START/AliSTARTv0.cxx

   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 Revision 1.13  2001/09/19 18:41:59  alla
  19 Asimmetric START geometry
  20
  21 Revision 1.12  2001/04/25 14:09:34  alla
  22 Curent bur fixed
  23
  24 Revision 1.11  2001/04/04 12:10:18  alla
  25 changes according Coding Convension
  26
  27 Revision 1.10  2000/12/04 08:48:19  alibrary
  28 Fixing problems in the HEAD
  29
  30 Revision 1.9  2000/10/02 21:28:13  fca
  31 Removal of useless dependecies via forward declarations
  32
  33 Revision 1.8  2000/07/13 16:41:29  fca
  34 New START corrected for coding conventions
  35
  36 Revision 1.7  2000/01/21 15:45:23  fca
  37 New Version from Alla
  38
  39 Revision 1.6  1999/11/12 15:04:00  fca
  40 Modifications from A.Maevskaya
  41
  42 Revision 1.5  1999/09/29 09:24:29  fca
  43 Introduction of the Copyright and cvs Log
  44
  45 */
  46
  47 /////////////////////////////////////////////////////////////////////
  48 //                                                                 //
  49 // START ( T-zero) detector  version 0                        //
  50 //
  51 //Begin Html
  52 /*
  53 <img src="gif/AliSTARTv0Class.gif">
  54 */
  55 //End Html
  56 //                                                                  //
  57 //                                                                  //
  58 //////////////////////////////////////////////////////////////////////
  59
  60 #include <TMath.h>
  61 #include <TGeometry.h>
  62 #include <TTUBE.h>
  63 #include <TNode.h>
  64 #include <TLorentzVector.h>
  65
  66 #include "AliSTARTv0.h"
  67 #include "AliRun.h"
  68 #include "AliMC.h"
  69 #include "AliMagF.h"
  70 #include "AliSTARThit.h"
  71
  72 #include <iostream.h>
  73 #include <fstream.h>
  74
  75 //#include "TGeant3.h"
  76 #include <stdlib.h>
  77
  78 ClassImp(AliSTARTv0)
  79
  80 //--------------------------------------------------------------------
  81 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
  82  AliSTART(name,title)
  83 {
  84   //
  85   // Standart constructor for START Detector version 0
  86   //
  87   fIdSens1=0;
  88 //  setBufferSize(128000);
  89 }
  90 //-------------------------------------------------------------------------
  91 void AliSTARTv0::CreateGeometry()
  92 {
  93   //
  94   // Create the geometry of START Detector version 0
  95   //
  96   // begin Html
  97   /*
  98    <img src="gif/AliSTARTv0.gif">
  99   */
 100   //
 101
 102
 103   Int_t *idtmed = fIdtmed->GetArray();
 104
 105   Int_t is;
 106   Int_t idrotm[999];
 107   Float_t x,y,z;
 108
 109   Float_t pstart[3]={4.5,10.7,5.3};
 110   Float_t pinstart[3]={0.,1.3,5.25};
 111   Float_t ppmt[3]={0.,1.3,3.5};
 112   Float_t pdivider[3]={0.,1.2,1.75};
 113   Float_t pdiv2[3]={0.,1.2,1.25};
 114   Float_t pdiv1[3]={0.6,1.2,0.5};
 115   Float_t ptop[3]={0.,1.3,1.5};
 116   Float_t pbot[3]={0.6,1.2,0.1};
 117   Float_t pglass[3]={1.2,1.3,2.};
 118   Float_t pcer[3]={0.9,1.1,0.09};
 119   Float_t psteel[3]={0.9,1.1,0.01};
 120   Float_t ppins[3]={0.6,1.2,0.014};
 121   Float_t phole[3]={0.6,1.2,0.015};
 122   Float_t pknob[3]={0.5,0.6,0.4};
 123   Float_t pknob_vac[3]={0.,0.5,0.4};
 124   Float_t pknob_bot[3]={0.,0.6,0.05};
 125   Float_t pribber[3] = {0.,1.2,2.413/2.};
 126   Float_t presist[3] = {0.,1.2,0.087/2.};
 127
 128   Float_t zdetRight=69.7,zdetLeft=350;
 129  //-------------------------------------------------------------------
 130  //  START volume
 131  //-------------------------------------------------------------------
 132
 133   //  Float_t theta=TMath::ATan(6.5/zdet);
 134   Float_t thetaRight=(180./3.1415)*TMath::ATan(6.5/zdetRight);
 135   Float_t thetaLeft=(180./3.1415)*TMath::ATan(6.5/zdetLeft);
 136     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 137
 138     gMC->Gsvolu("0STR","TUBE",idtmed[1],pstart,3);
 139     gMC->Gsvolu("0STL","TUBE",idtmed[1],pstart,3);
 140     gMC->Gspos("0STR",1,"ALIC",0.,0.,zdetRight+pstart[2],0,"ONLY");
 141     gMC->Gspos("0STL",1,"ALIC",0.,0.,-zdetLeft-pstart[2],idrotm[901],"ONLY");
 142
 143 //START interior
 144     gMC->Gsvolu("0INS","TUBE",idtmed[1],pinstart,3);
 145     gMC->Gsvolu("0PMT","TUBE",idtmed[3],ppmt,3);
 146     gMC->Gsvolu("0DIV","TUBE",idtmed[3],pdivider,3);
 147
 148 // first ring: 12 units of Scintillator+PMT+divider
 149     Double_t dang1 = 2*TMath::Pi()/12;
 150     for (is=1; is<=12; is++)
 151       {
 152         AliMatrix(idrotm[901+is],
 153                   90.-thetaRight, 30.*is,
 154                   90.,       90.+30.*is,
 155                   thetaRight,    180.+30.*is);
 156         x=6.5*TMath::Sin(is*dang1);
 157         y=6.5*TMath::Cos(is*dang1);
 158         z=-pstart[2]+pinstart[2];
 159         gMC->Gspos("0INS",is,"0STR",x,y,z,idrotm[901+is],"ONLY");
 160
 161       }
 162     for (is=1; is<=12; is++)
 163       {
 164         AliMatrix(idrotm[901+is],
 165                   90.-thetaLeft, 30.*is,
 166                   90.,       90.+30.*is,
 167                   thetaLeft,    180.+30.*is);
 168
 169         x=6.5*TMath::Sin(is*dang1);
 170         y=6.5*TMath::Cos(is*dang1);
 171         z=-pstart[2]+pinstart[2];
 172         gMC->Gspos("0INS",is,"0STL",x,y,z,idrotm[901+is],"ONLY");
 173
 174       }
 175      x=0;
 176     y=0;
 177     z=-pinstart[2]+ppmt[2];
 178     if(fDebug) printf("%s: is %d, z Divider %f\n",ClassName(),is,z);
 179     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 180     z=pinstart[2]-pdivider[2];
 181     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 182
 183      /*
 184 //second ring: 20 units of Scintillator+PMT+divider
 185       Double_t dang2 = 2*TMath::Pi()/26;
 186       Double_t dang3 = 2*TMath::Pi()/20;
 187        for (is=14; is<=33;is++)
 188      {
 189      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
 190      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
 191       z=-pstart[2]+ppmt[2];
 192       gMC->Gspos("0PMT",is,"0STA",x,y,z,0,"ONLY");
 193       z=z+ppmt[2]+pdiv2[2];
 194       gMC->Gspos("0DIV",is,"0STA",x,y,z,0,"ONLY");
 195       }
 196      */
 197 // PMT
 198
 199     // Entry window (glass)
 200     // gMC->Gsvolu("0TOP","TUBE",idtmed[6],ptop,3);
 201        gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 202      z=-ppmt[2]+ptop[2];
 203     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 204     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 205
 206     // Bottom glass
 207     gMC->Gsvolu("0BOT","TUBE",idtmed[6],pbot,3);
 208     z=ppmt[2]-pbot[2];
 209     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
 210     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 211     // Side cylinder glass
 212     gMC->Gsvolu("0OUT","TUBE",idtmed[6],pglass,3);
 213     z=ppmt[2]-pglass[2];
 214     //      printf("Z glass %f\n",z);
 215     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 216     //PMT electrodes support structure
 217     gMC->Gsvolu("0CER","TUBE",idtmed[4],pcer,3);
 218     gMC->Gsvolu("0STE","TUBE",idtmed[8],psteel,3);
 219     z=-ppmt[2]+2*ptop[2]+0.3;;
 220     //      printf("Z Cer 1 %f\n",z);
 221     for (is=1; is<=15; is++)
 222       {
 223         z=z+psteel[2]+pcer[2];
 224         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 225         z=z+psteel[2]+pcer[2];
 226         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 227       }
 228
 229     // Divider
 230     // Knob at the bottom of PMT baloon
 231
 232     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 233     z=-pdivider[2]+pknob[2];
 234     //      printf("zknob %f\n",z);
 235     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 236     gMC->Gsvolu("0KB","TUBE",idtmed[6],pknob_bot,3);
 237     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 238     //      printf(knobbot %f\n",z);
 239     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 240     gMC->Gsvolu("0VAC","TUBE",idtmed[3],pknob_vac,3);
 241     z=-pdivider[2]+pknob_vac[2];
 242     //      printf("knobvac %f\n",z);
 243     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 244     //Steel pins + pin holes
 245     gMC->Gsvolu("0PIN","TUBE",idtmed[8],ppins,3);
 246     z=-pdivider[2]+ppins[2];
 247     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 248     gMC->Gsvolu("0HOL","TUBE",idtmed[11],phole,3);
 249     z=-pdivider[2]+2*ppins[2]+phole[2];
 250     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 251
 252     //Socket
 253     gMC->Gsvolu("0V1","TUBE",idtmed[4],pdiv1,3);
 254     z=-pdivider[2]+pdiv1[2];
 255     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 256     //Resistors
 257     gMC->Gsvolu("0V2","TUBE",idtmed[1],pdiv2,3);
 258     z=pdivider[2]-pdiv2[2];
 259     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 260     gMC->Gsvolu("0RS","TUBE",idtmed[4],presist,3);
 261     z=-pdiv2[2]+presist[2];
 262     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 263     gMC->Gsvolu("0RB","TUBE",idtmed[9],pribber,3);
 264     z=pdiv2[2]-pribber[2];
 265     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 266     //      printf("z DRIB %f\n",z);
 267
 268
 269 }
 270
 271
 272
 273
 274 //------------------------------------------------------------------------
 275 void AliSTARTv0::CreateMaterials()
 276 {
 277    Int_t isxfld   = gAlice->Field()->Integ();
 278    Float_t sxmgmx = gAlice->Field()->Max();
 279    Float_t a,z,d,radl,absl,buf[1];
 280    Int_t nbuf;
 281
 282 // Scintillator CH
 283    Float_t ascin[2]={1.01,12.01};
 284    Float_t zscin[2]={1,6};
 285    Float_t wscin[2]={1,1};
 286    Float_t denscin=1.03;
 287 // PMT glass SiO2
 288    Float_t aglass[2]={28.0855,15.9994};
 289    Float_t zglass[2]={14.,8.};
 290    Float_t wglass[2]={1.,2.};
 291    Float_t dglass=2.65;
 292 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 293    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 294    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 295    Float_t zal2o3[2]  = { 13.,8. };
 296    Float_t wal2o3[2]  = { 2.,3. };
 297    Float_t denscer  = 3.6;
 298
 299 // Brass 80% Cu, 20% Zn
 300    Float_t abrass[2] = {63.546,65.39};
 301    Float_t zbrass[2] = {29,30};
 302    Float_t wbrass[2] = {0.8,0.2};
 303    Float_t denbrass=8.96;
 304
 305 //Ribber C6H12S
 306    Float_t aribber[3] = {12.,1.,32.};
 307    Float_t zribber[3] = {6.,1.,16.};
 308    Float_t wribber[3] = {6.,12.,1.};
 309    Float_t denribber=0.8;
 310    /*
 311 // Definition Cherenkov parameters
 312    Float_t ppckov[14] = { 5.63e-9,5.77e-9,5.9e-9,6.05e-9,6.2e-9,6.36e-9,6.52e-9,6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
 313    Float_t rindex_quarz[14] = { 1.528309,1.533333,
 314                                 1.538243,1.544223,1.550568,1.55777,
 315                                 1.565463,1.574765,1.584831,1.597027,
 316                                 1.611858,1.6277,1.6472,1.6724 };
 317
 318    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
 319                                 6.324,4.483,1.6,.323,.073,0. };
 320    */
 321    //   Int_t *idtmed = fIdtmed->GetArray()-999;
 322
 323    //  TGeant3 *geant3 = (TGeant3*) gMC;
 324
 325 //*** Definition Of avaible START materials ***
 326    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 327    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 328    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 329
 330    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 331    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 332    char namate[21];
 333    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 334    acer[0]=a;
 335    zcer[0]=z;
 336    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 337    acer[1]=a;
 338    zcer[1]=z;
 339
 340    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 341    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 342    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 343
 344    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 345
 346
 347    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 348    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 349    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 350    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 351    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 352    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 353    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 354    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 355    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 356
 357 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 358
 359 }
 360 //---------------------------------------------------------------------
 361 void AliSTARTv0::DrawModule()
 362 {
 363 //
 364 // Draw a shaded view of the Forward multiplicity detector version 0
 365 //
 366
 367   //Set ALIC mother transparent
 368   gMC->Gsatt("ALIC","SEEN",0);
 369   //
 370   //Set volumes visible
 371   gMC->Gsatt("0STA","SEEN",0);
 372   gMC->Gsatt("0PMT","SEEN",1);
 373   gMC->Gsatt("0DIV","SEEN",1);
 374   //
 375   gMC->Gdopt("hide","on");
 376   gMC->Gdopt("shad","on");
 377   gMC->SetClipBox(".");
 378   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 379   gMC->DefaultRange();
 380   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
 381   gMC->Gdhead(1111,"T-Zero detector");
 382   gMC->Gdopt("hide","off");
 383 }
 384
 385 //-------------------------------------------------------------------
 386 void AliSTARTv0::Init()
 387 {
 388 // Initialises version 0 of the Forward Multiplicity Detector
 389 //
 390 //Int_t *idtmed  = gAlice->Idtmed();
 391   AliSTART::Init();
 392   fIdSens1=gMC->VolId("0TOP");
 393   printf("*** START version 0 initialized ***\n");
 394
 395 }
 396
 397 //-------------------------------------------------------------------
 398
 399 void AliSTARTv0::StepManager()
 400 {
 401   //
 402   // Called for every step in the START Detector
 403   // See AliSTARTv1
 404
 405 }
 406 //---------------------------------------------------------------------
 407
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