/**************************************************************************
* 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. *
**************************************************************************/
/*
$Log$
Revision 1.4 2000/04/03 08:13:40 fca
Introduce extra scope for non ANSI compliant C++ compilers
Revision 1.3 2000/01/18 17:49:56 morsch
Serious overlap of ABSM with shield corrected
Small error in ARPB parameters corrected
Revision 1.2 2000/01/13 11:23:59 morsch
Last layer of Pb outer angle corrected
Revision 1.1 2000/01/12 15:39:30 morsch
Standard version of ABSO
*/
///////////////////////////////////////////////////////////////////////////////
// //
// 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 "AliABSOv0.h"
#include "AliRun.h"
#include "AliConst.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
//
//
typedef 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};
Int_t *idtmed = fIdtmed->GetArray()-1599;
Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3];
Float_t dz;
#include "ABSOSHILConst.h"
#include "ABSOConst.h"
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] = -(zRear-zAbsStart)/2.;
par[4] = rAbs;
par[5] = zAbsStart * TMath::Tan(theta1);
par[6] = par[3]+(zNose-zAbsStart);
par[7] = rAbs;
par[8] = zNose * TMath::Tan(theta1);
par[9] = par[3]+(zConeTPC-zAbsStart);
par[10] = rAbs;
par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2);
par[12] = par[3]+(zOpen-zAbsStart);
par[13] = rAbs;
par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(accMax);
par[15] = par[3]+(zRear-dRear-zAbsStart);
par[16] = rAbs + (par[15] - par[12]) * TMath::Tan(thetaOpen1) ;
par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(accMax);
par[18] = par[3]+(zRear-dRear-zAbsStart);
par[19] = (zRear-dRear) * TMath::Tan(accMin);
par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(accMax);
par[21] = -par[3];
par[22] = zRear* TMath::Tan(accMin);
par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(accMax);
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] -dSteel;
par[7] = par[8] -dSteel;
par[10]= par[11]-dSteel;
par[13]= par[14]-dSteel;
par[16]= par[17]-dSteel;
par[19]= par[20]-dSteel;
par[22]= par[23]-dSteel;
gMC->Gsvolu("ABST", "PCON", idtmed[kSteel], par, 24);
gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY");
//
// Polyethylene shield
//
cpar[0] = (zRear - zConeTPC) / 2.;
cpar[1] = zConeTPC * TMath::Tan(accMax);
cpar[2] = cpar[1] + dPoly;
cpar[3] = zRear * TMath::Tan(accMax);
cpar[4] = cpar[3] + dPoly;
gMC->Gsvolu("APOL", "CONE", idtmed[kPolyCH2+40], cpar, 5);
dz = (zRear-zAbsStart)/2.-cpar[0];
gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// Tungsten nose to protect TPC
//
cpar[0] = (zNose - zAbsStart) / 2.;
cpar[1] = zAbsStart * TMath::Tan(accMax);
cpar[2] = zAbsStart * TMath::Tan(theta1)-dSteel;
cpar[3] = zNose * TMath::Tan(accMax);
cpar[4] = zNose * TMath::Tan(theta1)-dSteel;
gMC->Gsvolu("ANOS", "CONE", idtmed[kW], cpar, 5);
//
dz = -(zRear-zAbsStart)/2.+cpar[0];
gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// Tungsten inner shield
//
Float_t zW=zTwoDeg+.1;
Float_t dZ = zW+(zRear-dRear-zW)/2.;
//
pcpar[0] = 0.;
pcpar[1] = 360.;
pcpar[2] = 3.;
pcpar[3] = zW-dZ;
pcpar[4] = rAbs;
pcpar[5] = zW * TMath::Tan(accMin);
pcpar[6] = zOpen-dZ;
pcpar[7] = rAbs;
pcpar[8] = zOpen * TMath::Tan(accMin);
pcpar[9] = zRear-dRear-dZ;
pcpar[10] = rAbs+(zRear-dRear-zOpen) * TMath::Tan(thetaOpen1);
pcpar[11] = (zRear-dRear) * TMath::Tan(accMin);
gMC->Gsvolu("AWIN", "PCON", idtmed[kNiCuW+40], pcpar, 12);
//
dz=(zW+zRear-dRear)/2-(zAbsStart+zRear)/2.;
gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY");
// Inner tracking region
//
// mother volume: Pb
//
pcpar[0] = 0.;
pcpar[1] = 360.;
pcpar[2] = 3.;
pcpar[3] = -(zRear-zAbsStart)/2.;
pcpar[4] = rAbs;
pcpar[5] = zAbsStart * TMath::Tan(accMax);
pcpar[6] = pcpar[3]+(zTwoDeg-zAbsStart);
pcpar[7] = rAbs;
pcpar[8] = zTwoDeg * TMath::Tan(accMax);
pcpar[9] = -pcpar[3];
pcpar[10] = zRear * TMath::Tan(accMin);
pcpar[11] = zRear * TMath::Tan(accMax);
gMC->Gsvolu("AITR", "PCON", idtmed[kPb], pcpar, 12);
//
// special Pb medium for last 5 cm of Pb
Float_t zr=zRear-2.-0.001;
cpar[0] = 1.0;
cpar[1] = zr * TMath::Tan(thetaR);
cpar[2] = zr * TMath::Tan(accMax);
cpar[3] = cpar[1] + TMath::Tan(thetaR) * 2;
cpar[4] = cpar[2] + TMath::Tan(accMax) * 2;
gMC->Gsvolu("ARPB", "CONE", idtmed[kPb], cpar, 5);
dz=(zRear-zAbsStart)/2.-cpar[0]-0.001;
gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY");
//
// concrete cone: concrete
//
pcpar[9] = pcpar[3]+(zRear-dRear-zAbsStart);
pcpar[10] = (zRear-dRear) * TMath::Tan(accMin);
pcpar[11] = (zRear-dRear) * TMath::Tan(accMax);
gMC->Gsvolu("ACON", "PCON", idtmed[kConcrete+40], pcpar, 12);
gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY");
//
// carbon cone: carbon
//
pcpar[9] = pcpar[3]+(zAbsCc-zAbsStart);
pcpar[10] = zAbsCc * TMath::Tan(accMin);
pcpar[11] = zAbsCc * TMath::Tan(accMax);
gMC->Gsvolu("ACAR", "PCON", idtmed[kC+40], pcpar, 12);
gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY");
//
// carbon cone outer region
//
cpar[0] = 10.;
cpar[1] = rAbs;
cpar[2] = zAbsStart* TMath::Tan(accMax);
cpar[3] = rAbs;
cpar[4] = cpar[2]+2. * cpar[0] * TMath::Tan(accMax);
gMC->Gsvolu("ACAO", "CONE", idtmed[kC], cpar, 5);
dz=-(zRear-zAbsStart)/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=zRear-(dRear-epsi);
cpar[0] = (dRear-epsi)/2.;
cpar[1] = zr * TMath::Tan(accMin);
cpar[2] = zr * TMath::Tan(thetaR*repsi);
cpar[3] = cpar[1] + TMath::Tan(accMin) * (dRear-epsi);
cpar[4] = cpar[2] + TMath::Tan(thetaR*repsi) * (dRear-epsi);
gMC->Gsvolu("ARW0", "CONE", idtmed[kNiCuW+40], cpar, 5);
dz=(zRear-zAbsStart)/2.-cpar[0];
gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY");
//
// special W medium for last 5 cm of W
zr=zRear-5;
cpar[0] = 2.5;
cpar[1] = zr * TMath::Tan(accMin);
cpar[2] = zr * TMath::Tan(thetaR*repsi);
cpar[3] = cpar[1] + TMath::Tan(accMin) * 5.;
cpar[4] = cpar[2] + TMath::Tan(thetaR*repsi) * 5.;
gMC->Gsvolu("ARW1", "CONE", idtmed[kNiCuW+20], cpar, 5);
dz=(dRear-epsi)/2.-cpar[0];
gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY");
//
// PolyEthylene Layers
Float_t drMin=TMath::Tan(thetaR) * 5;
Float_t drMax=TMath::Tan(accMax) * 5;
gMC->Gsvolu("ARPE", "CONE", idtmed[kPolyCH2], cpar, 0);
cpar[0]=2.5;
{ // Begin local scope for i
for (Int_t i=0; i<3; i++) {
zr=zRear-dRear+5+i*10.;
cpar[1] = zr * TMath::Tan(thetaR);
cpar[2] = zr * TMath::Tan(accMax);
cpar[3] = cpar[1] + drMin;
cpar[4] = cpar[2] + drMax;
dz=(zRear-zAbsStart)/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 = (zRear-zAbsStart)/2.+zAbsStart;
gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY");
//
//
// vacuum system
//
// pipe and heating jackets
//
//
// cylindrical piece
tpar0[2]=(zOpen-zAbsStart)/2;
tpar0[0]=rVacu;
tpar0[1]=rAbs;
gMC->Gsvolu("AV11", "TUBE", idtmed[kSteel+40], tpar0, 3);
//
// insulation
tpar[2]=tpar0[2];
tpar[0]=rVacu+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");
//
// clearance
tpar[0]=tpar[1]+dEnve;
tpar[1]=tpar[0]+dFree;
gMC->Gsvolu("AP11", "TUBE", idtmed[kAir+40], tpar, 3);
gMC->Gspos("AP11", 1, "AV11", 0., 0., 0., 0, "ONLY");
//
dz=-(zRear-zAbsStart)/2.+tpar0[2];
gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY");
//
// conical piece
cpar0[0]=(zRear-dRear-zOpen)/2;
cpar0[1]=rVacu-0.05;
cpar0[2]=rAbs;
Float_t dR=2.*cpar0[0]*TMath::Tan(thetaOpen1);
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");
//
// clearance
cpar[1]=cpar0[1]+dTube+dInsu+dEnve;
cpar[2]=rAbs;
cpar[3]=cpar0[1]+dTube+dInsu+dEnve+dR;
cpar[4]=rAbs+dR;
gMC->Gsvolu("AP21", "CONE", idtmed[kAir+40], cpar, 5);
gMC->Gspos("AP21", 1, "AV21", 0., 0., 0., 0, "ONLY");
dz=(zRear-zAbsStart)/2.-cpar0[0]-dRear;
gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY");
}
//_____________________________________________________________________________
void AliABSOv0::Init()
{
//
// Initialisation of the muon absorber after it has been built
Int_t i;
//
printf("\n");
for(i=0;i<35;i++) printf("*");
printf(" ABSOv0_INIT ");
for(i=0;i<35;i++) printf("*");
printf("\n");
//
for(i=0;i<80;i++) printf("*");
printf("\n");
}