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 1.11  2001/04/04 12:10:18  alla
  19 changes according Coding Convension
  20
  21 Revision 1.10  2000/12/04 08:48:19  alibrary
  22 Fixing problems in the HEAD
  23
  24 Revision 1.9  2000/10/02 21:28:13  fca
  25 Removal of useless dependecies via forward declarations
  26
  27 Revision 1.8  2000/07/13 16:41:29  fca
  28 New START corrected for coding conventions
  29
  30 Revision 1.7  2000/01/21 15:45:23  fca
  31 New Version from Alla
  32
  33 Revision 1.6  1999/11/12 15:04:00  fca
  34 Modifications from A.Maevskaya
  35
  36 Revision 1.5  1999/09/29 09:24:29  fca
  37 Introduction of the Copyright and cvs Log
  38
  39 */
  40
  41 /////////////////////////////////////////////////////////////////////
  42 //                                                                 //
  43 // START ( T-zero) detector  version 0                        //
  44 //
  45 //Begin Html
  46 /*
  47 <img src="gif/AliSTARTv0Class.gif">
  48 */
  49 //End Html
  50 //                                                                  //
  51 //                                                                  //
  52 //////////////////////////////////////////////////////////////////////
  53
  54 #include <TMath.h>
  55 #include <TGeometry.h>
  56 #include <TTUBE.h>
  57 #include <TNode.h>
  58 #include <TLorentzVector.h>
  59
  60 #include "AliSTARTv0.h"
  61 #include "AliRun.h"
  62 #include "AliMC.h"
  63 #include "AliMagF.h"
  64 #include "AliSTARThit.h"
  65
  66 #include <iostream.h>
  67 #include <fstream.h>
  68
  69 //#include "TGeant3.h"
  70 #include <stdlib.h>
  71
  72 ClassImp(AliSTARTv0)
  73
  74 //--------------------------------------------------------------------
  75 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
  76  AliSTART(name,title)
  77 {
  78   //
  79   // Standart constructor for START Detector version 0
  80   //
  81   fIdSens1=0;
  82 //  setBufferSize(128000);
  83 }
  84 //-------------------------------------------------------------------------
  85 void AliSTARTv0::CreateGeometry()
  86 {
  87   //
  88   // Create the geometry of START Detector version 0
  89   //
  90   // begin Html
  91   /*
  92    <img src="gif/AliSTARTv0.gif">
  93   */
  94   //
  95
  96
  97   Int_t *idtmed = fIdtmed->GetArray();
  98
  99   Int_t is;
 100   Int_t idrotm[999];
 101   Float_t x,y,z;
 102
 103   Float_t pstart[3]={4.5,10.7,5.3};
 104   Float_t ppmt[3]={0.,1.3,3.5};
 105   Float_t pdivider[3]={0.,1.2,1.75};
 106   Float_t pdiv2[3]={0.,1.2,1.25};
 107   Float_t pdiv1[3]={0.6,1.2,0.5};
 108   Float_t ptop[3]={0.,1.3,1.5};
 109   Float_t pbot[3]={0.6,1.2,0.1};
 110   Float_t pglass[3]={1.2,1.3,2.};
 111   Float_t pcer[3]={0.9,1.1,0.09};
 112   Float_t psteel[3]={0.9,1.1,0.01};
 113   Float_t ppins[3]={0.6,1.2,0.014};
 114   Float_t phole[3]={0.6,1.2,0.015};
 115   Float_t pknob[3]={0.5,0.6,0.4};
 116   Float_t pknob_vac[3]={0.,0.5,0.4};
 117   Float_t pknob_bot[3]={0.,0.6,0.05};
 118   Float_t pribber[3] = {0.,1.2,2.413/2.};
 119   Float_t presist[3] = {0.,1.2,0.087/2.};
 120
 121   Float_t zdet=75.;
 122  //-------------------------------------------------------------------
 123  //  START volume
 124  //-------------------------------------------------------------------
 125
 126     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 127     gMC->Gsvolu("0STA","TUBE",idtmed[1],pstart,3);
 128     gMC->Gspos("0STA",1,"ALIC",0.,0.,zdet,0,"ONLY");
 129     gMC->Gspos("0STA",2,"ALIC",0.,0.,-zdet,idrotm[901],"ONLY");
 130
 131 //START interior
 132     gMC->Gsvolu("0PMT","TUBE",idtmed[3],ppmt,3);
 133     gMC->Gsvolu("0DIV","TUBE",idtmed[3],pdivider,3);
 134
 135 // first ring: 12 units of Scintillator+PMT+divider
 136     Double_t dang1 = 2*TMath::Pi()/12;
 137     for (is=1; is<=12; is++)
 138       {
 139         x=6.5*TMath::Sin(is*dang1);
 140         y=6.5*TMath::Cos(is*dang1);
 141         z=-pstart[2]+ppmt[2];
 142         gMC->Gspos("0PMT",is,"0STA",x,y,z,0,"ONLY");
 143         printf("z PMT %f\n",z);
 144         z=z+ppmt[2]+pdiv2[2];
 145         printf(" is %d, z Divider %f\n",is,z);
 146         gMC->Gspos("0DIV",is,"0STA",x,y,z,0,"ONLY");
 147       }
 148      /*
 149 //second ring: 20 units of Scintillator+PMT+divider
 150       Double_t dang2 = 2*TMath::Pi()/26;
 151       Double_t dang3 = 2*TMath::Pi()/20;
 152        for (is=14; is<=33;is++)
 153      {
 154      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
 155      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
 156       z=-pstart[2]+ppmt[2];
 157       gMC->Gspos("0PMT",is,"0ST",x,y,z,0,"ONLY");
 158       z=z+ppmt[2]+pdiv2[2];
 159       gMC->Gspos("0DI",is,"0ST",x,y,z,0,"ONLY");
 160       }
 161      */
 162 // PMT
 163
 164     // Entry window (glass)
 165     gMC->Gsvolu("0TOP","TUBE",idtmed[6],ptop,3);
 166     z=-ppmt[2]+ptop[2];
 167     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 168     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 169     // Bottom glass
 170     gMC->Gsvolu("0BO","TUBE",idtmed[6],pbot,3);
 171     z=ppmt[2]-pbot[2];
 172     printf("Z bottom %f\n",z);
 173     gMC->Gspos("0BO",1,"0PMT",0,0,z,0,"ONLY");
 174     // Side cylinder glass
 175     gMC->Gsvolu("0UO","TUBE",idtmed[6],pglass,3);
 176     z=ppmt[2]-pglass[2];
 177     //      printf("Z glass %f\n",z);
 178     gMC->Gspos("0UO",1,"0PMT",0,0,z,0,"ONLY");
 179     //PMT electrodes support structure
 180     gMC->Gsvolu("0CE","TUBE",idtmed[4],pcer,3);
 181     gMC->Gsvolu("0IR","TUBE",idtmed[8],psteel,3);
 182     z=-ppmt[2]+2*ptop[2]+0.3;;
 183     //      printf("Z Cer 1 %f\n",z);
 184     for (is=1; is<=15; is++)
 185       {
 186         z=z+psteel[2]+pcer[2];
 187         gMC->Gspos("0CE",is,"0PMT",0,0,z,0,"ONLY");
 188         z=z+psteel[2]+pcer[2];
 189         gMC->Gspos("0IR",is,"0PMT",0,0,z,0,"ONLY");
 190       }
 191
 192     // Divider
 193     // Knob at the bottom of PMT baloon
 194
 195     gMC->Gsvolu("0OB","TUBE",idtmed[6],pknob,3);
 196     z=-pdivider[2]+pknob[2];
 197     //      printf("zknob %f\n",z);
 198     gMC->Gspos("0OB",1,"0DIV",0,0,z,0,"ONLY");
 199     gMC->Gsvolu("0KB","TUBE",idtmed[6],pknob_bot,3);
 200     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 201     //      printf("knobbot %f\n",z);
 202     gMC->Gspos("0KB",1,"0DIV",0,0,z,0,"ONLY");
 203     gMC->Gsvolu("0VA","TUBE",idtmed[6],pknob_vac,3);
 204     z=-pdivider[2]+pknob_vac[2];
 205     //      printf("knobvac %f\n",z);
 206     gMC->Gspos("0VA",1,"0DIV",0,0,z,0,"ONLY");
 207     //Steel pins + pin holes
 208     gMC->Gsvolu("0PI","TUBE",idtmed[8],ppins,3);
 209     z=-pdivider[2]+ppins[2];
 210     gMC->Gspos("0PI",1,"0DIV",0,0,z,0,"ONLY");
 211     gMC->Gsvolu("0HO","TUBE",idtmed[11],phole,3);
 212     z=-pdivider[2]+2*ppins[2]+phole[2];
 213     gMC->Gspos("0HO",1,"0DIV",0,0,z,0,"ONLY");
 214
 215     //Socket
 216     gMC->Gsvolu("0V1","TUBE",idtmed[4],pdiv1,3);
 217     z=-pdivider[2]+pdiv1[2];
 218     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 219     //Resistors
 220     gMC->Gsvolu("0V2","TUBE",idtmed[1],pdiv2,3);
 221     z=pdivider[2]-pdiv2[2];
 222     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 223     gMC->Gsvolu("0DR","TUBE",idtmed[4],presist,3);
 224     z=-pdiv2[2]+presist[2];
 225     gMC->Gspos("0DR",1,"0V2",0,0,z,0,"ONLY");
 226     gMC->Gsvolu("0RB","TUBE",idtmed[9],pribber,3);
 227     z=pdiv2[2]-pribber[2];
 228     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 229     //      printf("z DRIB %f\n",z);
 230
 231
 232 }
 233 //------------------------------------------------------------------------
 234 void AliSTARTv0::CreateMaterials()
 235 {
 236    Int_t isxfld   = gAlice->Field()->Integ();
 237    Float_t sxmgmx = gAlice->Field()->Max();
 238    Float_t a,z,d,radl,absl,buf[1];
 239    Int_t nbuf;
 240
 241 // Scintillator CH
 242    Float_t ascin[2]={1.01,12.01};
 243    Float_t zscin[2]={1,6};
 244    Float_t wscin[2]={1,1};
 245    Float_t denscin=1.03;
 246 // PMT glass SiO2
 247    Float_t aglass[2]={28.0855,15.9994};
 248    Float_t zglass[2]={14.,8.};
 249    Float_t wglass[2]={1.,2.};
 250    Float_t dglass=2.65;
 251 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 252    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 253    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 254    Float_t zal2o3[2]  = { 13.,8. };
 255    Float_t wal2o3[2]  = { 2.,3. };
 256    Float_t denscer  = 3.6;
 257
 258 // Brass 80% Cu, 20% Zn
 259    Float_t abrass[2] = {63.546,65.39};
 260    Float_t zbrass[2] = {29,30};
 261    Float_t wbrass[2] = {0.8,0.2};
 262    Float_t denbrass=8.96;
 263
 264 //Ribber C6H12S
 265    Float_t aribber[3] = {12.,1.,32.};
 266    Float_t zribber[3] = {6.,1.,16.};
 267    Float_t wribber[3] = {6.,12.,1.};
 268    Float_t denribber=0.8;
 269    /*
 270 // Definition Cherenkov parameters
 271    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 };
 272    Float_t rindex_quarz[14] = { 1.528309,1.533333,
 273                                 1.538243,1.544223,1.550568,1.55777,
 274                                 1.565463,1.574765,1.584831,1.597027,
 275                                 1.611858,1.6277,1.6472,1.6724 };
 276
 277    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
 278                                 6.324,4.483,1.6,.323,.073,0. };
 279    */
 280    //   Int_t *idtmed = fIdtmed->GetArray()-999;
 281
 282    //  TGeant3 *geant3 = (TGeant3*) gMC;
 283
 284 //*** Definition Of avaible START materials ***
 285    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 286    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 287    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 288
 289    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 290    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 291    char namate[21];
 292    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 293    acer[0]=a;
 294    zcer[0]=z;
 295    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 296    acer[1]=a;
 297    zcer[1]=z;
 298
 299    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 300    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 301    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 302
 303    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 304
 305
 306    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 307    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 308    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 309    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 310    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 311    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 312    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 313    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 314
 315 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 316
 317 }
 318 //---------------------------------------------------------------------
 319 void AliSTARTv0::DrawModule()
 320 {
 321 //
 322 // Draw a shaded view of the Forward multiplicity detector version 0
 323 //
 324
 325   //Set ALIC mother transparent
 326   gMC->Gsatt("ALIC","SEEN",0);
 327   //
 328   //Set volumes visible
 329   gMC->Gsatt("0STA","SEEN",0);
 330   gMC->Gsatt("0PMT","SEEN",1);
 331   gMC->Gsatt("0DIV","SEEN",1);
 332   //
 333   gMC->Gdopt("hide","on");
 334   gMC->Gdopt("shad","on");
 335   gMC->SetClipBox(".");
 336   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 337   gMC->DefaultRange();
 338   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
 339   gMC->Gdhead(1111,"T-Zero detector");
 340   gMC->Gdopt("hide","off");
 341 }
 342
 343 //-------------------------------------------------------------------
 344 void AliSTARTv0::Init()
 345 {
 346 // Initialises version 0 of the Forward Multiplicity Detector
 347 //
 348 //Int_t *idtmed  = gAlice->Idtmed();
 349   AliSTART::Init();
 350   fIdSens1=gMC->VolId("0TOP");
 351   printf("*** START version 0 initialized ***\n");
 352
 353 }
 354
 355 //-------------------------------------------------------------------
 356
 357 void AliSTARTv0::StepManager()
 358 {
 359   //
 360   // Called for every step in the START Detector
 361   //
 362   Int_t id,copy,copy1;
 363   static Float_t hits[7];
 364   static Float_t edep;
 365   static Int_t vol[2];
 366   TLorentzVector pos;
 367
 368   TClonesArray &lhits = *fHits;
 369
 370   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 371   Float_t charge = gMC->TrackCharge();
 372   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 373   //    gMC->Gpcxyz();
 374   id=gMC->CurrentVolID(copy);
 375
 376
 377   //  printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
 378   // Check the sensetive volume
 379   if(id==fIdSens1 ) {
 380     if(gMC->IsTrackEntering()) {
 381       gMC->CurrentVolOffID(2,copy);
 382       vol[0]=copy;
 383       gMC->CurrentVolOffID(1,copy1);
 384       vol[1]=copy1;
 385       gMC->TrackPosition(pos);
 386       hits[0] = pos[0];
 387       hits[1] = pos[1];
 388       hits[2] = pos[2];
 389       Float_t etot=gMC->Etot();
 390       hits[4]=etot;
 391       Int_t part= gMC->TrackPid();
 392       hits[5]=part;
 393       Float_t ttime=gMC->TrackTime();
 394       hits[6]=ttime*1e9;
 395       edep=0;
 396     }
 397     if(gMC->IsTrackInside())    {
 398       Float_t de=gMC->Edep();
 399       edep=edep+de;
 400       //       printf ("E deposition %f\n",edep);
 401       //    for (i=0; i<=6; i++){
 402       //    printf(" HITS on START inside %f\n",hits[i]); }
 403     }
 404     if(gMC->IsTrackExiting())   {
 405       Float_t de=gMC->Edep();
 406       edep=edep+de;
 407       hits[3]=edep*1e3;
 408
 409       //       for (i=0; i<=6; i++){
 410       //         printf(" HITS on START Exit %f\n",hits[i]); }
 411       //for (i=0; i<=1; i++) { printf("START vol %d\n",vol[i]);}
 412
 413       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 414     }
 415   }
 416 //---------------------------------------------------------------------
 417 }
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