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 1.9  2000/10/02 21:28:13  fca
  19 Removal of useless dependecies via forward declarations
  20
  21 Revision 1.8  2000/07/13 16:41:29  fca
  22 New START corrected for coding conventions
  23
  24 Revision 1.7  2000/01/21 15:45:23  fca
  25 New Version from Alla
  26
  27 Revision 1.6  1999/11/12 15:04:00  fca
  28 Modifications from A.Maevskaya
  29
  30 Revision 1.5  1999/09/29 09:24:29  fca
  31 Introduction of the Copyright and cvs Log
  32
  33 */
  34
  35 /////////////////////////////////////////////////////////////////////
  36 //                                                                 //
  37 // START ( T-zero) detector  version 0                        //
  38 //
  39 //Begin Html
  40 /*
  41 <img src="gif/AliSTARTv0Class.gif">
  42 */
  43 //End Html
  44 //                                                                  //
  45 //                                                                  //
  46 //////////////////////////////////////////////////////////////////////
  47
  48 #include <TMath.h>
  49 #include <TGeometry.h>
  50 #include <TTUBE.h>
  51 #include <TNode.h>
  52 #include <TLorentzVector.h>
  53
  54 #include "AliSTARTv0.h"
  55 #include "AliRun.h"
  56 #include "AliMC.h"
  57 #include "AliMagF.h"
  58 #include "AliSTARThit.h"
  59
  60 #include <iostream.h>
  61 #include <fstream.h>
  62
  63 //#include "TGeant3.h"
  64 #include <stdlib.h>
  65
  66 ClassImp(AliSTARTv0)
  67
  68 //--------------------------------------------------------------------
  69 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
  70  AliSTART(name,title)
  71 {
  72   //
  73   // Standart constructor for START Detector version 0
  74   //
  75   fIdSens1=0;
  76 //  setBufferSize(128000);
  77 }
  78 //-------------------------------------------------------------------------
  79 void AliSTARTv0::CreateGeometry()
  80 {
  81   //
  82   // Create the geometry of START Detector version 0
  83   //
  84   // begin Html
  85   /*
  86    <img src="gif/AliSTARTv0.gif">
  87   */
  88   //
  89
  90
  91   Int_t *idtmed = fIdtmed->GetArray();
  92
  93   Int_t is;
  94   Int_t idrotm[999];
  95   Float_t x,y,z;
  96
  97   Float_t pstart[3]={4.5,10.7,5.3};
  98   Float_t ppmt[3]={0.,1.3,3.5};
  99   Float_t pdivider[3]={0.,1.2,1.75};
 100   Float_t pdiv2[3]={0.,1.2,1.25};
 101   Float_t pdiv1[3]={0.6,1.2,0.5};
 102   Float_t ptop[3]={0.,1.3,1.5};
 103   Float_t pbot[3]={0.6,1.2,0.1};
 104   Float_t pglass[3]={1.2,1.3,2.};
 105   Float_t pcer[3]={0.9,1.1,0.09};
 106   Float_t psteel[3]={0.9,1.1,0.01};
 107   Float_t ppins[3]={0.6,1.2,0.014};
 108   Float_t phole[3]={0.6,1.2,0.015};
 109   Float_t pknob[3]={0.5,0.6,0.4};
 110   Float_t pknob_vac[3]={0.,0.5,0.4};
 111   Float_t pknob_bot[3]={0.,0.6,0.05};
 112   Float_t pribber[3] = {0.,1.2,2.413/2.};
 113   Float_t presist[3] = {0.,1.2,0.087/2.};
 114
 115   Float_t zdet=75.;
 116  //-------------------------------------------------------------------
 117  //  START volume
 118  //-------------------------------------------------------------------
 119
 120     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 121     gMC->Gsvolu("STRT","TUBE",idtmed[1],pstart,3);
 122     gMC->Gspos("STRT",1,"ALIC",0.,0.,zdet,0,"ONLY");
 123     gMC->Gspos("STRT",2,"ALIC",0.,0.,-zdet,idrotm[901],"ONLY");
 124
 125 //START interior
 126     gMC->Gsvolu("PMT ","TUBE",idtmed[3],ppmt,3);
 127     gMC->Gsvolu("DIVI","TUBE",idtmed[3],pdivider,3);
 128
 129 // first ring: 12 units of Scintillator+PMT+divider
 130     Double_t dang1 = 2*TMath::Pi()/12;
 131     for (is=1; is<=12; is++)
 132       {
 133         x=6.5*TMath::Sin(is*dang1);
 134         y=6.5*TMath::Cos(is*dang1);
 135         z=-pstart[2]+ppmt[2];
 136         gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 137         printf("z PMT %f\n",z);
 138         z=z+ppmt[2]+pdiv2[2];
 139         printf(" is %d, z Divider %f\n",is,z);
 140         gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 141       }
 142      /*
 143 //second ring: 20 units of Scintillator+PMT+divider
 144       Double_t dang2 = 2*TMath::Pi()/26;
 145       Double_t dang3 = 2*TMath::Pi()/20;
 146        for (is=14; is<=33;is++)
 147      {
 148      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
 149      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
 150       z=-pstart[2]+ppmt[2];
 151       gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 152       z=z+ppmt[2]+pdiv2[2];
 153       gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 154       }
 155      */
 156 // PMT
 157
 158     // Entry window (glass)
 159     gMC->Gsvolu("PTOP","TUBE",idtmed[6],ptop,3);
 160     z=-ppmt[2]+ptop[2];
 161     gMC->Gspos("PTOP",1,"PMT ",0,0,z,0,"ONLY");
 162     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 163     // Bottom glass
 164     gMC->Gsvolu("PBOT","TUBE",idtmed[6],pbot,3);
 165     z=ppmt[2]-pbot[2];
 166     printf("Z bottom %f\n",z);
 167     gMC->Gspos("PBOT",1,"PMT ",0,0,z,0,"ONLY");
 168     // Side cylinder glass
 169     gMC->Gsvolu("POUT","TUBE",idtmed[6],pglass,3);
 170     z=ppmt[2]-pglass[2];
 171     //      printf("Z glass %f\n",z);
 172     gMC->Gspos("POUT",1,"PMT ",0,0,z,0,"ONLY");
 173     //PMT electrodes support structure
 174     gMC->Gsvolu("PCER","TUBE",idtmed[4],pcer,3);
 175     gMC->Gsvolu("PSTE","TUBE",idtmed[8],psteel,3);
 176     z=-ppmt[2]+2*ptop[2]+0.3;;
 177     //      printf("Z Cer 1 %f\n",z);
 178     for (is=1; is<=15; is++)
 179       {
 180         z=z+psteel[2]+pcer[2];
 181         gMC->Gspos("PCER",is,"PMT",0,0,z,0,"ONLY");
 182         z=z+psteel[2]+pcer[2];
 183         gMC->Gspos("PSTE",is,"PMT",0,0,z,0,"ONLY");
 184       }
 185
 186     // Divider
 187     // Knob at the bottom of PMT baloon
 188
 189     gMC->Gsvolu("KNOB","TUBE",idtmed[6],pknob,3);
 190     z=-pdivider[2]+pknob[2];
 191     //      printf("zknob %f\n",z);
 192     gMC->Gspos("KNOB",1,"DIVI",0,0,z,0,"ONLY");
 193     gMC->Gsvolu("KNBO","TUBE",idtmed[6],pknob_bot,3);
 194     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 195     //      printf("knobbot %f\n",z);
 196     gMC->Gspos("KNBO",1,"DIVI ",0,0,z,0,"ONLY");
 197     gMC->Gsvolu("KNVA","TUBE",idtmed[6],pknob_vac,3);
 198     z=-pdivider[2]+pknob_vac[2];
 199     //      printf("knobvac %f\n",z);
 200     gMC->Gspos("KNVA",1,"DIVI",0,0,z,0,"ONLY");
 201     //Steel pins + pin holes
 202     gMC->Gsvolu("PINS","TUBE",idtmed[8],ppins,3);
 203     z=-pdivider[2]+ppins[2];
 204     gMC->Gspos("PINS",1,"DIVI",0,0,z,0,"ONLY");
 205     gMC->Gsvolu("HOLE","TUBE",idtmed[11],phole,3);
 206     z=-pdivider[2]+2*ppins[2]+phole[2];
 207     gMC->Gspos("HOLE",1,"DIVI",0,0,z,0,"ONLY");
 208
 209     //Socket
 210     gMC->Gsvolu("DIV1","TUBE",idtmed[4],pdiv1,3);
 211     z=-pdivider[2]+pdiv1[2];
 212     gMC->Gspos("DIV1",1,"DIVI",0,0,z,0,"ONLY");
 213     //Resistors
 214     gMC->Gsvolu("DIV2","TUBE",idtmed[1],pdiv2,3);
 215     z=pdivider[2]-pdiv2[2];
 216     gMC->Gspos("DIV2",1,"DIVI",0,0,z,0,"ONLY");
 217     gMC->Gsvolu("DRES","TUBE",idtmed[4],presist,3);
 218     z=-pdiv2[2]+presist[2];
 219     gMC->Gspos("DRES",1,"DIV2",0,0,z,0,"ONLY");
 220     gMC->Gsvolu("DRIB","TUBE",idtmed[9],pribber,3);
 221     z=pdiv2[2]-pribber[2];
 222     gMC->Gspos("DRIB",1,"DIV2",0,0,z,0,"ONLY");
 223     //      printf("z DRIB %f\n",z);
 224
 225
 226 }
 227 //------------------------------------------------------------------------
 228 void AliSTARTv0::CreateMaterials()
 229 {
 230    Int_t isxfld   = gAlice->Field()->Integ();
 231    Float_t sxmgmx = gAlice->Field()->Max();
 232    Float_t a,z,d,radl,absl,buf[1];
 233    Int_t nbuf;
 234
 235 // Scintillator CH
 236    Float_t ascin[2]={1.01,12.01};
 237    Float_t zscin[2]={1,6};
 238    Float_t wscin[2]={1,1};
 239    Float_t denscin=1.03;
 240 // PMT glass SiO2
 241    Float_t aglass[2]={28.0855,15.9994};
 242    Float_t zglass[2]={14.,8.};
 243    Float_t wglass[2]={1.,2.};
 244    Float_t dglass=2.65;
 245 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 246    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 247    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 248    Float_t zal2o3[2]  = { 13.,8. };
 249    Float_t wal2o3[2]  = { 2.,3. };
 250    Float_t denscer  = 3.6;
 251
 252 // Brass 80% Cu, 20% Zn
 253    Float_t abrass[2] = {63.546,65.39};
 254    Float_t zbrass[2] = {29,30};
 255    Float_t wbrass[2] = {0.8,0.2};
 256    Float_t denbrass=8.96;
 257
 258 //Ribber C6H12S
 259    Float_t aribber[3] = {12.,1.,32.};
 260    Float_t zribber[3] = {6.,1.,16.};
 261    Float_t wribber[3] = {6.,12.,1.};
 262    Float_t denribber=0.8;
 263    /*
 264 // Definition Cherenkov parameters
 265    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 };
 266    Float_t rindex_quarz[14] = { 1.528309,1.533333,
 267                                 1.538243,1.544223,1.550568,1.55777,
 268                                 1.565463,1.574765,1.584831,1.597027,
 269                                 1.611858,1.6277,1.6472,1.6724 };
 270
 271    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
 272                                 6.324,4.483,1.6,.323,.073,0. };
 273    */
 274    //   Int_t *idtmed = fIdtmed->GetArray()-999;
 275
 276    //  TGeant3 *geant3 = (TGeant3*) gMC;
 277
 278 //*** Definition Of avaible START materials ***
 279    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 280    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 281    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 282
 283    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 284    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 285    char namate[21];
 286    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 287    acer[0]=a;
 288    zcer[0]=z;
 289    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 290    acer[1]=a;
 291    zcer[1]=z;
 292
 293    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 294    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 295    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 296
 297    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 298
 299
 300    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 301    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 302    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 303    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 304    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 305    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 306    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 307    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 308
 309 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 310
 311 }
 312 //---------------------------------------------------------------------
 313 void AliSTARTv0::DrawModule()
 314 {
 315 //
 316 // Draw a shaded view of the Forward multiplicity detector version 0
 317 //
 318
 319   //Set ALIC mother transparent
 320   gMC->Gsatt("ALIC","SEEN",0);
 321   //
 322   //Set volumes visible
 323   gMC->Gsatt("STRT","SEEN",0);
 324   gMC->Gsatt("PMT ","SEEN",1);
 325   gMC->Gsatt("DIVI","SEEN",1);
 326   //
 327   gMC->Gdopt("hide","on");
 328   gMC->Gdopt("shad","on");
 329   gMC->SetClipBox(".");
 330   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 331   gMC->DefaultRange();
 332   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
 333   gMC->Gdhead(1111,"T-Zero detector");
 334   gMC->Gdopt("hide","off");
 335 }
 336
 337 //-------------------------------------------------------------------
 338 void AliSTARTv0::Init()
 339 {
 340 // Initialises version 0 of the Forward Multiplicity Detector
 341 //
 342 //Int_t *idtmed  = gAlice->Idtmed();
 343   AliSTART::Init();
 344   fIdSens1=gMC->VolId("PTOP");
 345   printf("*** START version 0 initialized ***\n");
 346
 347 }
 348
 349 //-------------------------------------------------------------------
 350
 351 void AliSTARTv0::StepManager()
 352 {
 353   //
 354   // Called for every step in the START Detector
 355   //
 356   Int_t id,copy,copy1;
 357   static Float_t hits[7];
 358   static Float_t edep;
 359   static Int_t vol[2];
 360   TLorentzVector pos;
 361
 362   TClonesArray &lhits = *fHits;
 363
 364   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 365   Float_t charge = gMC->TrackCharge();
 366   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 367   //    gMC->Gpcxyz();
 368   id=gMC->CurrentVolID(copy);
 369
 370
 371   //  printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
 372   // Check the sensetive volume
 373   if(id==fIdSens1 ) {
 374     if(gMC->IsTrackEntering()) {
 375       gMC->CurrentVolOffID(2,copy);
 376       vol[0]=copy;
 377       gMC->CurrentVolOffID(1,copy1);
 378       vol[1]=copy1;
 379       gMC->TrackPosition(pos);
 380       hits[0] = pos[0];
 381       hits[1] = pos[1];
 382       hits[2] = pos[2];
 383       Float_t etot=gMC->Etot();
 384       hits[4]=etot;
 385       Int_t part= gMC->TrackPid();
 386       hits[5]=part;
 387       Float_t ttime=gMC->TrackTime();
 388       hits[6]=ttime*1e9;
 389       edep=0;
 390     }
 391     if(gMC->IsTrackInside())    {
 392       Float_t de=gMC->Edep();
 393       edep=edep+de;
 394       //       printf ("E deposition %f\n",edep);
 395       //    for (i=0; i<=6; i++){
 396       //    printf(" HITS on START inside %f\n",hits[i]); }
 397     }
 398     if(gMC->IsTrackExiting())   {
 399       Float_t de=gMC->Edep();
 400       edep=edep+de;
 401       hits[3]=edep*1e3;
 402
 403       //       for (i=0; i<=6; i++){
 404       //         printf(" HITS on START Exit %f\n",hits[i]); }
 405       //for (i=0; i<=1; i++) { printf("START vol %d\n",vol[i]);}
 406
 407       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 408     }
 409   }
 410 //---------------------------------------------------------------------
 411 }
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