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