Version() ;
339 message += "EMCAL geometry initialization failed !" ;
341 message += "\n*****************************************" ;
342 printf(message.Data() ) ;