/**************************************************************************
* 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 1.3 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
Standar 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
Int_t *idtmed = fIdtmed->GetArray()-1599;
Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3];
Float_t dz;
#include "ShieldConst.h"
// Mother volume and outer shielding: Pb
par[0] = 0.;
par[1] = 360.;
par[2] = 7.;
par[3] = -(abs_l-abs_d)/2.;
par[4] = r_abs;
par[5] = abs_d * TMath::Tan(theta1);
par[6] = par[3]+(z_nose-abs_d);
par[7] = r_abs;
par[8] = z_nose * TMath::Tan(theta1);
par[9] = par[3]+(z_cone-abs_d);
par[10] = r_abs;
par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2);
par[12] = par[3]+(abs_c-abs_d);
par[13] = r_abs;
par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(acc_max);
par[15] = par[3]+(abs_l-d_rear-abs_d);
par[16] = r_abs + (par[15] - par[12]) * TMath::Tan(theta_open1) ;
par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(acc_max);
par[18] = par[3]+(abs_l-d_rear-abs_d);
par[19] = (abs_l-d_rear) * TMath::Tan(acc_min);
par[20] = par[14] + (par[18] - par[12]) * TMath::Tan(acc_max);
par[21] = -par[3];
par[22] = abs_l* TMath::Tan(acc_min);
par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(acc_max);
gMC->Gsvolu("ABSS", "PCON", idtmed[1612], 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[1655], par, 24);
gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY");
//
// Steel envelope
//
par[4] = par[5] -d_steel;
par[7] = par[8] -d_steel;
par[10]= par[11]-d_steel;
par[13]= par[14]-d_steel;
par[16]= par[17]-d_steel;
par[19]= par[20]-d_steel;
par[22]= par[23]-d_steel;
gMC->Gsvolu("ABST", "PCON", idtmed[1618], par, 24);
gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY");
//
// Polyethylene shield
//
cpar[0] = (abs_l - z_cone) / 2.;
cpar[1] = z_cone * TMath::Tan(acc_max);
cpar[2] = cpar[1] + d_poly;
cpar[3] = abs_l * TMath::Tan(acc_max);
cpar[4] = cpar[3] + d_poly;
gMC->Gsvolu("APOL", "CONE", idtmed[1657], cpar, 5);
dz = (abs_l-abs_d)/2.-cpar[0];
gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// Tungsten nose to protect TPC
//
cpar[0] = (z_nose - abs_d) / 2.;
cpar[1] = abs_d * TMath::Tan(acc_max);
cpar[2] = abs_d * TMath::Tan(theta1)-d_steel;
cpar[3] = z_nose * TMath::Tan(acc_max);
cpar[4] = z_nose * TMath::Tan(theta1)-d_steel;
gMC->Gsvolu("ANOS", "CONE", idtmed[1611], cpar, 5);
//
dz = -(abs_l-abs_d)/2.+cpar[0];
gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY");
//
// Tungsten inner shield
//
cpar[0] = (abs_l-d_rear - abs_c)/ 2.;
cpar[1] = r_abs;
cpar[2] = abs_c * TMath::Tan(acc_min);
cpar[3] = r_abs + 2. * cpar[0] * TMath::Tan(theta_open1);
cpar[4] = (abs_l-d_rear) * TMath::Tan(acc_min);
gMC->Gsvolu("AWIN", "CONE", idtmed[1651], cpar, 5);
//
dz = (abs_l-abs_d)/2.-cpar[0]-d_rear;
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] = -(abs_l-abs_d)/2.;
pcpar[4] = r_abs;
pcpar[5] = abs_d * TMath::Tan(acc_max);
pcpar[6] = pcpar[3]+(z_2deg-abs_d);
pcpar[7] = r_abs;
pcpar[8] = z_2deg * TMath::Tan(acc_max);
pcpar[9] = -pcpar[3];
pcpar[10] = abs_l * TMath::Tan(acc_min);
pcpar[11] = abs_l * TMath::Tan(acc_max);
gMC->Gsvolu("AITR", "PCON", idtmed[1612], pcpar, 12);
//
// special Pb medium for last 5 cm of Pb
zr=abs_l-5;
cpar[0] = 2.5;
cpar[1] = zr * TMath::Tan(theta_r);
cpar[2] = zr * TMath::Tan(acc_max);
cpar[3] = cpar[1] + TMath::Tan(theta_r) * 5;
cpar[4] = cpar[2] + TMath::Tan(acc_max) * 5;
gMC->Gsvolu("ARPB", "CONE", idtmed[1632], cpar, 5);
dz=(abs_l-abs_d)/2.-cpar[0];
gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY");
//
// concrete cone: concrete
//
pcpar[9] = par[3]+(abs_l-d_rear-abs_d);
pcpar[10] = (abs_l-d_rear) * TMath::Tan(acc_min);
pcpar[11] = (abs_l-d_rear) * TMath::Tan(acc_max);
gMC->Gsvolu("ACON", "PCON", idtmed[1616], pcpar, 12);
gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY");
//
// carbon cone: carbon
//
pcpar[9] = pcpar[3]+(abs_cc-abs_d);
pcpar[10] = abs_cc * TMath::Tan(acc_min);
pcpar[11] = abs_cc * TMath::Tan(acc_max);
gMC->Gsvolu("ACAR", "PCON", idtmed[1605], pcpar, 12);
gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY");
//
// inner W shield
zr=abs_l-d_rear;
cpar[0] = d_rear/2.;
cpar[1] = zr * TMath::Tan(acc_min);
cpar[2] = zr * TMath::Tan(theta_r);
cpar[3] = cpar[1] + TMath::Tan(acc_min) * d_rear;
cpar[4] = cpar[2] + TMath::Tan(theta_r) * d_rear;
gMC->Gsvolu("ARW0", "CONE", idtmed[1611], cpar, 5);
dz=(abs_l-abs_d)/2.-cpar[0];
gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY");
//
// special W medium for last 5 cm of W
zr=abs_l-5;
cpar[0] = 2.5;
cpar[1] = zr * TMath::Tan(acc_min);
cpar[2] = zr * TMath::Tan(theta_r);
cpar[3] = cpar[1] + TMath::Tan(acc_min) * 5.;
cpar[4] = cpar[2] + TMath::Tan(theta_r) * 5.;
gMC->Gsvolu("ARW1", "CONE", idtmed[1631], cpar, 5);
dz=d_rear/2.-cpar[0];
gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY");
//
// PolyEthylene Layers
Float_t dr_min=TMath::Tan(theta_r) * 5;
Float_t dr_max=TMath::Tan(acc_max) * 5;
gMC->Gsvolu("ARPE", "CONE", idtmed[1617], cpar, 0);
cpar[0]=2.5;
{ // Begin local scope for i
for (Int_t i=0; i<3; i++) {
zr=abs_l-d_rear+5+i*10.;
cpar[1] = zr * TMath::Tan(theta_r);
cpar[2] = zr * TMath::Tan(acc_max);
cpar[3] = cpar[1] + dr_min;
cpar[4] = cpar[2] + dr_max;
dz=(abs_l-abs_d)/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 = (abs_l-abs_d)/2.+abs_d;
gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY");
//
//
// vacuum system
//
// pipe and heating jackets
//
//
// cylindrical piece
tpar0[2]=(abs_c-abs_d)/2;
tpar0[0]=r_vacu;
tpar0[1]=r_abs;
gMC->Gsvolu("AV11", "TUBE", idtmed[1658], tpar0, 3);
//
// insulation
tpar[2]=tpar0[2];
tpar[0]=tpar0[0]+d_tube;
tpar[1]=tpar0[0]+d_tube+d_insu;
gMC->Gsvolu("AI11", "TUBE", idtmed[1653], tpar, 3);
gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY");
//
// clearance
tpar[0]=tpar0[1]-d_prot-d_free;
tpar[1]=tpar0[1]-d_prot;
gMC->Gsvolu("AP11", "TUBE", idtmed[1655], tpar, 3);
gMC->Gspos("AP11", 1, "AV11", 0., 0., 0., 0, "ONLY");
dz=-(abs_l-abs_d)/2.+tpar0[2];
gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY");
//
// conical piece
cpar0[0]=(abs_l-d_rear-abs_c)/2;
cpar0[1]=r_vacu;
cpar0[2]=r_abs;
cpar0[3]=cpar0[1]+2.*cpar0[0]*TMath::Tan(theta_open1);
cpar0[4]=cpar0[2]+2.*cpar0[0]*TMath::Tan(theta_open1);
gMC->Gsvolu("AV21", "CONE", idtmed[1658], cpar0, 5);
//
// insulation
cpar[0]=cpar0[0];
cpar[1]=cpar0[1]+d_tube;
cpar[2]=cpar0[1]+d_tube+d_insu;
cpar[3]=cpar0[3]+d_tube;
cpar[4]=cpar0[3]+d_tube+d_insu;
gMC->Gsvolu("AI21", "CONE", idtmed[1653], cpar, 5);
gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY");
//
// clearance
cpar[1]=cpar0[2]-d_prot-d_free;
cpar[2]=cpar0[2]-d_prot;
cpar[3]=cpar0[4]-d_prot-d_free;
cpar[4]=cpar0[4]-d_prot;
gMC->Gsvolu("AP21", "CONE", idtmed[1655], cpar, 5);
gMC->Gspos("AP21", 1, "AV21", 0., 0., 0., 0, "ONLY");
dz=(abs_l-abs_d)/2.-cpar0[0]-d_rear;
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");
}