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 */
  19
  20 /////////////////////////////////////////////////////////////////////
  21 //                                                                 //
  22 // START ( T-zero) detector  version 0                        //
  23 //
  24 //Begin Html
  25 /*
  26 <img src="gif/AliSTARTv0Class.gif">
  27 */
  28 //End Html
  29 //                                                                  //
  30 //                                                                  //
  31 //////////////////////////////////////////////////////////////////////
  32
  33 #include <TMath.h>
  34 #include <TGeometry.h>
  35 #include <TTUBE.h>
  36 #include <TNode.h>
  37
  38 #include "AliSTARTv0.h"
  39 #include "AliRun.h"
  40 #include "AliMC.h"
  41
  42 #include <iostream.h>
  43 #include <fstream.h>
  44
  45 //#include "TGeant3.h"
  46 #include <stdlib.h>
  47
  48 ClassImp(AliSTARTv0)
  49
  50 //--------------------------------------------------------------------
  51 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
  52  AliSTART(name,title)
  53 {
  54   //
  55   // Standart constructor for START Detector version 0
  56   //
  57   fIdSens1=0;
  58 //  setBufferSize(128000);
  59 }
  60 //-------------------------------------------------------------------------
  61 void AliSTARTv0::CreateGeometry()
  62 {
  63   //
  64   // Create the geometry of START Detector version 0
  65   //
  66   // begin Html
  67   /*
  68    <img src="gif/AliSTARTv0.gif">
  69   */
  70   //
  71
  72
  73   Int_t *idtmed = fIdtmed->GetArray()-2099;
  74
  75   Int_t is;
  76   Int_t idrotm[999];
  77   Float_t x,y,z;
  78
  79   Float_t pstart[3]={4.5,10.7,5.3};
  80   //  Float_t pscin[3]={0.,2.54/2.,1.5};
  81   Float_t ppmt[3]={0.,1.3,3.5};
  82   Float_t pdivider[3]={0.,1.2,1.75};
  83   Float_t pdiv2[3]={0.,1.2,1.25};
  84   Float_t pdiv1[3]={0.6,1.2,0.5};
  85   Float_t ptop[3]={0.,1.3,1.5};
  86   Float_t pbot[3]={0.6,1.2,0.1};
  87   Float_t pglass[3]={1.2,1.3,2.};
  88   Float_t pcer[3]={0.9,1.1,0.09};
  89   Float_t psteel[3]={0.9,1.1,0.01};
  90   Float_t ppins[3]={0.6,1.2,0.014};
  91   Float_t phole[3]={0.6,1.2,0.015};
  92   Float_t pknob[3]={0.5,0.6,0.4};
  93   Float_t pknob_vac[3]={0.,0.5,0.4};
  94   Float_t pknob_bot[3]={0.,0.6,0.05};
  95   Float_t pribber[3] = {0.,1.2,2.413/2.};
  96   Float_t presist[3] = {0.,1.2,0.087/2.};
  97
  98   Float_t zdet=75.;
  99  //-------------------------------------------------------------------
 100  //  START volume
 101  //-------------------------------------------------------------------
 102
 103     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 104     gMC->Gsvolu("STRT","TUBE",idtmed[2101-1],pstart,3);
 105     gMC->Gspos("STRT",1,"ALIC",0.,0.,zdet,0,"ONLY");
 106     gMC->Gspos("STRT",2,"ALIC",0.,0.,-zdet,idrotm[901],"ONLY");
 107
 108 //START interior
 109     //    gMC->Gsvolu("SCIN","TUBE",idtmed[2102-1],pscin,3);
 110     gMC->Gsvolu("PMT ","TUBE",idtmed[2103-1],ppmt,3);
 111     gMC->Gsvolu("DIVI","TUBE",idtmed[2103-1],pdivider,3);
 112
 113 // first ring: 13 units of Scintillator+PMT+divider
 114     for (is=1; is<=13; is++)
 115     {
 116       x=6.5*TMath::Sin(is*2*3.1415/13);
 117       y=6.5*TMath::Cos(is*2*3.1415/13);
 118       z=-pstart[2]+ppmt[2];
 119       printf(" is %d x %f y %f r%f\n",is,x,y,sqrt(x*x+y*y));
 120       //      gMC->Gspos("SCIN",is,"STRT",x,y,z,0,"ONLY");
 121       //      z=z+pscin[2]+ppmt[2];
 122       gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 123       z=ppmt[2]+pdivider[2];
 124       printf(" is %d, z Divider %f\n",is,z);
 125       gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 126     }
 127 //second ring: 20 units of Scintillator+PMT+divider
 128     for (is=14; is<=33;is++)
 129     {
 130       x=9.3*TMath::Sin(2.*3.1415/26+(is-13)*2*3.1415/20);
 131       y=9.3*TMath::Cos(2.*3.1315/26+(is-13)*2*3.1415/20);
 132       z=-pstart[2]+ppmt[2];
 133       //      gMC->Gspos("SCIN",is,"STRT",x,y,z,0,"ONLY");
 134       //z=z+pscin[2]+ppmt[2];
 135       gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 136       z=ppmt[2]+pdiv2[2];
 137       gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 138     }
 139 // PMT
 140
 141 // Entry window (glass)
 142       gMC->Gsvolu("PTOP","TUBE",idtmed[2106-1],ptop,3);
 143       z=-ppmt[2]+ptop[2];
 144       gMC->Gspos("PTOP",1,"PMT ",0,0,z,0,"ONLY");
 145  //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 146 // Bottom glass
 147       gMC->Gsvolu("PBOT","TUBE",idtmed[2106-1],pbot,3);
 148       z=ppmt[2]-pbot[2];
 149       printf("Z bottom %f\n",z);
 150       gMC->Gspos("PBOT",1,"PMT ",0,0,z,0,"ONLY");
 151 // Side cylinder glass
 152       gMC->Gsvolu("POUT","TUBE",idtmed[2106-1],pglass,3);
 153       z=ppmt[2]-pglass[2];
 154 //      printf("Z glass %f\n",z);
 155       gMC->Gspos("POUT",1,"PMT ",0,0,z,0,"ONLY");
 156 //PMT electrodes support structure
 157       gMC->Gsvolu("PCER","TUBE",idtmed[2104-1],pcer,3);
 158       gMC->Gsvolu("PSTE","TUBE",idtmed[2108-1],psteel,3);
 159       z=-ppmt[2]+2*ptop[2]+0.3;;
 160 //      printf("Z Cer 1 %f\n",z);
 161       for (is=1; is<=15; is++)
 162       {
 163          z=z+psteel[2]+pcer[2];
 164          gMC->Gspos("PCER",is,"PMT",0,0,z,0,"ONLY");
 165          z=z+psteel[2]+pcer[2];
 166          gMC->Gspos("PSTE",is,"PMT",0,0,z,0,"ONLY");
 167        }
 168
 169 // Divider
 170 // Knob at the bottom of PMT baloon
 171       gMC->Gsvolu("KNOB","TUBE",idtmed[2106-1],pknob,3);
 172       z=-pdivider[2]+pknob[2];
 173 //      printf("zknob %f\n",z);
 174       gMC->Gspos("KNOB",1,"DIVI",0,0,z,0,"ONLY");
 175       gMC->Gsvolu("KNBO","TUBE",idtmed[2106-1],pknob_bot,3);
 176       z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 177 //      printf("knobbot %f\n",z);
 178       gMC->Gspos("KNBO",1,"DIVI ",0,0,z,0,"ONLY");
 179       gMC->Gsvolu("KNVA","TUBE",idtmed[2106-1],pknob_vac,3);
 180       z=-pdivider[2]+pknob_vac[2];
 181 //      printf("knobvac %f\n",z);
 182       gMC->Gspos("KNVA",1,"DIVI",0,0,z,0,"ONLY");
 183  //Steel pins + pin holes
 184       gMC->Gsvolu("PINS","TUBE",idtmed[2108-1],ppins,3);
 185       z=-pdivider[2]+ppins[2];
 186       gMC->Gspos("PINS",1,"DIVI",0,0,z,0,"ONLY");
 187       gMC->Gsvolu("HOLE","TUBE",idtmed[2111-1],phole,3);
 188       z=-pdivider[2]+2*ppins[2]+phole[2];
 189       gMC->Gspos("HOLE",1,"DIVI",0,0,z,0,"ONLY");
 190
 191 //Socket
 192       gMC->Gsvolu("DIV1","TUBE",idtmed[2104-1],pdiv1,3);
 193       z=-pdivider[2]+pdiv1[2];
 194       gMC->Gspos("DIV1",1,"DIVI",0,0,z,0,"ONLY");
 195 //Resistors
 196       gMC->Gsvolu("DIV2","TUBE",idtmed[2101-1],pdiv2,3);
 197       z=pdivider[2]-pdiv2[2];
 198       gMC->Gspos("DIV2",1,"DIVI",0,0,z,0,"ONLY");
 199       gMC->Gsvolu("DRES","TUBE",idtmed[2104-1],presist,3);
 200       z=-pdiv2[2]+presist[2];
 201       gMC->Gspos("DRES",1,"DIV2",0,0,z,0,"ONLY");
 202       gMC->Gsvolu("DRIB","TUBE",idtmed[2109-1],pribber,3);
 203       z=pdiv2[2]-pribber[2];
 204       gMC->Gspos("DRIB",1,"DIV2",0,0,z,0,"ONLY");
 205 //      printf("z DRIB %f\n",z);
 206
 207 }
 208 //------------------------------------------------------------------------
 209 void AliSTARTv0::CreateMaterials()
 210 {
 211    Int_t ISXFLD   = gAlice->Field()->Integ();
 212    Float_t SXMGMX = gAlice->Field()->Max();
 213    Float_t a,z,d,radl,absl,buf[1];
 214    Int_t nbuf;
 215
 216 // Scintillator CH
 217    //    Float_t ascin[2]={1.01,12.01};
 218    // Float_t zscin[2]={1,6};
 219    // Float_t wscin[2]={1,1};
 220    // Float_t denscin=1.03;
 221 // PMT glass SiO2
 222     Float_t aglass[2]={28.0855,15.9994};
 223     Float_t zglass[2]={14.,8.};
 224     Float_t wglass[2]={1.,2.};
 225     Float_t dglass=2.65;
 226 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 227     Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 228     Float_t aal2o3[2]  = { 26.981539,15.9994 };
 229     Float_t zal2o3[2]  = { 13.,8. };
 230     Float_t wal2o3[2]  = { 2.,3. };
 231     Float_t denscer  = 3.6;
 232
 233 // Brass 80% Cu, 20% Zn
 234    Float_t abrass[2] = {63.546,65.39};
 235    Float_t zbrass[2] = {29,30};
 236    Float_t wbrass[2] = {0.8,0.2};
 237    Float_t denbrass=8.96;
 238
 239 //Ribber C6H12S
 240    Float_t aribber[3] = {12.,1.,32.};
 241    Float_t zribber[3] = {6.,1.,16.};
 242    Float_t wribber[3] = {6.,12.,1.};
 243    Float_t denribber=0.8;
 244
 245
 246 //   AliMC* gMC = AliMC::GetMC();
 247
 248  //  Int_t *idtmed = gAlice->Idtmed();
 249  //  Int_t imat;
 250
 251 //*** Definition Of avaible START materials ***
 252  AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 253  AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 254  AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 255
 256  AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 257  AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 258   char namate[21];
 259   gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 260   acer[0]=a;
 261   zcer[0]=z;
 262   gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 263   acer[1]=a;
 264   zcer[1]=z;
 265
 266  AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 267  // AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 268  AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 269
 270  AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 271
 272
 273
 274 //**
 275  AliMedium(1, "START Air$", 2, 0, ISXFLD, SXMGMX, 10., .1, 1., .003, .003);
 276  // AliMedium(2102, "Scintillator$", 5, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003);
 277  AliMedium(3, "Vacuum$", 1, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 278  AliMedium(4, "Ceramic$", 9, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 279  AliMedium(6, "Glass$", 4, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 280  AliMedium(8, "Steel$", 0, 0, ISXFLD, SXMGMX, 1., .001, 1., .001, .001);
 281  AliMedium(11, "Brass  $", 6, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 282  AliMedium(9, "Ribber  $", 7, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 283
 284
 285 }
 286 //---------------------------------------------------------------------
 287 void AliSTARTv0::DrawModule()
 288 {
 289 //
 290 // Draw a shaded view of the Forward multiplicity detector version 0
 291 //
 292
 293 //Set ALIC mother transparent
 294 gMC->Gsatt("ALIC","SEEN",0);
 295 //
 296 //Set volumes visible
 297 gMC->Gsatt("STRT","SEEN",0);
 298 //gMC->Gsatt("SCIN","SEEN",1);
 299 gMC->Gsatt("PMT ","SEEN",1);
 300 gMC->Gsatt("DIVI","SEEN",1);
 301 //
 302 gMC->Gdopt("hide","on");
 303 gMC->Gdopt("shad","on");
 304 gMC->SetClipBox(".");
 305 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 306 gMC->DefaultRange();
 307 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 308 gMC->Gdhead(1111,"T-Zero detector");
 309 gMC->Gdopt("hide","off");
 310 }
 311 //-------------------------------------------------------------------
 312 void AliSTARTv0::Init()
 313 {
 314   // Initialises version 0 of the Forward Multiplicity Detector
 315   //
 316
 317   //Int_t *idtmed  = gAlice->Idtmed();
 318   AliSTART::Init();
 319   fIdSens1=gMC->VolId("PTOP");
 320   printf("*** START version 0 initialized ***\n");
 321
 322 }
 323
 324 //-------------------------------------------------------------------
 325
 326 void AliSTARTv0::StepManager()
 327 {
 328   //
 329   // Called for every step in the START Detector
 330   //
 331   Int_t id,copy,copy1;
 332   static Float_t hits[7];
 333   static Float_t edep;
 334   static Int_t vol[2];
 335   TLorentzVector pos;
 336
 337   TClonesArray &lhits = *fHits;
 338   //AliMC* gMC=AliMC::GetMC();
 339   //  TGeant3* geant3= (TGeant3*)gMC;
 340
 341   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 342   Float_t charge = gMC->TrackCharge();
 343   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 344  //    gMC->Gpcxyz();
 345     id=gMC->CurrentVolID(copy);
 346
 347
 348 //  printf("igauto %d\n",gMC->ctrak->igauto);
 349 //  printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
 350 // Check the sensetive volume
 351    if(id==fIdSens1 )
 352    {
 353      if(gMC->IsTrackEntering())
 354      {
 355        gMC->CurrentVolOffID(2,copy);
 356        vol[0]=copy;
 357        gMC->CurrentVolOffID(1,copy1);
 358        vol[1]=copy1;
 359        gMC->TrackPosition(pos);
 360        hits[0] = pos[0];
 361        hits[1] = pos[1];
 362        hits[2] = pos[2];
 363        Float_t etot=gMC->Etot();
 364        hits[4]=etot;
 365        Int_t part= gMC->TrackPid();
 366        hits[5]=part;
 367        Float_t ttime=gMC->TrackTime();
 368        hits[6]=ttime*1e9;
 369        edep=0;
 370        //       Float_t xV=geant3->Gckine()->vert[0];
 371        //Float_t yV=geant3->Gckine()->vert[1];
 372        //Float_t zV=geant3->Gckine()->vert[2];
 373        //Float_t tl=gMC -> TrackLength();
 374        //      if(hits[6]<2.4){
 375        //           for (i=0; i<=6; i++){
 376        //           printf(" HITS on START entr %f\n",hits[i]);}
 377        //}
 378      }
 379      if(gMC->IsTrackInside())
 380      {
 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     {
 389        Float_t de=gMC->Edep();
 390        edep=edep+de;
 391        hits[3]=edep*1e3;
 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
 402
 403
 404
 405
 406