START/AliSTARTv1.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  *                                                                        *
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  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
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  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16
  17 /////////////////////////////////////////////////////////////////////
  18 //                                                                 //
  19 // START ( T-zero) detector  version 1                             //
  20 //
  21 //Begin Html
  22 /*
  23 <img src="gif/AliSTARTv1Class.gif">
  24 */
  25 //End Html
  26 //                                                                  //
  27 //                                                                  //
  28 //////////////////////////////////////////////////////////////////////
  29
  30 #include <TMath.h>
  31 #include <TGeometry.h>
  32 #include <TTUBE.h>
  33 #include <TNode.h>
  34
  35 #include "AliSTARTv1.h"
  36 #include "AliRun.h"
  37 #include "AliMC.h"
  38 #include "AliSTARThit.h"
  39
  40 #include <iostream.h>
  41 #include <fstream.h>
  42
  43 //#include "TGeant3.h"
  44 #include <stdlib.h>
  45
  46 ClassImp(AliSTARTv1)
  47
  48 //--------------------------------------------------------------------
  49 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  50  AliSTART(name,title)
  51 {
  52   //
  53   // Standart constructor for START Detector version 0
  54   //
  55   fIdSens1=0;
  56 //  setBufferSize(128000);
  57 }
  58 //-------------------------------------------------------------------------
  59 void AliSTARTv1::CreateGeometry()
  60 {
  61   //
  62   // Create the geometry of START Detector version 0
  63   //
  64   // begin Html
  65   /*
  66    <img src="gif/AliSTARTv0.gif">
  67   */
  68   //
  69
  70
  71   Int_t *idtmed = fIdtmed->GetArray();
  72
  73   Int_t is;
  74   Int_t idrotm[999];
  75   Float_t x,y,z;
  76
  77   Float_t pstart[3]={4.5,10.7,5.3};
  78   Float_t ppmt[3]={0.,1.3,3.5};
  79   Float_t pdivider[3]={0.,1.2,1.75};
  80   Float_t pdiv2[3]={0.,1.2,1.25};
  81   Float_t pdiv1[3]={0.6,1.2,0.5};
  82   Float_t ptop[3]={0.,1.3,1.5};
  83   Float_t pbot[3]={0.6,1.2,0.1};
  84   Float_t pglass[3]={1.2,1.3,2.};
  85   Float_t pcer[3]={0.9,1.1,0.09};
  86   Float_t psteel[3]={0.9,1.1,0.01};
  87   Float_t ppins[3]={0.6,1.2,0.014};
  88   Float_t phole[3]={0.6,1.2,0.015};
  89   Float_t pknob[3]={0.5,0.6,0.4};
  90   Float_t pknob_vac[3]={0.,0.5,0.4};
  91   Float_t pknob_bot[3]={0.,0.6,0.05};
  92   Float_t pribber[3] = {0.,1.2,2.413/2.};
  93   Float_t presist[3] = {0.,1.2,0.087/2.};
  94
  95   Float_t zdet=75.;
  96  //-------------------------------------------------------------------
  97  //  START volume
  98  //-------------------------------------------------------------------
  99
 100   //  Float_t theta=TMath::ATan(6.5/zdet);
 101   Float_t theta=(180./3.1415)*TMath::ATan(6.5/zdet);
 102     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 103
 104     gMC->Gsvolu("STRT","TUBE",idtmed[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("PMT ","TUBE",idtmed[3],ppmt,3);
 110     gMC->Gsvolu("DIVI","TUBE",idtmed[3],pdivider,3);
 111
 112 // first ring: 12 units of Scintillator+PMT+divider
 113     Double_t dang1 = 2*TMath::Pi()/12;
 114     for (is=1; is<=12; is++)
 115       {
 116         AliMatrix(idrotm[901+is],
 117                   90.-theta, 30.*is,
 118                   90.,       90.+30.*is,
 119                   theta,    180.+30.*is);
 120         x=6.5*TMath::Sin(is*dang1);
 121         y=6.5*TMath::Cos(is*dang1);
 122         z=-pstart[2]+ppmt[2];
 123         gMC->Gspos("PMT ",is,"STRT",x,y,z,idrotm[901+is],"ONLY");
 124         printf("z PMT %f\n",z);
 125         z=z+ppmt[2]+pdiv2[2]-pdiv1[2];
 126         printf(" is %d, z Divider %f\n",is,z);
 127         gMC->Gspos("DIVI",is,"STRT",x,y,z,idrotm[901+is],"ONLY");
 128       }
 129      /*
 130 //second ring: 20 units of Scintillator+PMT+divider
 131       Double_t dang2 = 2*TMath::Pi()/26;
 132       Double_t dang3 = 2*TMath::Pi()/20;
 133        for (is=14; is<=33;is++)
 134      {
 135      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
 136      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
 137       z=-pstart[2]+ppmt[2];
 138       gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
 139       z=z+ppmt[2]+pdiv2[2];
 140       gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
 141       }
 142      */
 143 // PMT
 144
 145     // Entry window (glass)
 146     gMC->Gsvolu("PTOP","TUBE",idtmed[6],ptop,3);
 147     z=-ppmt[2]+ptop[2];
 148     gMC->Gspos("PTOP",1,"PMT ",0,0,z,0,"ONLY");
 149     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 150     // Bottom glass
 151     gMC->Gsvolu("PBOT","TUBE",idtmed[6],pbot,3);
 152     z=ppmt[2]-pbot[2];
 153     printf("Z bottom %f\n",z);
 154     gMC->Gspos("PBOT",1,"PMT ",0,0,z,0,"ONLY");
 155     // Side cylinder glass
 156     gMC->Gsvolu("POUT","TUBE",idtmed[6],pglass,3);
 157     z=ppmt[2]-pglass[2];
 158     //      printf("Z glass %f\n",z);
 159     gMC->Gspos("POUT",1,"PMT ",0,0,z,0,"ONLY");
 160     //PMT electrodes support structure
 161     gMC->Gsvolu("PCER","TUBE",idtmed[4],pcer,3);
 162     gMC->Gsvolu("PSTE","TUBE",idtmed[8],psteel,3);
 163     z=-ppmt[2]+2*ptop[2]+0.3;;
 164     //      printf("Z Cer 1 %f\n",z);
 165     for (is=1; is<=15; is++)
 166       {
 167         z=z+psteel[2]+pcer[2];
 168         gMC->Gspos("PCER",is,"PMT",0,0,z,0,"ONLY");
 169         z=z+psteel[2]+pcer[2];
 170         gMC->Gspos("PSTE",is,"PMT",0,0,z,0,"ONLY");
 171       }
 172
 173     // Divider
 174     // Knob at the bottom of PMT baloon
 175
 176     gMC->Gsvolu("KNOB","TUBE",idtmed[6],pknob,3);
 177     z=-pdivider[2]+pknob[2];
 178     //      printf("zknob %f\n",z);
 179     gMC->Gspos("KNOB",1,"DIVI",0,0,z,0,"ONLY");
 180     gMC->Gsvolu("KNBO","TUBE",idtmed[6],pknob_bot,3);
 181     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 182     //      printf("knobbot %f\n",z);
 183     gMC->Gspos("KNBO",1,"DIVI ",0,0,z,0,"ONLY");
 184     gMC->Gsvolu("KNVA","TUBE",idtmed[3],pknob_vac,3);
 185     z=-pdivider[2]+pknob_vac[2];
 186     //      printf("knobvac %f\n",z);
 187     gMC->Gspos("KNVA",1,"DIVI",0,0,z,0,"ONLY");
 188     //Steel pins + pin holes
 189     gMC->Gsvolu("PINS","TUBE",idtmed[8],ppins,3);
 190     z=-pdivider[2]+ppins[2];
 191     gMC->Gspos("PINS",1,"DIVI",0,0,z,0,"ONLY");
 192     gMC->Gsvolu("HOLE","TUBE",idtmed[11],phole,3);
 193     z=-pdivider[2]+2*ppins[2]+phole[2];
 194     gMC->Gspos("HOLE",1,"DIVI",0,0,z,0,"ONLY");
 195
 196     //Socket
 197     gMC->Gsvolu("DIV1","TUBE",idtmed[4],pdiv1,3);
 198     z=-pdivider[2]+pdiv1[2];
 199     gMC->Gspos("DIV1",1,"DIVI",0,0,z,0,"ONLY");
 200     //Resistors
 201     gMC->Gsvolu("DIV2","TUBE",idtmed[1],pdiv2,3);
 202     z=pdivider[2]-pdiv2[2];
 203     gMC->Gspos("DIV2",1,"DIVI",0,0,z,0,"ONLY");
 204     gMC->Gsvolu("DRES","TUBE",idtmed[4],presist,3);
 205     z=-pdiv2[2]+presist[2];
 206     gMC->Gspos("DRES",1,"DIV2",0,0,z,0,"ONLY");
 207     gMC->Gsvolu("DRIB","TUBE",idtmed[9],pribber,3);
 208     z=pdiv2[2]-pribber[2];
 209     gMC->Gspos("DRIB",1,"DIV2",0,0,z,0,"ONLY");
 210     //      printf("z DRIB %f\n",z);
 211
 212
 213 }
 214 //------------------------------------------------------------------------
 215 void AliSTARTv1::CreateMaterials()
 216 {
 217    Int_t ISXFLD   = gAlice->Field()->Integ();
 218    Float_t SXMGMX = gAlice->Field()->Max();
 219    Float_t a,z,d,radl,absl,buf[1];
 220    Int_t nbuf;
 221
 222 // Scintillator CH
 223    Float_t ascin[2]={1.01,12.01};
 224    Float_t zscin[2]={1,6};
 225    Float_t wscin[2]={1,1};
 226    Float_t denscin=1.03;
 227 // PMT glass SiO2
 228    Float_t aglass[2]={28.0855,15.9994};
 229    Float_t zglass[2]={14.,8.};
 230    Float_t wglass[2]={1.,2.};
 231    Float_t dglass=2.65;
 232 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 233    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 234    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 235    Float_t zal2o3[2]  = { 13.,8. };
 236    Float_t wal2o3[2]  = { 2.,3. };
 237    Float_t denscer  = 3.6;
 238
 239 // Brass 80% Cu, 20% Zn
 240    Float_t abrass[2] = {63.546,65.39};
 241    Float_t zbrass[2] = {29,30};
 242    Float_t wbrass[2] = {0.8,0.2};
 243    Float_t denbrass=8.96;
 244
 245 //Ribber C6H12S
 246    Float_t aribber[3] = {12.,1.,32.};
 247    Float_t zribber[3] = {6.,1.,16.};
 248    Float_t wribber[3] = {6.,12.,1.};
 249    Float_t denribber=0.8;
 250    /*
 251 // Definition Cherenkov parameters
 252    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 };
 253    Float_t rindex_quarz[14] = { 1.528309,1.533333,
 254                                 1.538243,1.544223,1.550568,1.55777,
 255                                 1.565463,1.574765,1.584831,1.597027,
 256                                 1.611858,1.6277,1.6472,1.6724 };
 257
 258    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
 259                                 6.324,4.483,1.6,.323,.073,0. };
 260    */
 261    Int_t *idtmed = fIdtmed->GetArray()-2100;
 262
 263    //  TGeant3 *geant3 = (TGeant3*) gMC;
 264
 265 //*** Definition Of avaible START materials ***
 266    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 267    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 268    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 269
 270    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 271    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 272    char namate[21];
 273    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 274    acer[0]=a;
 275    zcer[0]=z;
 276    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 277    acer[1]=a;
 278    zcer[1]=z;
 279
 280    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 281    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 282    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 283
 284    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 285
 286
 287    AliMedium(1, "START Air$", 2, 0, ISXFLD, SXMGMX, 10., .1, 1., .003, .003);
 288    AliMedium(2, "Scintillator$", 5, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003);
 289    AliMedium(3, "Vacuum$", 1, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 290    AliMedium(4, "Ceramic$", 9, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 291    AliMedium(6, "Glass$", 4, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 292    AliMedium(8, "Steel$", 0, 0, ISXFLD, SXMGMX, 1., .001, 1., .001, .001);
 293    AliMedium(9, "Ribber  $", 7, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 294    AliMedium(11, "Brass  $", 6, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
 295    cout<<"++++++++++++++Medium set++++++++++"<<endl;
 296
 297 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 298
 299 }
 300 //---------------------------------------------------------------------
 301 void AliSTARTv1::DrawDetector()
 302 {
 303 //
 304 // Draw a shaded view of the Forward multiplicity detector version 0
 305 //
 306
 307   //Set ALIC mother transparent
 308   gMC->Gsatt("ALIC","SEEN",0);
 309   //
 310   //Set volumes visible
 311   gMC->Gsatt("STRT","SEEN",0);
 312   gMC->Gsatt("PMT ","SEEN",1);
 313   gMC->Gsatt("DIVI","SEEN",1);
 314   //
 315   gMC->Gdopt("hide","on");
 316   gMC->Gdopt("shad","on");
 317   gMC->SetClipBox(".");
 318   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 319   gMC->DefaultRange();
 320   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
 321   gMC->Gdhead(1111,"T-Zero detector");
 322   gMC->Gdopt("hide","off");
 323 }
 324
 325 //-------------------------------------------------------------------
 326 void AliSTARTv1::Init()
 327 {
 328 // Initialises version 0 of the Forward Multiplicity Detector
 329 //
 330 //Int_t *idtmed  = gAlice->Idtmed();
 331   AliSTART::Init();
 332   fIdSens1=gMC->VolId("PTOP");
 333   printf("*** START version 0 initialized ***\n");
 334
 335 }
 336
 337 //-------------------------------------------------------------------
 338
 339 void AliSTARTv1::StepManager()
 340 {
 341   //
 342   // Called for every step in the START Detector
 343   //
 344   Int_t id,copy,copy1;
 345   static Float_t hits[7];
 346   static Float_t edep;
 347   static Int_t vol[2];
 348   TLorentzVector pos;
 349
 350   TClonesArray &lhits = *fHits;
 351
 352   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 353   Float_t charge = gMC->TrackCharge();
 354   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 355   id=gMC->CurrentVolID(copy);
 356
 357
 358   //  printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
 359   // Check the sensetive volume
 360   if(id==fIdSens1 ) {
 361     if(gMC->IsTrackEntering()) {
 362       gMC->CurrentVolOffID(2,copy);
 363       vol[0]=copy;
 364       gMC->CurrentVolOffID(1,copy1);
 365       vol[1]=copy1;
 366       gMC->TrackPosition(pos);
 367       hits[0] = pos[0];
 368       hits[1] = pos[1];
 369       hits[2] = pos[2];
 370       Float_t etot=gMC->Etot();
 371       hits[4]=etot;
 372       Int_t part= gMC->TrackPid();
 373       hits[5]=part;
 374       Float_t ttime=gMC->TrackTime();
 375       hits[6]=ttime*1e9;
 376       edep=0;
 377     }
 378     if(gMC->IsTrackInside())    {
 379       Float_t de=gMC->Edep();
 380       edep=edep+de;
 381       //       printf ("E deposition %f\n",edep);
 382       //    for (i=0; i<=6; i++){
 383       //    printf(" HITS on START inside %f\n",hits[i]); }
 384     }
 385     if(gMC->IsTrackExiting())   {
 386       Float_t de=gMC->Edep();
 387       edep=edep+de;
 388       hits[3]=edep*1e3;
 389       Int_t i;
 390       for (i=0; i<=6; i++){
 391         printf(" HITS on START Exit %f\n",hits[i]); }
 392       for (i=0; i<=1; i++) { printf("START vol %d\n",vol[i]);}
 393
 394       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 395     }
 396   }
 397 //---------------------------------------------------------------------
 398 }
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