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 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"
53 //______________________________________________________________________
54 AliEMCALv0::AliEMCALv0(const char *name, const char *title):
57 // ctor : title is used to identify the layout
62 //______________________________________________________________________
63 void AliEMCALv0::BuildGeometry()
65 // Display Geometry for display.C
67 const Int_t kColorArm1 = kBlue ;
69 AliEMCALGeometry * geom = GetGeometry() ;
71 // Define the shape of the Calorimeter
72 TNode * top = gAlice->GetGeometry()->GetNode("alice") ;
73 new TTUBS("Envelop1", "Tubs that contains arm 1", "void",
74 geom->GetEnvelop(0), // rmin
75 geom->GetEnvelop(1) +30 ,// rmax
76 geom->GetEnvelop(2)/2.0, // half length in Z
77 geom->GetArm1PhiMin(), // minimum phi angle
78 geom->GetArm1PhiMax() // maximum phi angle
83 TNode * envelop1node = new TNode("Envelop1", "Arm1 Envelop", "Envelop1"
85 envelop1node->SetLineColor(kColorArm1) ;
86 fNodes->Add(envelop1node) ;
89 //______________________________________________________________________
90 void AliEMCALv0::CreateGeometry()
92 // Create the EMCAL geometry for Geant
93 // Geometry of a tower
94 //|-----------------------------------------------------| XEN1
96 //| | Al thickness = GetAlFrontThickness() | |
100 //| ------------------------------------------------- |
101 //| | Air Gap = GetGap2Active() | |
103 //| ------------------------------------------------- |
104 //| | XU1 : XPST (ECAL e = GetECScintThick() ) | |
105 //| ------------------------------------------------- |
106 //| | XU1 : XPBX (ECAL e = GetECPbRadThick() ) | |
107 //| ------------------------------------------------- |
108 //| | XU1 : XPST (ECAL e = GetECScintThick() | |
109 //| ------------------------------------------------- |
110 //| | XU1 : XPBX (ECAL e = GetECPbRadThick() ) | |
111 //| ------------------------------------------------- |
112 //| etc ..... GetNECLayers() - 1 times |
113 //| ------------------------------------------------- |
114 //| | XUNLayer : XPST (ECAL e = GetECScintThick() | |
115 //| ------------------------------------------------- |
117 Float_t etamin,etamax;
120 AliEMCALGeometry * geom = GetGeometry() ;
122 if(!(geom->IsInitialized())){
123 Error("CreateGeometry","EMCAL Geometry class has not been set up.");
126 // Get pointer to the array containing media indices
127 Int_t *idtmed = fIdtmed->GetArray() - 1599 ;
130 AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ;
132 // Create the EMCAL Mother Volume (a polygone) within which to place the Detector and named XEN1
134 Float_t envelopA[10];
135 envelopA[0] = geom->GetArm1PhiMin(); // minimum phi angle
136 envelopA[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin(); // angular range in phi
137 envelopA[2] = geom->GetNPhi(); // number of sections in phi
138 envelopA[3] = 2; // 2 z coordinates
139 envelopA[4] = geom->ZFromEtaR(geom->GetEnvelop(1),
140 geom->GetArm1EtaMin()); // z coordinate 1
141 //add some padding for mother volume
142 envelopA[5] = geom->GetEnvelop(0) ; // rmin at z1
143 envelopA[6] = geom->GetEnvelop(1) ; // rmax at z1
144 envelopA[7] = geom->ZFromEtaR(geom->GetEnvelop(1),
145 geom->GetArm1EtaMax()); // z coordinate 2
146 envelopA[8] = envelopA[5] ; // radii are the same.
147 envelopA[9] = envelopA[6] ; // radii are the same.
149 gMC->Gsvolu("XEN1", "PGON ", idtmed[1599], envelopA, 10) ; // Polygone filled with air
151 // Position the EMCAL Mother Volume (XEN1) in Alice (ALIC)
153 gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
155 if (AliLog::GetGlobalDebugLevel()>=2) {
156 printf("CreateGeometry: XEN1 = %f, %f\n", envelopA[5], envelopA[6]);
157 printf("CreateGeometry: XU0 = %f, %f\n", envelopA[5], envelopA[6]);
159 // Create mini-envelopes which will contain the Tower scintillator-radiator
163 envelopA[5] = envelopA[5] + geom->GetGap2Active() // we are at the first scintllator
164 + geom->GetAlFrontThickness(); // rmin at z1
165 envelopA[6] = envelopA[5] ;
170 Int_t nLayers = geom->GetNECLayers();
172 for (i = 0; i < (nLayers-1); i++ ){
176 tseg = geom->GetECScintThick()+geom->GetECPbRadThick(); // thickness of scintillator+Pb in E Cal
177 envelopA[5] = envelopA[6] ; // rmin at z1
178 envelopA[4] = geom->ZFromEtaR(envelopA[5] + tseg,
179 geom->GetArm1EtaMin()); // z coordinate 1
180 envelopA[7] = geom->ZFromEtaR(envelopA[5] + tseg,
181 geom->GetArm1EtaMax()); // z coordinate 2
182 envelopA[6] = envelopA[5] + tseg ; // rmax at z1
183 envelopA[8] = envelopA[5] ; // radii are the same.
184 envelopA[9] = envelopA[6] ; // radii are the same.
186 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air
188 // Position XUi in XEN1
190 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
192 if (AliLog::GetGlobalDebugLevel() >= 2)
193 printf("CreateGeometry: XU%d = %f, %f\n", i, envelopA[5], envelopA[6]);
198 // 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)
202 envelopA[5] = envelopA[6] ; // rmin at z1
203 envelopA[4] = geom->ZFromEtaR(envelopA[5] + geom->GetECScintThick(),
204 geom->GetArm1EtaMin()); // z coordinate 1
205 envelopA[7] = geom->ZFromEtaR(envelopA[5] + geom->GetECScintThick(),
206 geom->GetArm1EtaMax()); // z coordinate 2
207 envelopA[6] = envelopA[5] + geom->GetECScintThick() ; // rmax at z1
208 envelopA[8] = envelopA[5] ; // radii are the same.
209 envelopA[9] = envelopA[6] ; // radii are the same.
211 gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10); // Polygone filled with air
213 // Position the last minienvelope in XEN1
215 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ;
217 if(AliLog::GetGlobalDebugLevel() >= 2)
218 printf("CreateGeometry: XEN%d = %f, %f\n", i, envelopA[5], envelopA[6]);
220 // Create the shapes of active material (LEAD/Aluminium/Scintillator)
222 Float_t envelopB[10]; // First Layer of Aluminium
223 Float_t envelopC[10]; // Scintillator Layers
224 Float_t envelopD[10]; // Lead Layers
226 envelopC[0] = envelopD[0] = envelopB[0] = envelopA[0] ; // starting position in Phi
227 envelopC[1] = envelopD[1] = envelopB[1] = envelopA[1] ; // angular range in phi
228 envelopC[2] = envelopD[2] = envelopB[2] = envelopA[2] ; // number of sections in Phi
229 envelopC[3] = envelopD[3] = envelopB[3] = envelopA[3] ; // 2 z coordinates
231 Float_t dist = geom->GetEnvelop(0) + geom->GetAlFrontThickness() + geom->GetGap2Active() ;
232 envelopB[4] = geom->ZFromEtaR(dist,
233 geom->GetArm1EtaMin()); // z co-ordinate 1
234 envelopB[5] = geom->GetEnvelop(0) ; // rmin at z1
235 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();// rmax at z1
236 envelopB[7] = geom->ZFromEtaR(dist,
237 geom->GetArm1EtaMax()); // z co-ordinate 2
238 envelopB[8] = envelopB[5] ; // radii are the same.
239 envelopB[9] = envelopB[6] ; // radii are the same.
241 // Define active volumes completely
243 gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10); // PGON filled with Al
245 gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ; // Position Aluminium Layer in XEN1
247 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0); // PGON filled with Scintillator (shape to be defined by GSPOSP)
249 gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0); // PGON filled with Lead (shape to be defined by GSPOSP)
251 //gMC->Gsvolu("XCUX", "PGON", idtmed[1603], dum, 0); // PGON filled with Copper (shape to be defined by GSPOSP)
253 gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2); // Divide eta section of scintillators into phi segments.
255 // Position alternatively scintillator and Lead Layers in XUi.
257 envelopD[6] = envelopB[6] + geom->GetGap2Active() ;// gap between Al layer and XU0
259 for (int i = 0; i < nLayers; i++ ){
261 label += i ; // we will place one layer in each mini envelope)
263 Float_t scthick ; // scintillator thickness
264 scthick = geom->GetECScintThick() ;
266 envelopC[5] = envelopD[6] ; //rmin
267 envelopC[6] = envelopC[5] + scthick ; //rmax
268 envelopC[8] = envelopC[5] ; //rmin
269 envelopC[9] = envelopC[6] ; //rmax
271 if(AliLog::GetGlobalDebugLevel() >= 2 )
272 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]) ;
274 for (int j =0; j < (geom->GetNEta()) ; j++){
275 etamin = geom->GetArm1EtaMin()+
276 (j*geom->GetDeltaEta());
277 etamax = geom->GetArm1EtaMin()+
278 ((j+1)*geom->GetDeltaEta());
279 envelopC[4] = geom->ZFromEtaR(envelopC[5],etamin); //z begin
280 envelopC[7] = geom->ZFromEtaR(envelopC[5],etamax);// z end
282 gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(),
283 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer
286 Float_t radthick ; // radiator thickness
287 TString radname ; // radiator name
288 radthick = geom->GetECPbRadThick();
291 if ( i < nLayers -1 ) { // except for the last XU which contains only one scintillator layer
293 envelopD[5] = envelopC[6] ; //rmin
294 envelopD[8] = envelopD[5] ; //rmin
295 envelopD[6] = envelopD[5] + radthick ; // rmax
296 envelopD[9] = envelopD[6] ; //rmax
298 if(AliLog::GetGlobalDebugLevel() >= 2 )
299 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]) ;
301 for (int j =0; j < (geom->GetNEta()) ; j++){
302 etamin = geom->GetArm1EtaMin()+
303 (j*geom->GetDeltaEta());
304 etamax = geom->GetArm1EtaMin()+
305 ((j+1)*geom->GetDeltaEta());
306 envelopD[4] = geom->ZFromEtaR(envelopD[5],etamin);//z begin
307 envelopD[7] = geom->ZFromEtaR(envelopD[5],etamax);// z end
309 // Position and Define Layer
311 gMC->Gsposp(radname.Data(),1+j+i*(geom->GetNEta()), label.Data(),
312 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10);
314 } // if not last layer
318 //______________________________________________________________________
319 void AliEMCALv0::Init(void)
321 // Just prints an information message
323 if(AliLog::GetGlobalDebugLevel()>0) {
324 TString message("\n") ;
325 message += "*****************************************\n" ;
327 // Here the EMCAL initialisation code (if any!)
329 AliEMCALGeometry * geom = GetGeometry() ;
332 message += "AliEMCAL " ;
333 message += Version() ;
334 message += "EMCAL geometry initialized for " ;
335 message += geom->GetName() ;
338 message += "AliEMCAL " ;
339 message += Version() ;
340 message += "EMCAL geometry initialization failed !" ;
342 message += "\n*****************************************" ;
343 printf(message.Data() ) ;