/**************************************************************************
* 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"
ClassImp(AliPHOS)
//____________________________________________________________________________
AliPHOS::~AliPHOS()
{
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",5.E-7) ;
gMC->Gstpar(idtmed[715], "CUTELE",5.E-7) ;
gMC->Gstpar(idtmed[715], "CUTNEU",5.E-7) ;
gMC->Gstpar(idtmed[715], "CUTHAD",5.E-7) ;
gMC->Gstpar(idtmed[715], "CUTMUO",5.E-7) ;
gMC->Gstpar(idtmed[715], "BCUTE",5.E-7) ;
gMC->Gstpar(idtmed[715], "BCUTM",5.E-7) ;
gMC->Gstpar(idtmed[715], "DCUTE",5.E-7) ;
gMC->Gstpar(idtmed[715], "DCUTM",5.E-7) ;
gMC->Gstpar(idtmed[715], "PPCUTM",5.E-7) ;
gMC->Gstpar(idtmed[715], "LOSS",2.) ;
gMC->Gstpar(idtmed[715], "DRAY",0.) ;
gMC->Gstpar(idtmed[715], "STRA",2.) ;
}
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