/************************************************************************** * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$ */ //_________________________________________________________________________ // Implementation version v0 of EMCAL Manager class // An object of this class does not produce hits nor digits // It is the one to use if you do not want to produce outputs in TREEH or TREED // This class places a Geometry of the EMCAL in the ALICE Detector as defined in AliEMCALGeometry.cxx //*-- Author: Yves Schutz (SUBATECH) //*-- and : Sahal Yacoob (LBL / UCT) // This Version of AliEMCALv0 reduces the number of volumes placed in XEN1 (the envelope) to less than five hundred // The Envelope is Placed in Alice, And the Aluminium layer. Mini envelopes (XU) are then placed in XEN1. // Each mini envelope contains 2 scintillator, and 2 lead layers, except the last one which contains just one scintillator layer. // At the moment I cannot place the 36 and above layers in the mini envelopes so all layers are still placed in XEN1 // --- ROOT system --- #include "TPGON.h" #include "TTUBS.h" #include "TNode.h" #include "TRandom.h" #include "TGeometry.h" // --- Standard library --- #include #include #include #include #include // --- AliRoot header files --- #include "AliEMCALv0.h" #include "AliEMCALGeometry.h" #include "AliConst.h" #include "AliRun.h" ClassImp(AliEMCALv0) //______________________________________________________________________ AliEMCALv0::AliEMCALv0(const char *name, const char *title): AliEMCAL(name,title) { // ctor : title is used to identify the layout GetGeometry() ; } //______________________________________________________________________ void AliEMCALv0::BuildGeometry() { // Display Geometry for display.C const Int_t kColorArm1 = kBlue ; AliEMCALGeometry * geom = GetGeometry() ; // Define the shape of the Calorimeter TNode * top = gAlice->GetGeometry()->GetNode("alice") ; new TTUBS("Envelop1", "Tubs that contains arm 1", "void", geom->GetEnvelop(0), // rmin geom->GetEnvelop(1) +30 , // rmax geom->GetEnvelop(2)/2.0, // half length in Z geom->GetArm1PhiMin(), // minimun phi angle geom->GetArm1PhiMax() // maximun phi angle ); // Place the Node top->cd(); TNode * envelop1node = new TNode("Envelop1", "Arm1 Envelop", "Envelop1" ,0., 0., 0., "") ; envelop1node->SetLineColor(kColorArm1) ; fNodes->Add(envelop1node) ; } //______________________________________________________________________ void AliEMCALv0::CreateGeometry() { // Create the EMCAL geometry for Geant // Geometry of a tower //|-----------------------------------------------------| XEN1 //| | | | //| | Al thickness = GetAlFrontThickness() | | //| | | | //| | | | //| | | | //| ------------------------------------------------- | //| | Air Gap = GetGap2Active() | | //| | | | //| ------------------------------------------------- | //| | XU0 : XPST (PreShower e = GetPreSintThick() )| | //| ------------------------------------------------- | //| | XU0 : XPBX (PreShower e = GetPbRadThick() ) | | //| ------------------------------------------------- | //| | XU0 : XPST (PreShower e = GetPreSintThick() )| | //| ------------------------------------------------- | //| | XU0 : XPBX (PreShower e = GetPbRadThick() ) | | //| ------------------------------------------------- | //| | XU1 : XPST (Tower e = GetFullSintThick() ) | | //| ------------------------------------------------- | //| | XU1 : XPBX (Tower e = GetPbRadThick() ) | | //| ------------------------------------------------- | //| | XU1 : XPST (Tower e = GetFullSintThick() | | //| ------------------------------------------------- | //| | XU1 : XPBX (Tower e = GetPbRadThick() ) | | //| ------------------------------------------------- | //| etc ..... | //| ------------------------------------------------- | //| | XU10 : XPST (Tower e = GetFullSintThick() ) | | //|-----------------------------------------------------| Float_t etamin,etamax; Float_t *dum=0; AliEMCALGeometry * geom = GetGeometry() ; if(!(geom->IsInitialized())){ Error("CreateGeometry","EMCAL Geometry class has not been set up."); } // end if // Get pointer to the array containing media indices Int_t *idtmed = fIdtmed->GetArray() - 1599 ; Int_t idrotm = 1; AliMatrix(idrotm, 90.0, 0., 90.0, 90.0, 0.0, 0.0) ; // Create the EMCAL Mother Volume (a polygone) within which to place the Detector and named XEN1 Float_t envelopA[10]; envelopA[0] = geom->GetArm1PhiMin(); // minimum phi angle envelopA[1] = geom->GetArm1PhiMax() - geom->GetArm1PhiMin(); // angular range in phi envelopA[2] = geom->GetNPhi(); // number of sections in phi envelopA[3] = 2; // 2 z coordinates envelopA[4] = geom->ZFromEtaR(geom->GetEnvelop(1), geom->GetArm1EtaMin()); // z coordinate 1 envelopA[5] = geom->GetEnvelop(0) ; // rmin at z1 envelopA[6] = geom->GetEnvelop(1) ; // rmax at z1 envelopA[7] = geom->ZFromEtaR(geom->GetEnvelop(1), geom->GetArm1EtaMax()); // z coordinate 2 envelopA[8] = envelopA[5] ; // radii are the same. envelopA[9] = envelopA[6] ; // radii are the same. gMC->Gsvolu("XEN1", "PGON ", idtmed[1599], envelopA, 10) ; // Polygone filled with air // Position the EMCAL Mother Volume (XEN1) in Alice (ALIC) gMC->Gspos("XEN1", 1, "ALIC", 0.0, 0.0, 0.0, idrotm, "ONLY") ; if (gDebug==2) Info("CreateGeometry","rXEN1 = %f, %f\n", envelopA[5], envelopA[6]); // Create mini-envelopes which will contain the PreShower scintillator-Lead-scintillator-lead if (gDebug==2) Info("CreateGeometry","XU0 = %f, %f\n", envelopA[5], envelopA[6]); // Create mini-envelopes which will contain the Tower scintillator-radiator-scintillator-radiator TString label ; envelopA[5] = envelopA[5] + geom->GetGap2Active() // we are at the first scintllator + geom->GetAlFrontThickness(); // rmin at z1 envelopA[6] = envelopA[5] ; Int_t i ; Int_t nLayers = geom->GetNPRLayers() + geom->GetNECLayers() + geom->GetNHCLayers() ; for (i = 0; i < nLayers/2 ; i++ ){ label = "XU" ; label += i ; Float_t tseg ; if (i == 0 ) tseg = 2 *(geom->GetPreSintThick()+geom->GetPbRadThick()); // thickness of 2 * scintillator+Pb in pre shower else if ( i <= geom->GetNECLayers()/2) tseg = 2* (geom->GetFullSintThick()+geom->GetPbRadThick()); // thickness of 2 * scintillator+Pb in E Cal else tseg = 2* (geom->GetFullSintThick()+geom->GetCuRadThick()); // thickness of 2 * scintillator+Cu in H Cal envelopA[5] = envelopA[6] ; // rmin at z1 envelopA[4] = geom->ZFromEtaR(envelopA[5] + tseg, geom->GetArm1EtaMin()); // z coordinate 1 envelopA[7] = geom->ZFromEtaR(envelopA[5] + tseg, geom->GetArm1EtaMax()); // z coordinate 2 envelopA[6] = envelopA[5] + tseg ; // rmax at z1 envelopA[8] = envelopA[5] ; // radii are the same. envelopA[9] = envelopA[6] ; // radii are the same. gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10);// Polygone filled with air // Position XUi in XEN1 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ; if (gDebug == 2) Info("CreateGeometry","XU%d = %f, %f\n", i, envelopA[5], envelopA[6]); } // end i // Create one mini-envelope which will contain the last Tower scintillator (XU(nlayers-1)/2) label = "XU" ; label += i ; envelopA[5] = envelopA[6] ; // rmin at z1 envelopA[4] = geom->ZFromEtaR(envelopA[5], geom->GetArm1EtaMin()); // z coordinate 1 envelopA[7] = geom->ZFromEtaR(envelopA[5], geom->GetArm1EtaMax()); // z coordinate 2 envelopA[6] = envelopA[5] + geom->GetFullSintThick() ; // rmax at z1 envelopA[8] = envelopA[5] ; // radii are the same. envelopA[9] = envelopA[6] ; // radii are the same. gMC->Gsvolu(label.Data(), "PGON", idtmed[1599], envelopA, 10); // Polygone filled with air // Position the last minienvelope in XEN1 gMC->Gspos(label.Data(), 1, "XEN1", 0.0, 0.0, 0.0, idrotm, "ONLY") ; if(gDebug == 2) Info("CreateGeometry","XEN%d = %f, %f\n", i, envelopA[5], envelopA[6]); // Create the shapes of active material (LEAD/Aluminium/Scintillator) // to be placed Float_t envelopB[10]; // First Layer of Aluminium Float_t envelopC[10]; // Scintillator Layers Float_t envelopD[10]; // Lead Layers envelopC[0] = envelopD[0] = envelopB[0] = envelopA[0] ; // starting position in Phi envelopC[1] = envelopD[1] = envelopB[1] = envelopA[1] ; // angular range in phi envelopC[2] = envelopD[2] = envelopB[2] = envelopA[2] ; // number of sections in Phi envelopD[3] = envelopC[3] = envelopB[3] = envelopA[3] ; // 2 z coordinates Float_t dist = geom->GetEnvelop(0) + geom->GetAlFrontThickness() + geom->GetGap2Active() ; envelopB[4] = geom->ZFromEtaR(dist, geom->GetArm1EtaMin()); // z co-ordinate 1 envelopB[5] = geom->GetEnvelop(0) ; // rmin at z1 envelopB[6] = envelopB[5] + geom->GetAlFrontThickness();// rmax at z1 envelopB[7] = geom->ZFromEtaR(dist, geom->GetArm1EtaMax()); // z co-ordinate 2 envelopB[8] = envelopB[5] ; // radii are the same. envelopB[9] = envelopB[6] ; // radii are the same. // Define active volumes completely gMC->Gsvolu("XALU", "PGON", idtmed[1602], envelopB, 10); // PGON filled with Al gMC->Gspos("XALU", 1, "XEN1", 0.0, 0.0, 0.0 , idrotm, "ONLY") ; // Position Aluminium Layer in XEN1 gMC->Gsvolu("XPST", "PGON", idtmed[1601], dum, 0); // PGON filled with Scintillator (shape to be defined by GSPOSP) gMC->Gsvolu("XPBX", "PGON", idtmed[1600], dum, 0); // PGON filled with Lead (shape to be defined by GSPOSP) gMC->Gsvolu("XCUX", "PGON", idtmed[1603], dum, 0); // PGON filled with Copper (shape to be defined by GSPOSP) gMC->Gsdvn("XPHI", "XPST", geom->GetNPhi(), 2); // Divide eta section of scintillators into phi segments. // Position alternatively scintillator and Lead Layers in XUi. envelopD[6] = envelopB[6] + geom->GetGap2Active() ;// gap between Al layer and XU0 for (int i = 0; i < nLayers; i++ ){ label = "XU" ; label += static_cast (i/2) ; // we will place two layers (i = one layer) in each mini envelope) Float_t scthick ; // scintillator thickness if ( i < geom->GetNPRLayers() ) // its a preshower scthick = geom->GetPreSintThick() ; else if( i < geom->GetNPRLayers() + geom->GetNECLayers() ) // its an EMCAL section scthick = geom->GetFullSintThick() ; else // its an HCAL section scthick = geom->GetFullSintThick() ; envelopC[5] = envelopD[6] ; //rmin envelopC[6] = envelopC[5] + scthick ; //rmax envelopC[8] = envelopC[5] ; //rmin envelopC[9] = envelopC[6] ; //rmax // envelopC[6] = envelopD[6] + ((i > 1) ? geom->GetFullSintThick() : geom->GetPreSintThick());//rmax larger for first two layers (preshower) // envelopC[9] = envelopD[6] + ((i > 1 ) ? geom->GetFullSintThick() :geom->GetPreSintThick());//rmax larger for first two layers (preshower) if(gDebug == 2 ) Info("CreateGeometry", "volume = %s, name = XPST thickness = %f deb = %f/%f fin = %f/%f", label.Data(), scthick, envelopC[5], envelopC[8], envelopC[6], envelopC[9]) ; for (int j =0; j < (geom->GetNEta()) ; j++){ etamin = geom->GetArm1EtaMin()+ (j*geom->GetDeltaEta()); etamax = geom->GetArm1EtaMin()+ ((j+1)*geom->GetDeltaEta()); envelopC[4] = geom->ZFromEtaR(envelopC[5],etamin); //z begin envelopC[7] = geom->ZFromEtaR(envelopC[5],etamax);// z end gMC->Gsposp("XPST",1+j+i*(geom->GetNEta()), label.Data(), 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopC, 10); // Position and define layer } // end for j if (i < nLayers){ Float_t radthick ; // radiator thickness TString radname ; // radiator name if ( i <= 1 ) { // its a preshower radthick = geom->GetPbRadThick(); radname = "XPBX" ; } else if( i <= geom->GetNECLayers()) {// its an EMCAL section radthick = geom->GetPbRadThick(); radname = "XPBX" ; } else { // its an HCAL section radthick = geom->GetCuRadThick(); radname = "XCUX" ; } if ( i < nLayers -1 ) { // except for the last XU which contains only one scintillator layer envelopD[5] = envelopC[6] ; //rmin envelopD[8] = envelopD[5] ; //rmin envelopD[6] = envelopD[5] + radthick ; // rmax // envelopD[6] = envelopC[6] + geom->GetPbRadThick(); //rmax envelopD[9] = envelopD[6] ; //rmax // envelopD[9] = envelopC[6] + geom->GetPbRadThick(); //rmax if(gDebug == 2 ) Info("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]) ; for (int j =0; j < (geom->GetNEta()) ; j++){ etamin = geom->GetArm1EtaMin()+ (j*geom->GetDeltaEta()); etamax = geom->GetArm1EtaMin()+ ((j+1)*geom->GetDeltaEta()); envelopD[4] = geom->ZFromEtaR(envelopD[5],etamin);//z begin envelopD[7] = geom->ZFromEtaR(envelopD[5],etamax);// z end // Position and Define Layer gMC->Gsposp(radname.Data(),1+j+i*(geom->GetNEta()), label.Data(), 0.0, 0.0, 0.0 , idrotm, "ONLY", envelopD, 10); } // end for j } // if not last layer } // end if i } // for i } //______________________________________________________________________ void AliEMCALv0::Init(void) { // Just prints an information message if(fDebug) { TString message("\n") ; message += "*****************************************\n" ; // Here the EMCAL initialisation code (if any!) AliEMCALGeometry * geom = GetGeometry() ; if (geom!=0) { message += "AliEMCAL " ; message += Version() ; message += "EMCAL geometry initialized for " ; message += geom->GetName() ; } else { message += "AliEMCAL " ; message += Version() ; message += "EMCAL geometry initialization failed !" ; } message += "\n*****************************************" ; Info("Init", message.Data() ) ; } }