/**************************************************************************
* 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. *
**************************************************************************/
/* $Id$ */
///////////////////////////////////////////////////////////////////////////////
// //
// Muon ABSOrber //
// This class contains the description of the muon absorber geometry //
// //
//Begin_Html
/*
The responsible person for this module is
Andreas Morsch.
*/
//End_Html
// //
// //
///////////////////////////////////////////////////////////////////////////////
#include
#include "AliABSOv0.h"
#include "AliConst.h"
#include "AliRun.h"
ClassImp(AliABSOv0)
//_____________________________________________________________________________
AliABSOv0::AliABSOv0()
{
//
// Default constructor
//
}
//_____________________________________________________________________________
AliABSOv0::AliABSOv0(const char *name, const char *title)
: AliABSO(name,title)
{
//
// Standard constructor
//
SetMarkerColor(7);
SetMarkerStyle(2);
SetMarkerSize(0.4);
}
//_____________________________________________________________________________
void AliABSOv0::CreateGeometry()
{
//
// Creation of the geometry of the muon absorber
//
//Begin_Html
/*
*/
//End_Html
//Begin_Html
/*
*/
//End_Html
//
//
enum {kC=1605, kAl=1608, kFe=1609, kCu=1610, kW=1611, kPb=1612,
kNiCuW=1620, kVacuum=1615, kAir=1614, kConcrete=1616,
kPolyCH2=1617, kSteel=1609, kInsulation=1613, kPolyCc=1619};
Int_t *idtmed = fIdtmed->GetArray()-1599;
Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3];
Float_t dz;
Int_t idrotm[1699];
#include "ABSOSHILConst.h"
#include "ABSOConst.h"
//
// Structure of Tracking Region
//
Float_t dzFe = 25.;
// 3 < theta < 9
fNLayers[0] = 5;
fMLayers[0][0] = kAir; fZLayers[0][0] = kZAbsStart;
fMLayers[0][1] = kC; fZLayers[0][1] = kZAbsCc;
fMLayers[0][2] = kConcrete; fZLayers[0][2] = kZRear-kDRear-dzFe;
fMLayers[0][3] = kSteel; fZLayers[0][3] = kZRear-kDRear;
fMLayers[0][4] = kSteel; fZLayers[0][4] = kZRear;
// 2 < theta < 3
fNLayers[1] = 6;
fMLayers[1][0] = kAir ; fZLayers[1][0] = fZLayers[0][0]-10.;
fMLayers[1][1] = kAl ; fZLayers[1][1] = fZLayers[0][0];
fMLayers[1][2] = fMLayers[0][1]; fZLayers[1][2] = fZLayers[0][1];
fMLayers[1][3] = fMLayers[0][2]; fZLayers[1][3] = fZLayers[0][2];
fMLayers[1][4] = fMLayers[0][3]; fZLayers[1][4] = fZLayers[0][3];
fMLayers[1][5] = kNiCuW; fZLayers[1][5] = fZLayers[0][4];
//
Float_t dTube=0.1; // tube thickness
Float_t dInsu=0.5; // insulation thickness
Float_t dEnve=0.1; // protective envelope thickness
// Float_t dFree=0.5; // clearance thickness
// Mother volume and outer shielding: Pb
par[0] = 0.;
par[1] = 360.;
par[2] = 7.;
par[3] = -(kZRear-kZAbsStart)/2.;
par[4] = kRAbs;
par[5] = kZAbsStart * TMath::Tan(kTheta1);
par[6] = par[3]+(kZNose-kZAbsStart);
par[7] = kRAbs;
par[8] = kZNose * TMath::Tan(kTheta1);
par[9] = par[3]+(kZConeTPC-kZAbsStart);
par[10] = kRAbs;
par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(kTheta2);
par[12] = par[3]+(kZOpen-kZAbsStart);
par[13] = kRAbs;
par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(kAccMax);
par[15] = par[3]+(kZRear-kDRear-kZAbsStart);
par[16] = kRAbs + (par[15] - par[12]) * TMath::Tan(kThetaOpen1) ;
par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(kAccMax);
par[18] = par[3]+(kZRear-kDRear-kZAbsStart);
par[19] = (kZRear-kDRear) * TMath::Tan(kAccMin);
par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(kAccMax);
par[21] = -par[3];
par[22] = kZRear* TMath::Tan(kAccMin);
par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(kAccMax);
gMC->Gsvolu("ABSS", "PCON", idtmed[kPb], par, 24);
{ // Begin local scope for i
for (Int_t i=4; i<18; i+=3) par[i] = 0;
} // End local scope for i
gMC->Gsvolu("ABSM", "PCON", idtmed[kVacuum+40], par, 24);
gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY");
//
// Steel envelope
//
par[4] = par[5] -kDSteel;
par[7] = par[8] -kDSteel;
par[10]= par[11]-kDSteel;
par[13]= par[14]-kDSteel;
par[16]= par[17]-kDSteel;
par[19]= par[20]-kDSteel;
par[22]= par[23]-kDSteel;
gMC->Gsvolu("ABST", "PCON", idtmed[kSteel], par, 24);
gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY");
//
// Polyethylene shield
//
cpar[0] = (kZRear - kZConeTPC) / 2.;
cpar[1] = kZConeTPC * TMath::Tan(kAccMax);
cpar[2] = cpar[1] + kDPoly;
cpar[3] = kZRear * TMath::Tan(kAccMax);
cpar[4] = cpar[3] + kDPoly;
gMC->Gsvolu("APOL", "CONE", idtmed[kPolyCH2+40], cpar, 5);
dz = (kZRear-kZAbsStart)/2.-cpar[0];
gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// Tungsten nose to protect TPC
//
cpar[0] = (kZNose - kZAbsStart) / 2.;
cpar[1] = kZAbsStart * TMath::Tan(kAccMax);
cpar[2] = kZAbsStart * TMath::Tan(kTheta1)-kDSteel;
cpar[3] = kZNose * TMath::Tan(kAccMax);
cpar[4] = kZNose * TMath::Tan(kTheta1)-kDSteel;
gMC->Gsvolu("ANOS", "CONE", idtmed[kW], cpar, 5);
//
dz = -(kZRear-kZAbsStart)/2.+cpar[0];
gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// Tungsten inner shield
//
Float_t zW = kZTwoDeg+.1;
Float_t dZ = zW+(kZRear-kDRear-zW)/2.;
//
pcpar[0] = 0.;
pcpar[1] = 360.;
pcpar[2] = 3.;
pcpar[3] = zW-dZ;
pcpar[4] = kRAbs;
pcpar[5] = zW * TMath::Tan(kAccMin);
pcpar[6] = kZOpen-dZ;
pcpar[7] = kRAbs;
pcpar[8] = kZOpen * TMath::Tan(kAccMin);
pcpar[9] = kZRear-kDRear-dZ;
pcpar[10] = kRAbs+(kZRear-kDRear-kZOpen) * TMath::Tan(kThetaOpen1);
pcpar[11] = (kZRear-kDRear) * TMath::Tan(kAccMin);
gMC->Gsvolu("AWIN", "PCON", idtmed[kNiCuW+40], pcpar, 12);
dz=(zW+kZRear-kDRear)/2-(kZAbsStart+kZRear)/2.;
gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// First part replaced by Carbon
//
cpar[0] = (200.-zW)/2.;
cpar[1] = kRAbs;
cpar[2] = pcpar[5];
cpar[3] = kRAbs;
cpar[4] = 200. * TMath::Tan(kAccMin);
gMC->Gsvolu("ACNO", "CONE", idtmed[kC], cpar, 5);
dz = zW-dZ+cpar[0];
gMC->Gspos("ACNO", 1, "AWIN", 0., 0., dz, 0, "ONLY");
/*
Float_t zWW = 383.5;
cpar[0] = (kZRear-kDRear-zWW)/2.;
cpar[1] = kRAbs + (zWW-kZOpen) * TMath::Tan(kThetaOpen1);
cpar[2] = zWW * TMath::Tan(kAccMin);
cpar[3] = pcpar[10];
cpar[4] = pcpar[11];
gMC->Gsvolu("AWNO", "CONE", idtmed[kCu+40], cpar, 5);
dz = zWW-dZ+cpar[0];
gMC->Gspos("AWNO", 1, "AWIN", 0., 0., dz, 0, "ONLY");
*/
//
// Inner tracking region
//
// mother volume: Cu
//
//
pcpar[0] = 0.;
pcpar[1] = 360.;
pcpar[2] = 3.;
pcpar[3] = -(kZRear-kZAbsStart)/2.;
pcpar[4] = kRAbs;
pcpar[5] = kZAbsStart * TMath::Tan(kAccMax);
pcpar[6] = pcpar[3]+(kZTwoDeg-kZAbsStart);
pcpar[7] = kRAbs;
pcpar[8] = kZTwoDeg * TMath::Tan(kAccMax);
pcpar[9] = -pcpar[3];
pcpar[10] = kZRear * TMath::Tan(kAccMin);
pcpar[11] = kZRear * TMath::Tan(kAccMax);
gMC->Gsvolu("AITR", "PCON", idtmed[fMLayers[0][4]], pcpar, 12);
//
// special Pb medium for last 5 cm of Pb
Float_t zr=kZRear-2.-0.001;
cpar[0] = 1.0;
cpar[1] = zr * TMath::Tan(kThetaR);
cpar[2] = zr * TMath::Tan(kAccMax);
cpar[3] = cpar[1] + TMath::Tan(kThetaR) * 2;
cpar[4] = cpar[2] + TMath::Tan(kAccMax) * 2;
gMC->Gsvolu("ARPB", "CONE", idtmed[fMLayers[0][4]], cpar, 5);
dz=(kZRear-kZAbsStart)/2.-cpar[0]-0.001;
gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY");
//
// concrete cone: concrete
//
pcpar[9] = pcpar[3]+(kZRear-kDRear-kZAbsStart);
pcpar[10] = (kZRear-kDRear) * TMath::Tan(kAccMin);
pcpar[11] = (kZRear-kDRear) * TMath::Tan(kAccMax);
gMC->Gsvolu("ACON", "PCON", idtmed[fMLayers[0][2]+40], pcpar, 12);
gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY");
//
// Fe Cone
//
zr = kZRear-kDRear-dzFe;
cpar[0] = dzFe/2.;
cpar[1] = zr * TMath::Tan(kAccMin);
cpar[2] = zr * TMath::Tan(kAccMax);
cpar[3] = cpar[1] + TMath::Tan(kAccMin) * dzFe;
cpar[4] = cpar[2] + TMath::Tan(kAccMax) * dzFe;
gMC->Gsvolu("ACFE", "CONE",idtmed[fMLayers[0][3]], cpar, 5);
dz = (kZRear-kZAbsStart)/2.-kDRear-dzFe/2.;
gMC->Gspos("ACFE", 1, "ACON", 0., 0., dz, 0, "ONLY");
//
//
// carbon cone: carbon
//
pcpar[9] = pcpar[3]+(kZAbsCc-kZAbsStart);
pcpar[10] = kZAbsCc * TMath::Tan(kAccMin);
pcpar[11] = kZAbsCc * TMath::Tan(kAccMax);
gMC->Gsvolu("ACAR", "PCON", idtmed[fMLayers[0][1]+40], pcpar, 12);
gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY");
//
// carbon cone outer region
//
cpar[0] = 10.;
cpar[1] = kRAbs;
cpar[2] = kZAbsStart* TMath::Tan(kAccMax);
cpar[3] = kRAbs;
cpar[4] = cpar[2]+2. * cpar[0] * TMath::Tan(kAccMax);
gMC->Gsvolu("ACAO", "CONE", idtmed[fMLayers[0][1]], cpar, 5);
dz=-(kZRear-kZAbsStart)/2.+cpar[0];
gMC->Gspos("ACAO", 1, "ACAR", 0., 0., dz, 0, "ONLY");
//
// inner W shield
Float_t epsi=0.;
Float_t repsi=1.;
zr=kZRear-(kDRear-epsi);
cpar[0] = (kDRear-epsi)/2.;
cpar[1] = zr * TMath::Tan(kAccMin);
cpar[2] = zr * TMath::Tan(kThetaR*repsi);
cpar[3] = cpar[1] + TMath::Tan(kAccMin) * (kDRear-epsi);
cpar[4] = cpar[2] + TMath::Tan(kThetaR*repsi) * (kDRear-epsi);
gMC->Gsvolu("ARW0", "CONE", idtmed[fMLayers[1][4]+40], cpar, 5);
dz=(kZRear-kZAbsStart)/2.-cpar[0];
gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY");
//
// special W medium for last 5 cm of W
zr=kZRear-5;
cpar[0] = 2.5;
cpar[1] = zr * TMath::Tan(kAccMin);
cpar[2] = zr * TMath::Tan(kThetaR*repsi);
cpar[3] = cpar[1] + TMath::Tan(kAccMin) * 5.;
cpar[4] = cpar[2] + TMath::Tan(kThetaR*repsi) * 5.;
gMC->Gsvolu("ARW1", "CONE", idtmed[fMLayers[1][4]+20], cpar, 5);
dz=(kDRear-epsi)/2.-cpar[0];
gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY");
//
// Cu
Float_t drMin=TMath::Tan(kThetaR) * 5;
Float_t drMax=TMath::Tan(kAccMax) * 5;
gMC->Gsvolu("ARPE", "CONE", idtmed[fMLayers[0][4]], cpar, 0);
cpar[0]=2.5;
{ // Begin local scope for i
for (Int_t i=0; i<3; i++) {
zr=kZRear-kDRear+5+i*10.;
cpar[1] = zr * TMath::Tan(kThetaR);
cpar[2] = zr * TMath::Tan(kAccMax);
cpar[3] = cpar[1] + drMin;
cpar[4] = cpar[2] + drMax;
dz=(kZRear-kZAbsStart)/2.-cpar[0]-5.-(2-i)*10;
gMC->Gsposp("ARPE", i+1, "AITR", 0., 0., dz, 0, "ONLY",cpar,5);
}
} // End local scope for i
gMC->Gspos("AITR", 1, "ABSS", 0., 0., 0., 0, "ONLY");
dz = (kZRear-kZAbsStart)/2.+kZAbsStart;
gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY");
//
//
// vacuum system
//
// pipe and heating jackets
//
//
// cylindrical piece
tpar0[2]=(kZOpen-kZAbsStart)/2;
tpar0[0]=kRVacu;
tpar0[1]=kRVacu+dTube+dInsu+dEnve;
gMC->Gsvolu("AV11", "TUBE", idtmed[kSteel+40], tpar0, 3);
//
// insulation
tpar[2]=tpar0[2];
tpar[0]=kRVacu+dTube;
tpar[1]=tpar[0]+dInsu;
gMC->Gsvolu("AI11", "TUBE", idtmed[kInsulation+40], tpar, 3);
gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY");
//
dz=-(kZRear-kZAbsStart)/2.+tpar0[2];
gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY");
//
// conical piece
cpar0[0]=(kZRear-kDRear-kZOpen)/2;
cpar0[1]= kRVacu-0.05;
cpar0[2]= kRVacu+dTube+dInsu+dEnve;
Float_t dR=2.*cpar0[0]*TMath::Tan(kThetaOpen1);
cpar0[3]=cpar0[1]+dR;
cpar0[4]=cpar0[2]+dR;
gMC->Gsvolu("AV21", "CONE", idtmed[kSteel+40], cpar0, 5);
dTube+=0.05;
//
// insulation
cpar[0]=cpar0[0];
cpar[1]=cpar0[1]+dTube;
cpar[2]=cpar0[1]+dTube+dInsu;
cpar[3]=cpar0[3]+dTube;
cpar[4]=cpar0[3]+dTube+dInsu;
gMC->Gsvolu("AI21", "CONE", idtmed[kInsulation+40], cpar, 5);
gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY");
dz=(kZRear-kZAbsStart)/2.-cpar0[0]-kDRear;
gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY");
//
// Support cone
par[0] = 22.5;
par[1] = 360.0;
par[2] = 8.0;
par[3] = 4.0;
par[4] = kZRear;
par[5] = 100.;
par[6] = 180.;
par[7] = kZRear+20.;
par[8] = 100.;
par[9] = 180.;
par[10] = kZRear+20.;
par[11] = 178.;
par[12] = 180.;
par[13] = 600.;
par[14] = 178.;
par[15] = 180.;
gMC->Gsvolu("ASSS", "PGON", idtmed[kAl], par, 16);
gMC->Gspos("ASSS", 1, "ALIC", 0., 0., 0., 0, "ONLY");
Float_t trap[11];
trap[ 0] = (530.-170.)/2.;
trap[ 2] = 0.;
trap[ 3] = 2.;
trap[ 4] = (600.-(kZRear+2.))/2.;;
trap[ 5] = trap[4];
trap[ 6] = 0.;
trap[ 7] = 2.;
trap[ 8] = 5.;
trap[ 9] = 5.;
trap[10] = 0.;
trap[ 1] = -TMath::ATan((trap[4]-trap[8])/2./trap[0])*180./TMath::Pi();
AliMatrix(idrotm[1600], 180., 0., 90., 0., 90., 90.);
AliMatrix(idrotm[1601], 180., 0., 90., 0., 90., 270.);
gMC->Gsvolu("ASST", "TRAP", idtmed[kSteel], trap, 11);
dz = (600.+kZRear+2.)/2.+(trap[4]-trap[8])/2.;
// Float_t dy = 170.+trap[0];
// gMC->Gspos("ASST", 1, "ALIC", 0., dy, dz, idrotm[1600], "ONLY");
// gMC->Gspos("ASST", 2, "ALIC", 0., -dy, dz, idrotm[1601], "ONLY");
}
//_____________________________________________________________________________
void AliABSOv0::Init()
{
//
// Initialisation of the muon absorber after it has been built
Int_t i;
//
if(fDebug) {
printf("\n%s: ",ClassName());
for(i=0;i<35;i++) printf("*");
printf(" ABSOv0_INIT ");
for(i=0;i<35;i++) printf("*");
printf("\n%s: ",ClassName());
//
for(i=0;i<80;i++) printf("*");
printf("\n");
}
}