/************************************************************************** * 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. * **************************************************************************/ /* $Id$ */ //_________________________________________________________________________ // Base Class for PHOS description: // PHOS consists of a PbWO4 calorimeter (EMCA) and a gazeous charged // particles detector (CPV or PPSD). // The only provided method here is CreateMaterials, // which defines the materials common to all PHOS versions. // //*-- Author: Laurent Aphecetche & Yves Schutz (SUBATECH) ////////////////////////////////////////////////////////////////////////////// // --- ROOT system --- // --- Standard library --- // --- AliRoot header files --- #include "AliPHOS.h" #include "AliMC.h" #include "AliRun.h" #include "AliMagF.h" ClassImp(AliPHOS) //____________________________________________________________________________ AliPHOS::AliPHOS():AliDetector() { // ctor //We do not create objects, because these pointers will be overwritten durin reading from file. fEmcRecPoints = 0 ; fPpsdRecPoints = 0 ; fTrackSegments = 0 ; fRecParticles = 0 ; } //____________________________________________________________________________ AliPHOS::AliPHOS(const char* name, const char* title): AliDetector(name,title) { // ctor fEmcRecPoints = new AliPHOSRecPoint::RecPointsList(10) ; fPpsdRecPoints = new AliPHOSRecPoint::RecPointsList(10) ; fTrackSegments = new AliPHOSTrackSegment::TrackSegmentsList("AliPHOSTrackSegment", 10) ; fRecParticles = new AliPHOSRecParticle::RecParticlesList("AliPHOSRecParticle", 10) ; } //____________________________________________________________________________ AliPHOS::~AliPHOS() { // dtor if(fEmcRecPoints) fEmcRecPoints->Delete() ; delete fEmcRecPoints ; if(fPpsdRecPoints) fPpsdRecPoints->Delete() ; delete fPpsdRecPoints ; if(fTrackSegments) fTrackSegments->Delete() ; delete fTrackSegments ; if(fRecParticles) fRecParticles->Delete() ; delete fRecParticles ; delete fHits ; delete fDigits ; } //____________________________________________________________________________ void AliPHOS::CreateMaterials() { // Definitions of materials to build PHOS and associated tracking media. // media number in idtmed are 699 to 798. // --- The PbWO4 crystals --- Float_t aX[3] = {207.19, 183.85, 16.0} ; Float_t zX[3] = {82.0, 74.0, 8.0} ; Float_t wX[3] = {1.0, 1.0, 4.0} ; Float_t dX = 8.28 ; AliMixture(0, "PbWO4$", aX, zX, dX, -3, wX) ; // --- The polysterene scintillator (CH) --- Float_t aP[2] = {12.011, 1.00794} ; Float_t zP[2] = {6.0, 1.0} ; Float_t wP[2] = {1.0, 1.0} ; Float_t dP = 1.032 ; AliMixture(1, "Polystyrene$", aP, zP, dP, -2, wP) ; // --- Aluminium --- AliMaterial(2, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ; // --- Absorption length is ignored ^ // --- Tyvek (CnH2n) --- Float_t aT[2] = {12.011, 1.00794} ; Float_t zT[2] = {6.0, 1.0} ; Float_t wT[2] = {1.0, 2.0} ; Float_t dT = 0.331 ; AliMixture(3, "Tyvek$", aT, zT, dT, -2, wT) ; // --- Polystyrene foam --- Float_t aF[2] = {12.011, 1.00794} ; Float_t zF[2] = {6.0, 1.0} ; Float_t wF[2] = {1.0, 1.0} ; Float_t dF = 0.12 ; AliMixture(4, "Foam$", aF, zF, dF, -2, wF) ; // --- Titanium --- Float_t aTIT[3] = {47.88, 26.98, 54.94} ; Float_t zTIT[3] = {22.0, 13.0, 25.0} ; Float_t wTIT[3] = {69.0, 6.0, 1.0} ; Float_t dTIT = 4.5 ; AliMixture(5, "Titanium$", aTIT, zTIT, dTIT, -3, wTIT); // --- Silicon --- AliMaterial(6, "Si$", 28.0855, 14., 2.33, 9.36, 42.3, 0, 0) ; // --- Foam thermo insulation --- Float_t aTI[2] = {12.011, 1.00794} ; Float_t zTI[2] = {6.0, 1.0} ; Float_t wTI[2] = {1.0, 1.0} ; Float_t dTI = 0.1 ; AliMixture(7, "Thermo Insul.$", aTI, zTI, dTI, -2, wTI) ; // --- Textolitn --- Float_t aTX[4] = {16.0, 28.09, 12.011, 1.00794} ; Float_t zTX[4] = {8.0, 14.0, 6.0, 1.0} ; Float_t wTX[4] = {292.0, 68.0, 462.0, 736.0} ; Float_t dTX = 1.75 ; AliMixture(8, "Textolit$", aTX, zTX, dTX, -4, wTX) ; //--- FR4 --- Float_t aFR[3] = {28.0855, 15.9994, 17.749} ; Float_t zFR[3] = {14., 8., 8.875} ; Float_t wFR[3] = {.28, .32, .4} ; Float_t dFR = 1.8 ; AliMixture(9, "FR4$", aFR, zFR, dFR, -3, wFR) ; // --- The Composite Material for micromegas (so far polyetylene) --- Float_t aCM[2] = {12.01, 1.} ; Float_t zCM[2] = {6., 1.} ; Float_t wCM[2] = {1., 2.} ; Float_t dCM = 0.935 ; AliMixture(10, "Compo Mat$", aCM, zCM, dCM, -2, wCM) ; // --- Copper --- AliMaterial(11, "Cu$", 63.546, 29, 8.96, 1.43, 14.8, 0, 0) ; // --- G10 : Printed Circuit material --- Float_t aG10[4] = { 12., 1., 16., 28.} ; Float_t zG10[4] = { 6., 1., 8., 14.} ; Float_t wG10[4] = { .259, .288, .248, .205} ; Float_t dG10 = 1.7 ; AliMixture(12, "G10$", aG10, zG10, dG10, -4, wG10); // --- Lead --- AliMaterial(13, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ; // --- The gas mixture --- // Co2 Float_t aCO[2] = {12.0, 16.0} ; Float_t zCO[2] = {6.0, 8.0} ; Float_t wCO[2] = {1.0, 2.0} ; Float_t dCO = 0.001977 ; AliMixture(14, "CO2$", aCO, zCO, dCO, -2, wCO); // Ar Float_t dAr = 0.001782 ; AliMaterial(15, "Ar$", 39.948, 18.0, dAr, 14.0, 0., 0, 0) ; // ArCo2 Char_t namate[21]; Float_t aGM[2] ; Float_t zGM[2] ; Float_t wGM[2] ; Float_t dGM ; Float_t absL, radL, density ; Float_t buf[1] ; Int_t nbuf ; gMC->Gfmate((*fIdmate)[15], namate, aGM[0], zGM[0], density, radL, absL, buf, nbuf) ; // Get properties of Ar gMC->Gfmate((*fIdmate)[14], namate, aGM[1], zGM[1], density, radL, absL, buf, nbuf) ; // Get properties of CO2 // Create gas mixture Float_t arContent = 0.80 ; // Ar-content of the Ar/CO2-mixture (80% / 20%) wGM[0] = arContent; wGM[1] = 1. - arContent ; dGM = wGM[0] * dAr + wGM[1] * dCO; AliMixture(16, "ArCO2$", aGM, zGM, dGM, 2, wGM) ; // --- Air --- AliMaterial(99, "Air$", 14.61, 7.3, 0.001205, 30420., 67500., 0, 0) ; // DEFINITION OF THE TRACKING MEDIA // for PHOS: idtmed[699->798] equivalent to fIdtmed[0->100] Int_t * idtmed = fIdtmed->GetArray() - 699 ; Int_t isxfld = gAlice->Field()->Integ() ; Float_t sxmgmx = gAlice->Field()->Max() ; // The scintillator of the calorimeter made of PBW04 -> idtmed[699] AliMedium(0, "PHOS Xtal $", 0, 1, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[700] AliMedium(1, "CPV scint. $", 1, 1, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // Various Aluminium parts made of Al -> idtmed[701] AliMedium(2, "Al parts $", 2, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ; // The Tywek which wraps the calorimeter crystals -> idtmed[702] AliMedium(3, "Tyvek wrapper$", 3, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ; // The Polystyrene foam around the calorimeter module -> idtmed[703] AliMedium(4, "Polyst. foam $", 4, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // The Titanium around the calorimeter crystal -> idtmed[704] AliMedium(5, "Titan. cover $", 5, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.0001, 0.0001, 0, 0) ; // The Silicon of the pin diode to read out the calorimeter crystal -> idtmed[705] AliMedium(6, "Si PIN $", 6, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.01, 0.01, 0, 0) ; // The thermo insulating material of the box which contains the calorimeter module -> idtmed[706] AliMedium(7, "Thermo Insul.$", 7, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // The Textolit which makes up the box which contains the calorimeter module -> idtmed[707] AliMedium(8, "Textolit $", 8, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // FR4: The Plastic which makes up the frame of micromegas -> idtmed[708] AliMedium(9, "FR4 $", 9, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ; // The Composite Material for micromegas -> idtmed[709] AliMedium(10, "CompoMat $", 10, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // Copper -> idtmed[710] AliMedium(11, "Copper $", 11, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ; // G10: Printed Circuit material -> idtmed[711] AliMedium(12, "G10 $", 12, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ; // The Lead -> idtmed[712] AliMedium(13, "Lead $", 13, 0, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; // The gas mixture: ArCo2 -> idtmed[715] AliMedium(16, "ArCo2 $", 16, 1, isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ; // Air -> idtmed[798] AliMedium(99, "Air $", 99, 0, isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ; // --- Set decent energy thresholds for gamma and electron tracking // Tracking threshold for photons and electrons in the scintillator crystal gMC->Gstpar(idtmed[699], "CUTGAM",0.5E-4) ; gMC->Gstpar(idtmed[699], "CUTELE",1.0E-4) ; // --- Generate explicitly delta rays in the titan cover --- gMC->Gstpar(idtmed[704], "LOSS",3.) ; gMC->Gstpar(idtmed[704], "DRAY",1.) ; // --- and in aluminium parts --- gMC->Gstpar(idtmed[701], "LOSS",3.) ; gMC->Gstpar(idtmed[701], "DRAY",1.) ; // --- and in PIN diode gMC->Gstpar(idtmed[705], "LOSS",3) ; gMC->Gstpar(idtmed[705], "DRAY",1) ; // --- and in the passive convertor gMC->Gstpar(idtmed[712], "LOSS",3) ; gMC->Gstpar(idtmed[712], "DRAY",1) ; // Tracking threshold for photons and electrons in the gas ArC02 gMC->Gstpar(idtmed[715], "CUTGAM",1.E-5) ; gMC->Gstpar(idtmed[715], "CUTELE",1.E-5) ; gMC->Gstpar(idtmed[715], "CUTNEU",1.E-5) ; gMC->Gstpar(idtmed[715], "CUTHAD",1.E-5) ; gMC->Gstpar(idtmed[715], "CUTMUO",1.E-5) ; gMC->Gstpar(idtmed[715], "BCUTE",1.E-5) ; gMC->Gstpar(idtmed[715], "BCUTM",1.E-5) ; gMC->Gstpar(idtmed[715], "DCUTE",1.E-5) ; gMC->Gstpar(idtmed[715], "DCUTM",1.E-5) ; gMC->Gstpar(idtmed[715], "PPCUTM",1.E-5) ; gMC->Gstpar(idtmed[715], "LOSS",2.) ; gMC->Gstpar(idtmed[715], "DRAY",0.) ; gMC->Gstpar(idtmed[715], "STRA",2.) ; } //____________________________________________________________________________ void AliPHOS::SetTreeAddress() { // TBranch *branch; AliDetector::SetTreeAddress(); // //Branch address for TreeR: RecParticles // TTree *treeR = gAlice->TreeR(); // if ( treeR && fRecParticles ) { // branch = treeR->GetBranch("PHOSRP"); // if (branch) branch->SetAddress(&fRecParticles) ; // } // //Branch address for TreeR: TrackSegments // if ( treeR && fTrackSegments ) { // branch = treeR->GetBranch("PHOSTS"); // if (branch) branch->SetAddress(&fTrackSegments) ; // } // //Branch address for TreeR: EmcRecPoint // if ( treeR && fEmcRecPoints ) { // branch = treeR->GetBranch("PHOSEmcRP"); // if (branch) branch->SetAddress(&fEmcRecPoints) ; // } }