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