START/AliSTARTv1.cxx

   1 /////////////////////////////////////////////////////////////////////
   2 //                                                                 //
   3 // START ( T-zero) detector  version 0                        //
   4 //
   5 //Begin Html
   6 /*
   7 <img src="gif/AliSTARTv0Class.gif">
   8 */
   9 //End Html
  10 //                                                                  //
  11 //                                                                  //
  12 //////////////////////////////////////////////////////////////////////
  13
  14 #include <TMath.h>
  15 #include <TGeometry.h>
  16 #include <TTUBE.h>
  17 #include <TNode.h>
  18
  19 #include "AliSTARTv0.h"
  20 #include "AliRun.h"
  21 #include "AliMC.h"
  22
  23 #include <iostream.h>
  24 #include <fstream.h>
  25
  26 #include "TGeant3.h"
  27 #include <stdlib.h>
  28
  29 ClassImp(AliSTARTv0)
  30
  31 //--------------------------------------------------------------------
  32 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  33  AliSTART(name,title)
  34 {
  35   //
  36   // Standart constructor for START Detector version 0
  37   //
  38   fIdSens1=0;
  39 //  setBufferSize(128000);
  40 }
  41 //-------------------------------------------------------------------------
  42 void AliSTARTv1::CreateGeometry()
  43 {
  44   //
  45   // Create the geometry of START Detector version 0
  46   //
  47   // begin Html
  48   /*
  49    <img src="gif/AliSTARTv0.gif">
  50   */
  51   //
  52
  53   AliMC* pMC = AliMC::GetMC();
  54
  55   Int_t *idtmed = gAlice->Idtmed();
  56
  57   Int_t is;
  58   Int_t idrotm[999];
  59   Float_t x,y,z;
  60
  61   Float_t pstart[3]={5.,10.2,5.3};
  62   //  Float_t pscin[3]={0.,2.54/2.,1.5};
  63   Float_t ppmt[3]={0.,1.3,3.5};
  64   Float_t pdivider[3]={0.,1.2,1.75};
  65   Float_t pdiv2[3]={0.,1.2,1.25};
  66   Float_t pdiv1[3]={0.6,1.2,0.5};
  67   Float_t ptop[3]={0.,1.3,1.5};
  68   Float_t pbot[3]={0.6,1.2,0.1};
  69   Float_t pglass[3]={1.2,1.3,2.};
  70   Float_t pcer[3]={0.9,1.1,0.09};
  71   Float_t psteel[3]={0.9,1.1,0.01};
  72   Float_t ppins[3]={0.6,1.2,0.014};
  73   Float_t phole[3]={0.6,1.2,0.015};
  74   Float_t pknob[3]={0.5,0.6,0.4};
  75   Float_t pknob_vac[3]={0.,0.5,0.4};
  76   Float_t pknob_bot[3]={0.,0.6,0.05};
  77   Float_t pribber[3] = {0.,1.2,2.413/2.};
  78   Float_t presist[3] = {0.,1.2,0.087/2.};
  79
  80   Float_t zdet=75.;
  81  //-------------------------------------------------------------------
  82  //  START volume
  83  //-------------------------------------------------------------------
  84
  85     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
  86     pMC->Gsvolu("STRT","TUBE",idtmed[2101-1],pstart,3);
  87     pMC->Gspos("STRT",1,"ALIC",0.,0.,zdet,0,"ONLY");
  88     pMC->Gspos("STRT",2,"ALIC",0.,0.,-zdet,idrotm[901],"ONLY");
  89
  90 //START interior
  91     //    pMC->Gsvolu("SCIN","TUBE",idtmed[2102-1],pscin,3);
  92     pMC->Gsvolu("PMT ","TUBE",idtmed[2103-1],ppmt,3);
  93     pMC->Gsvolu("DIVI","TUBE",idtmed[2103-1],pdivider,3);
  94
  95 // first ring: 13 units of Scintillator+PMT+divider
  96     for (is=1; is<=13; is++)
  97     {
  98       x=6*TMath::Sin(is*2*3.1415/13);
  99       y=6*TMath::Cos(is*2*3.1415/13);
 100       z=-pstart[2]+ppmt[2];
 101       printf(" is %d, z PMT %f\n",is,z);
 102       //      pMC->Gspos("SCIN",is,"STRT",x,y,z,0,"ONLY");
 103       //      z=z+pscin[2]+ppmt[2];
 104       pMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 105       z=ppmt[2]+pdivider[2];
 106       printf(" is %d, z Divider %f\n",is,z);
 107       pMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 108     }
 109 //second ring: 20 units of Scintillator+PMT+divider
 110     for (is=14; is<=33;is++)
 111     {
 112       x=8.8*TMath::Sin(2.*3.1415/26+(is-13)*2*3.1415/20);
 113       y=8.8*TMath::Cos(2.*3.1315/26+(is-13)*2*3.1415/20);
 114       z=-pstart[2]+ppmt[2];
 115       //      pMC->Gspos("SCIN",is,"STRT",x,y,z,0,"ONLY");
 116       //z=z+pscin[2]+ppmt[2];
 117       pMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 118       z=ppmt[2]+pdiv2[2];
 119       pMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 120     }
 121 // PMT
 122
 123 // Entry window (glass)
 124       pMC->Gsvolu("PTOP","TUBE",idtmed[2106-1],ptop,3);
 125       z=-ppmt[2]+ptop[2];
 126       pMC->Gspos("PTOP",1,"PMT ",0,0,z,0,"ONLY");
 127       printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 128 // Bottom glass
 129       pMC->Gsvolu("PBOT","TUBE",idtmed[2106-1],pbot,3);
 130       z=ppmt[2]-pbot[2];
 131       printf("Z bottom %f\n",z);
 132       pMC->Gspos("PBOT",1,"PMT ",0,0,z,0,"ONLY");
 133 // Side cylinder glass
 134       pMC->Gsvolu("POUT","TUBE",idtmed[2106-1],pglass,3);
 135       z=ppmt[2]-pglass[2];
 136       printf("Z glass %f\n",z);
 137       pMC->Gspos("POUT",1,"PMT ",0,0,z,0,"ONLY");
 138 //PMT electrodes support structure
 139       pMC->Gsvolu("PCER","TUBE",idtmed[2104-1],pcer,3);
 140       pMC->Gsvolu("PSTE","TUBE",idtmed[2108-1],psteel,3);
 141       z=-ppmt[2]+2*ptop[2]+0.3;;
 142       printf("Z Cer 1 %f\n",z);
 143       for (is=1; is<=15; is++)
 144       {
 145          z=z+psteel[2]+pcer[2];
 146          pMC->Gspos("PCER",is,"PMT",0,0,z,0,"ONLY");
 147          z=z+psteel[2]+pcer[2];
 148          pMC->Gspos("PSTE",is,"PMT",0,0,z,0,"ONLY");
 149        }
 150
 151 // Divider
 152 // Knob at the bottom of PMT baloon
 153       pMC->Gsvolu("KNOB","TUBE",idtmed[2106-1],pknob,3);
 154       z=-pdivider[2]+pknob[2];
 155 //      printf("zknob %f\n",z);
 156       pMC->Gspos("KNOB",1,"DIVI",0,0,z,0,"ONLY");
 157       pMC->Gsvolu("KNBO","TUBE",idtmed[2106-1],pknob_bot,3);
 158       z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 159 //      printf("knobbot %f\n",z);
 160       pMC->Gspos("KNBO",1,"DIVI ",0,0,z,0,"ONLY");
 161       pMC->Gsvolu("KNVA","TUBE",idtmed[2106-1],pknob_vac,3);
 162       z=-pdivider[2]+pknob_vac[2];
 163 //      printf("knobvac %f\n",z);
 164       pMC->Gspos("KNVA",1,"DIVI",0,0,z,0,"ONLY");
 165  //Steel pins + pin holes
 166       pMC->Gsvolu("PINS","TUBE",idtmed[2108-1],ppins,3);
 167       z=-pdivider[2]+ppins[2];
 168       pMC->Gspos("PINS",1,"DIVI",0,0,z,0,"ONLY");
 169       pMC->Gsvolu("HOLE","TUBE",idtmed[2111-1],phole,3);
 170       z=-pdivider[2]+2*ppins[2]+phole[2];
 171       pMC->Gspos("HOLE",1,"DIVI",0,0,z,0,"ONLY");
 172
 173 //Socket
 174       pMC->Gsvolu("DIV1","TUBE",idtmed[2104-1],pdiv1,3);
 175       z=-pdivider[2]+pdiv1[2];
 176       pMC->Gspos("DIV1",1,"DIVI",0,0,z,0,"ONLY");
 177 //Resistors
 178       pMC->Gsvolu("DIV2","TUBE",idtmed[2101-1],pdiv2,3);
 179       z=pdivider[2]-pdiv2[2];
 180       pMC->Gspos("DIV2",1,"DIVI",0,0,z,0,"ONLY");
 181       pMC->Gsvolu("DRES","TUBE",idtmed[2104-1],presist,3);
 182       z=-pdiv2[2]+presist[2];
 183       pMC->Gspos("DRES",1,"DIV2",0,0,z,0,"ONLY");
 184       pMC->Gsvolu("DRIB","TUBE",idtmed[2109-1],pribber,3);
 185       z=pdiv2[2]-pribber[2];
 186       pMC->Gspos("DRIB",1,"DIV2",0,0,z,0,"ONLY");
 187       printf("z DRIB %f\n",z);
 188
 189 }
 190 //------------------------------------------------------------------------
 191 void AliSTARTv1::CreateMaterials()
 192 {
 193    Int_t ISXFLD   = gAlice->Field()->Integ();
 194    Float_t SXMGMX = gAlice->Field()->Max();
 195    Float_t a,z,d,radl,absl,buf[1];
 196    Int_t nbuf;
 197
 198 // Scintillator CH
 199    //    Float_t ascin[2]={1.01,12.01};
 200    // Float_t zscin[2]={1,6};
 201    // Float_t wscin[2]={1,1};
 202    // Float_t denscin=1.03;
 203 // PMT glass SiO2
 204     Float_t aglass[2]={28.0855,15.9994};
 205     Float_t zglass[2]={14.,8.};
 206     Float_t wglass[2]={1.,2.};
 207     Float_t dglass=2.65;
 208 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 209     Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 210     Float_t aal2o3[2]  = { 26.981539,15.9994 };
 211     Float_t zal2o3[2]  = { 13.,8. };
 212     Float_t wal2o3[2]  = { 2.,3. };
 213     Float_t denscer  = 3.6;
 214
 215 // Brass 80% Cu, 20% Zn
 216    Float_t abrass[2] = {63.546,65.39};
 217    Float_t zbrass[2] = {29,30};
 218    Float_t wbrass[2] = {0.8,0.2};
 219    Float_t denbrass=8.96;
 220
 221 //Ribber C6H12S
 222    Float_t aribber[3] = {12.,1.,32.};
 223    Float_t zribber[3] = {6.,1.,16.};
 224    Float_t wribber[3] = {6.,12.,1.};
 225    Float_t denribber=0.8;
 226
 227
 228    AliMC* pMC = AliMC::GetMC();
 229
 230    Int_t *idtmed = gAlice->Idtmed();
 231    Int_t imat;
 232
 233 //*** Definition Of avaible START materials ***
 234  AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 235  AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 236  AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 237
 238  AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wcer);
 239  AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 240   char namate[21];
 241   pMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 242   acer[0]=a;
 243   zcer[0]=z;
 244   pMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 245   acer[1]=a;
 246   zcer[1]=z;
 247
 248  AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 249  // AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 250  AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 251
 252  AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 253
 254
 255
 256 //**
 257  AliMedium(2101, "START Air$", 2, 0, ISXFLD, SXMGMX, 10., .1, 1., .003, .003);
 258  // AliMedium(2102, "Scintillator$", 5, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003);
 259  AliMedium(2103, "Vacuum$", 1, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 260  AliMedium(2104, "Ceramic$", 9, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 261  AliMedium(2106, "Glass$", 4, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 262  AliMedium(2108, "Steel$", 0, 0, ISXFLD, SXMGMX, 1., .001, 1., .001, .001);
 263  AliMedium(2111, "Brass  $", 6, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 264  AliMedium(2109, "Ribber  $", 7, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 265
 266
 267 }
 268 //---------------------------------------------------------------------
 269 void AliSTARTv1::DrawDetector()
 270 {
 271 //
 272 // Draw a shaded view of the Forward multiplicity detector version 0
 273 //
 274
 275 AliMC* pMC = AliMC::GetMC();
 276
 277 //Set ALIC mother transparent
 278 pMC->Gsatt("ALIC","SEEN",0);
 279 //
 280 //Set volumes visible
 281 pMC->Gsatt("STRT","SEEN",0);
 282 //pMC->Gsatt("SCIN","SEEN",1);
 283 pMC->Gsatt("PMT ","SEEN",1);
 284 pMC->Gsatt("DIVI","SEEN",1);
 285 //
 286 pMC->Gdopt("hide","on");
 287 pMC->Gdopt("shad","on");
 288 pMC->SetClipBox(".");
 289 pMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 290 pMC->DefaultRange();
 291 pMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 292 pMC->Gdhead(1111,"T-Zero detector");
 293 pMC->Gdopt("hide","off");
 294 }
 295 //-------------------------------------------------------------------
 296 void AliSTARTv1::Init()
 297 {
 298 // Initialises version 0 of the Forward Multiplicity Detector
 299 //
 300 AliMC* pMC=AliMC::GetMC();
 301 //Int_t *idtmed  = gAlice->Idtmed();
 302 AliSTART::Init();
 303 fIdSens1=pMC->VolId("PTOP");
 304 printf("*** START version 0 initialized ***\n");
 305
 306 }
 307
 308 //-------------------------------------------------------------------
 309
 310 void AliSTARTv1::StepManager()
 311 {
 312   //
 313   // Called for every step in the START Detector
 314   //
 315   Int_t id,copy,copy1,i;
 316   static Float_t hits[7];
 317   static Float_t edep;
 318   static Int_t vol[2];
 319
 320   TClonesArray &lhits = *fHits;
 321   AliMC* pMC=AliMC::GetMC();
 322   TGeant3* geant3= (TGeant3*)pMC;
 323
 324   if(!pMC->TrackAlive()) return; // particle has disappeared
 325   Float_t charge = pMC->TrackCharge();
 326   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 327   //    geant3->Gpcxyz();
 328     id=pMC->CurrentVol(0,copy);
 329
 330
 331 //  printf("igauto %d\n",pMC->ctrak->igauto);
 332 //  printf("pMC->ckine->ipart %d",pMC->ckine->ipart);
 333 // Check the sensetive volume
 334    if(id==fIdSens1 )
 335    {
 336      if(pMC->TrackEntering())
 337      {
 338        pMC->CurrentVolOff(2,0,copy);
 339        vol[0]=copy;
 340        pMC->CurrentVolOff(1,0,copy1);
 341        vol[1]=copy1;
 342        pMC->TrackPosition(hits);
 343        Float_t etot=pMC->Etot();
 344 //    printf("pMC->ctrak->ekin %f\n",pMC->ctrak->Ekin);
 345        hits[4]=etot;
 346        Int_t part= pMC->TrackPid();
 347        hits[5]=part;
 348        Float_t ttime=geant3->Gctrak()->tofg;
 349        hits[6]=ttime*1e9;
 350        edep=0;
 351        //       Float_t xV=geant3->Gckine()->vert[0];
 352        //Float_t yV=geant3->Gckine()->vert[1];
 353        //Float_t zV=geant3->Gckine()->vert[2];
 354        //Float_t tl=pMC -> TrackLength();
 355        //      if(hits[6]<2.4){
 356        //           for (i=0; i<=6; i++){
 357        //           printf(" HITS on START entr %f\n",hits[i]);}
 358        //}
 359      }
 360      if(pMC->TrackInside())
 361      {
 362        Float_t de=pMC->Edep();
 363        edep=edep+de;
 364 //       printf ("E deposition %f\n",edep);
 365 //    for (i=0; i<=6; i++){
 366 //    printf(" HITS on START inside %f\n",hits[i]); }
 367      }
 368      if(pMC->TrackExiting())
 369     {
 370        Float_t de=pMC->Edep();
 371        edep=edep+de;
 372        hits[3]=edep*1e3;
 373        //       for (i=0; i<=6; i++){
 374        //        printf(" HITS on START Exit %f\n",hits[i]); }
 375        //for (i=0; i<=1; i++) { printf("START vol %d\n",vol[i]);}
 376
 377     new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);      }
 378     }
 379 //---------------------------------------------------------------------
 380     }
 381  //}
 382
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