[u/mrichter/AliRoot.git] / STRUCT / AliABSOv0.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/

/*
$Log$
*/

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Muon ABSOrber                                                            //
//  This class contains the description of the muon absorber geometry        //
//                                                                           //
//Begin_Html
/*
<img src="picts/AliABSOClass.gif">
</pre>
<br clear=left>
<font size=+2 color=red>
<p>The responsible person for this module is
<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
</font>
<pre>
*/
//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
  /*
    <img src="picts/AliABSOv0Tree.gif">
  */
  //End_Html
  //Begin_Html
  /*
    <img src="picts/AliABSOv0.gif">
  */
  //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[15] - 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);
  for (Int_t i=4; i<24; i+=3) par[i]  = 0;
  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]  = -par[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(acc_min) * 5;
  cpar[4] = cpar[2] + TMath::Tan(theta_r) * 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) * 35;
  cpar[4] = cpar[2] + TMath::Tan(theta_r) * 35;
  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;
  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);
  }
  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");
}
Commit	Line	Data
43d014f0	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/*
	17	$Log$
	18	*/
	19
	20	///////////////////////////////////////////////////////////////////////////////
	21	// //
	22	// Muon ABSOrber //
	23	// This class contains the description of the muon absorber geometry //
	24	// //
	25	//Begin_Html
	26	/*
	27	<img src="picts/AliABSOClass.gif">
	28	</pre>
	29	<br clear=left>
	30	<font size=+2 color=red>
	31	<p>The responsible person for this module is
	32	<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
	33	</font>
	34	<pre>
	35	*/
	36	//End_Html
	37	// //
	38	// //
	39	///////////////////////////////////////////////////////////////////////////////
	40
	41	#include "AliABSOv0.h"
	42	#include "AliRun.h"
	43	#include "AliConst.h"
	44
	45	ClassImp(AliABSOv0)
	46
	47	//_____________________________________________________________________________
	48	AliABSOv0::AliABSOv0()
	49	{
	50	//
	51	// Default constructor
	52	//
	53	}
	54
	55	//_____________________________________________________________________________
	56	AliABSOv0::AliABSOv0(const char name, const char title)
	57	: AliABSO(name,title)
	58	{
	59	//
	60	// Standard constructor
	61	//
	62	SetMarkerColor(7);
	63	SetMarkerStyle(2);
	64	SetMarkerSize(0.4);
65	}
66
67	//_____________________________________________________________________________
68	void AliABSOv0::CreateGeometry()
69	{
70	//
71	// Creation of the geometry of the muon absorber
72	//
73	//Begin_Html
74	/*
75	<img src="picts/AliABSOv0Tree.gif">
76	*/
77	//End_Html
78	//Begin_Html
79	/*
80	<img src="picts/AliABSOv0.gif">
81	*/
82	//End_Html
83
84
85	Int_t *idtmed = fIdtmed->GetArray()-1599;
86
87	Float_t par[24], cpar[5], cpar0[5], pcpar[12], tpar[3], tpar0[3];
88	Float_t dz;
89	#include "ShieldConst.h"
90	// Mother volume and outer shielding: Pb
91
92	par[0] = 0.;
93	par[1] = 360.;
94	par[2] = 7.;
95
96	par[3] = -(abs_l-abs_d)/2.;
97	par[4] = r_abs;
98	par[5] = abs_d * TMath::Tan(theta1);
99
100	par[6] = par[3]+(z_nose-abs_d);
101	par[7] = r_abs;
102	par[8] = z_nose * TMath::Tan(theta1);
103
104	par[9] = par[3]+(z_cone-abs_d);
105	par[10] = r_abs;
106	par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2);
107
108	par[12] = par[3]+(abs_c-abs_d);
109	par[13] = r_abs;
110	par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(acc_max);
111
112	par[15] = par[3]+(abs_l-d_rear-abs_d);
113	par[16] = r_abs + (par[15] - par[12]) * TMath::Tan(theta_open1) ;
114	par[17] = par[14] + (par[15] - par[12]) * TMath::Tan(acc_max);
115
116	par[18] = par[3]+(abs_l-d_rear-abs_d);
117	par[19] = (abs_l-d_rear) * TMath::Tan(acc_min);
118	par[20] = par[14] + (par[15] - par[12]) * TMath::Tan(acc_max);
119
120	par[21] = -par[3];
121	par[22] = abs_l* TMath::Tan(acc_min);
122	par[23] = par[20] + (par[21] - par[18]) * TMath::Tan(acc_max);
123	gMC->Gsvolu("ABSS", "PCON", idtmed[1612], par, 24);
124	for (Int_t i=4; i<24; i+=3) par[i] = 0;
125	gMC->Gsvolu("ABSM", "PCON", idtmed[1655], par, 24);
126	gMC->Gspos("ABSS", 1, "ABSM", 0., 0., 0., 0, "ONLY");
127
128	//
129	// Steel envelope
130	//
131	par[4] = par[5] -d_steel;
132	par[7] = par[8] -d_steel;
133	par[10]= par[11]-d_steel;
134	par[13]= par[14]-d_steel;
135	par[16]= par[17]-d_steel;
136	par[19]= par[20]-d_steel;
137	par[22]= par[23]-d_steel;
138	gMC->Gsvolu("ABST", "PCON", idtmed[1618], par, 24);
139	gMC->Gspos("ABST", 1, "ABSS", 0., 0., 0., 0, "ONLY");
140	//
141	// Polyethylene shield
142	//
143	cpar[0] = (abs_l - z_cone) / 2.;
144	cpar[1] = z_cone * TMath::Tan(acc_max);
145	cpar[2] = cpar[1] + d_poly;
146	cpar[3] = abs_l * TMath::Tan(acc_max);
147	cpar[4] = cpar[3] + d_poly;
148	gMC->Gsvolu("APOL", "CONE", idtmed[1657], cpar, 5);
149	dz = (abs_l-abs_d)/2.-cpar[0];
150	gMC->Gspos("APOL", 1, "ABSS", 0., 0., dz, 0, "ONLY");
151
152	//
153	// Tungsten nose to protect TPC
154	//
155	cpar[0] = (z_nose - abs_d) / 2.;
156	cpar[1] = abs_d * TMath::Tan(acc_max);
157	cpar[2] = abs_d * TMath::Tan(theta1)-d_steel;
158	cpar[3] = z_nose * TMath::Tan(acc_max);
159	cpar[4] = z_nose * TMath::Tan(theta1)-d_steel;
160	gMC->Gsvolu("ANOS", "CONE", idtmed[1611], cpar, 5);
161	//
162	dz = -(abs_l-abs_d)/2.+cpar[0];
163	gMC->Gspos("ANOS", 1, "ABSS", 0., 0., dz, 0, "ONLY");
164	//
165	// Tungsten inner shield
166	//
167	cpar[0] = (abs_l-d_rear - abs_c)/ 2.;
168	cpar[1] = r_abs;
169	cpar[2] = abs_c * TMath::Tan(acc_min);
170	cpar[3] = r_abs + 2. * cpar[0] * TMath::Tan(theta_open1);
171	cpar[4] = (abs_l-d_rear) * TMath::Tan(acc_min);
172	gMC->Gsvolu("AWIN", "CONE", idtmed[1651], cpar, 5);
173	//
174	dz = (abs_l-abs_d)/2.-cpar[0]-d_rear;
175	gMC->Gspos("AWIN", 1, "ABSS", 0., 0., dz, 0, "ONLY");
176
177	// Inner tracking region
178	//
179	// mother volume: Pb
180	//
181	pcpar[0] = 0.;
182	pcpar[1] = 360.;
183	pcpar[2] = 3.;
184	pcpar[3] = -(abs_l-abs_d)/2.;
185	pcpar[4] = r_abs;
186	pcpar[5] = abs_d * TMath::Tan(acc_max);
187	pcpar[6] = pcpar[3]+(z_2deg-abs_d);
188	pcpar[7] = r_abs;
189	pcpar[8] = z_2deg * TMath::Tan(acc_max);
190	pcpar[9] = -par[3];
191	pcpar[10] = abs_l * TMath::Tan(acc_min);
192	pcpar[11] = abs_l * TMath::Tan(acc_max);
193	gMC->Gsvolu("AITR", "PCON", idtmed[1612], pcpar, 12);
194	//
195	// special Pb medium for last 5 cm of Pb
196	zr=abs_l-5;
197	cpar[0] = 2.5;
198	cpar[1] = zr * TMath::Tan(theta_r);
199	cpar[2] = zr * TMath::Tan(acc_max);
200	cpar[3] = cpar[1] + TMath::Tan(acc_min) * 5;
201	cpar[4] = cpar[2] + TMath::Tan(theta_r) * 5;
202	gMC->Gsvolu("ARPB", "CONE", idtmed[1632], cpar, 5);
203	dz=(abs_l-abs_d)/2.-cpar[0];
204	gMC->Gspos("ARPB", 1, "AITR", 0., 0., dz, 0, "ONLY");
205
206	//
207	// concrete cone: concrete
208	//
209	pcpar[9] = par[3]+(abs_l-d_rear-abs_d);
210	pcpar[10] = (abs_l-d_rear) * TMath::Tan(acc_min);
211	pcpar[11] = (abs_l-d_rear) * TMath::Tan(acc_max);
212	gMC->Gsvolu("ACON", "PCON", idtmed[1616], pcpar, 12);
213	gMC->Gspos("ACON", 1, "AITR", 0., 0., 0., 0, "ONLY");
214	//
215	// carbon cone: carbon
216	//
217	pcpar[9] = pcpar[3]+(abs_cc-abs_d);
218	pcpar[10] = abs_cc * TMath::Tan(acc_min);
219	pcpar[11] = abs_cc * TMath::Tan(acc_max);
220	gMC->Gsvolu("ACAR", "PCON", idtmed[1605], pcpar, 12);
221	gMC->Gspos("ACAR", 1, "ACON", 0., 0., 0., 0, "ONLY");
222	//
223	// inner W shield
224	zr=abs_l-d_rear;
225	cpar[0] = d_rear/2.;
226	cpar[1] = zr * TMath::Tan(acc_min);
227	cpar[2] = zr * TMath::Tan(theta_r);
228	cpar[3] = cpar[1] + TMath::Tan(acc_min) * 35;
229	cpar[4] = cpar[2] + TMath::Tan(theta_r) * 35;
230	gMC->Gsvolu("ARW0", "CONE", idtmed[1611], cpar, 5);
231	dz=(abs_l-abs_d)/2.-cpar[0];
232	gMC->Gspos("ARW0", 1, "AITR", 0., 0., dz, 0, "ONLY");
233	//
234	// special W medium for last 5 cm of W
235	zr=abs_l-5;
236	cpar[0] = 2.5;
237	cpar[1] = zr * TMath::Tan(acc_min);
238	cpar[2] = zr * TMath::Tan(theta_r);
239	cpar[3] = cpar[1] + TMath::Tan(acc_min) * 5.;
240	cpar[4] = cpar[2] + TMath::Tan(theta_r) * 5.;
241	gMC->Gsvolu("ARW1", "CONE", idtmed[1631], cpar, 5);
242	dz=d_rear/2.-cpar[0];
243	gMC->Gspos("ARW1", 1, "ARW0", 0., 0., dz, 0, "ONLY");
244	//
245	// PolyEthylene Layers
246	Float_t dr_min=TMath::Tan(theta_r) * 5;
247	Float_t dr_max=TMath::Tan(acc_max) * 5;
248	gMC->Gsvolu("ARPE", "CONE", idtmed[1617], cpar, 0);
249	cpar[0]=2.5;
250	for (Int_t i=0; i<3; i++) {
251	zr=abs_l-d_rear+5+i*10.;
252	cpar[1] = zr * TMath::Tan(theta_r);
253	cpar[2] = zr * TMath::Tan(acc_max);
254	cpar[3] = cpar[1] + dr_min;
255	cpar[4] = cpar[2] + dr_max;
256	dz=(abs_l-abs_d)/2.-cpar[0]-5.-(2-i)*10;
257	gMC->Gsposp("ARPE", i+1, "AITR", 0., 0., dz, 0, "ONLY",cpar,5);
258	}
259	gMC->Gspos("AITR", 1, "ABSS", 0., 0., 0., 0, "ONLY");
260	dz = (abs_l-abs_d)/2.+abs_d;
261	gMC->Gspos("ABSM", 1, "ALIC", 0., 0., dz, 0, "ONLY");
262	//
263	//
264	// vacuum system
265	//
266	// pipe and heating jackets
267	//
268	//
269	// cylindrical piece
270	tpar0[2]=(abs_c-abs_d)/2;
271	tpar0[0]=r_vacu;
272	tpar0[1]=r_abs;
273	gMC->Gsvolu("AV11", "TUBE", idtmed[1658], tpar0, 3);
274	//
275	// insulation
276	tpar[2]=tpar0[2];
277	tpar[0]=tpar0[0]+d_tube;
278	tpar[1]=tpar0[0]+d_tube+d_insu;
279	gMC->Gsvolu("AI11", "TUBE", idtmed[1653], tpar, 3);
280	gMC->Gspos("AI11", 1, "AV11", 0., 0., 0., 0, "ONLY");
281	//
282	// clearance
283	tpar[0]=tpar0[1]-d_prot-d_free;
284	tpar[1]=tpar0[1]-d_prot;
285	gMC->Gsvolu("AP11", "TUBE", idtmed[1655], tpar, 3);
286	gMC->Gspos("AP11", 1, "AV11", 0., 0., 0., 0, "ONLY");
287
288	dz=-(abs_l-abs_d)/2.+tpar0[2];
289	gMC->Gspos("AV11", 1, "ABSM", 0., 0., dz, 0, "ONLY");
290
291	//
292	// conical piece
293	cpar0[0]=(abs_l-d_rear-abs_c)/2;
294	cpar0[1]=r_vacu;
295	cpar0[2]=r_abs;
296	cpar0[3]=cpar0[1]+2.cpar0[0]TMath::Tan(theta_open1);
297	cpar0[4]=cpar0[2]+2.cpar0[0]TMath::Tan(theta_open1);
298	gMC->Gsvolu("AV21", "CONE", idtmed[1658], cpar0, 5);
299	//
300	// insulation
301	cpar[0]=cpar0[0];
302	cpar[1]=cpar0[1]+d_tube;
303	cpar[2]=cpar0[1]+d_tube+d_insu;
304	cpar[3]=cpar0[3]+d_tube;
305	cpar[4]=cpar0[3]+d_tube+d_insu;
306	gMC->Gsvolu("AI21", "CONE", idtmed[1653], cpar, 5);
307	gMC->Gspos("AI21", 1, "AV21", 0., 0., 0., 0, "ONLY");
308	//
309	// clearance
310	cpar[1]=cpar0[2]-d_prot-d_free;
311	cpar[2]=cpar0[2]-d_prot;
312	cpar[3]=cpar0[4]-d_prot-d_free;
313	cpar[4]=cpar0[4]-d_prot;
314	gMC->Gsvolu("AP21", "CONE", idtmed[1655], cpar, 5);
315	gMC->Gspos("AP21", 1, "AV21", 0., 0., 0., 0, "ONLY");
316
317	dz=(abs_l-abs_d)/2.-cpar0[0]-d_rear;
318	gMC->Gspos("AV21", 1, "ABSM", 0., 0., dz, 0, "ONLY");
319
320	}
321
322	//_____________________________________________________________________________
323
324	void AliABSOv0::Init()
325	{
326	//
327	// Initialisation of the muon absorber after it has been built
328	Int_t i;
329	//
330	printf("\n");
331	for(i=0;i<35;i++) printf("*");
332	printf(" ABSOv0_INIT ");
333	for(i=0;i<35;i++) printf("*");
334	printf("\n");
335	//
336	for(i=0;i<80;i++) printf("*");
337	printf("\n");
338	}
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