FMD/AliFMDv1.cxx

   1 /**************************************************************************
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   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  15  /////////////////////////////////////////////////////////////////////
  16 //                                                                 //
  17 // Forward Multiplicity detector based on Silicon version 0        //
  18 //
  19 //Begin Html
  20 /*
  21 <img src="gif/AliFMDv0Class.gif">
  22 */
  23 //End Html
  24 //                                                                  //
  25 //                                                                  //
  26 //////////////////////////////////////////////////////////////////////
  27
  28 #include <TMath.h>
  29 #include <TGeometry.h>
  30 #include <TTUBE.h>
  31 #include <TFile.h>
  32 #include <TTree.h>
  33 #include <TNode.h>
  34 #include <TClonesArray.h>
  35 #include <TLorentzVector.h>
  36 #include <TDirectory.h>
  37 #include "AliFMDv1.h"
  38 #include "AliFMDv0.h"
  39 #include "AliRun.h"
  40 #include "AliMC.h"
  41 #include <iostream.h>
  42 #include <fstream.h>
  43 #include "AliMagF.h"
  44 #include "AliFMDhit.h"
  45 #include "AliFMDdigit.h"
  46 #include <stdlib.h>
  47 //#include "TGeant3.h"
  48 //class TGeant3;
  49 ClassImp(AliFMDv1)
  50
  51 //--------------------------------------------------------------------
  52 AliFMDv1::AliFMDv1(const char *name, const char *title):
  53  AliFMD(name,title)
  54 {
  55   //
  56   // Standart constructor for Forward Multiplicity Detector version 0
  57   //
  58   fIdSens1=0;
  59   fIdSens2=0;
  60   fIdSens3=0;
  61   fIdSens4=0;
  62   fIdSens5=0;
  63 //  setBufferSize(128000);
  64 }
  65 //-------------------------------------------------------------------------
  66 void AliFMDv1::CreateGeometry()
  67 {
  68  //
  69   // Create the geometry of Forward Multiplicity Detector version 0
  70   //
  71   //Detector consists of 6 volumes:
  72   // 1st covered pseudorapidity interval from 3.3 to 2.0
  73   // and placed on 65cm in Z-direction;
  74   // 2nd - from 2.0 to 1.6 and Z=85 cm;
  75   // 3d  - the same pseudorapidity interval as the 1st
  76   // but on the other side from the interaction point z=-65cm;
  77   // 4th - simmetricaly with the 2nd :
  78   // pseudorapidity from 2.0 to 1.6, Z=-85cm
  79   // 5th - from 3.6 to 4.7, Z=-270cm
  80   // 6th - from 4.5 to 5.5 , Z=-630cm.
  81   // Each part has 400mkm Si (sensetive area, detector itself),
  82   // 0.75cm of plastic simulated electronics material,
  83   // Al support ring 2cm thickness and 1cm width placed on
  84   // the outer radius of each Si disk;
  85   //
  86   // begin Html
  87   /*
  88    <img src="gif/AliFMDv0.gif">
  89    */
  90   //
  91
  92
  93   Int_t *idtmed = fIdtmed->GetArray();
  94
  95   Int_t ifmd;
  96   Int_t idrotm[999];
  97   Float_t zfmd,par[3];
  98   char name[5], nameSi[5], nameSector[5], nameRing[5];
  99
 100   Float_t rin[6], rout[6],zpos;
 101
 102   Float_t etain[5]= {3.58, 1.94, 3.58, 1.94, 5.28};
 103   Float_t etaout[6]={2.03, 1.51, 2.03, 1.51, 3.71};
 104   //  Float_t z[6]={64., 85., -64., -85., -270., -630};
 105   Float_t z[6]={62.8, 75.2, -62.8, -75.2, -345.};
 106   Float_t zDet=0.03;
 107   Float_t zElectronic=0.1;
 108   Float_t zSupport=1.;
 109
 110   Float_t zFMD=1.;
 111 //-------------------------------------------------------------------
 112  //  FMD
 113  //------------------------------------------------------------------
 114
 115   AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
 116
 117   //  gMC->Gsvolu("GSI","TUBE", idtmed[1], par, 0);
 118   gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
 119   gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
 120
 121   for (ifmd =0; ifmd < 5; ifmd++){
 122
 123     sprintf(name,"FMD%d",ifmd+1);
 124     sprintf(nameSi,"GSI%d",ifmd+1);
 125     sprintf(nameSector,"GSC%d",ifmd+1);
 126     sprintf(nameRing,"GRN%d",ifmd+1);
 127     printf(name,nameSi);
 128
 129     zfmd=TMath::Abs(z[ifmd]);
 130     printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
 131     AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
 132     AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
 133
 134     par[0]=rin[ifmd]; // pipe size
 135     par[1]=rout[ifmd];
 136     par[2]=zFMD/2;
 137     gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
 138     //    par[2]=zDet/2;
 139     gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
 140
 141     printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
 142     if (z[ifmd] < 0){
 143       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
 144     else {
 145       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
 146   //Silicon detector
 147     par[2]=zDet/2;
 148     zpos=zFMD/2 -par[2];
 149     gMC->Gsposp(nameSi,ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 150     cout<<" Si "<<nameSi<<" ifmd "<<ifmd<<" rin "<<par[0]<<" rout "<<par[1]<<
 151       " zDet "<<par[2]<<endl;
 152     //Granularity
 153     cout<<"fSectorsSi1 "<<fSectorsSi1<<
 154       " fRingsSi1 "<<fRingsSi1<<
 155       " fSectorsSi2 "<<fSectorsSi2<<
 156       " fRingsSi2 "<<fRingsSi2<<endl;
 157    if(ifmd==1||ifmd==3)
 158       {
 159         gMC->Gsdvn(nameSector, nameSi , fSectorsSi2, 2);
 160         gMC->Gsdvn(nameRing, nameSector, fRingsSi2, 1);
 161       }
 162     else
 163       {
 164         gMC->Gsdvn(nameSector, nameSi , fSectorsSi1, 2);
 165         gMC->Gsdvn(nameRing, nameSector , fRingsSi1, 1);
 166       }
 167
 168     //Plastic slice for electronics
 169     par[2]=zElectronic/2;
 170     zpos=zpos-zDet/2-par[2];
 171     gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 172
 173    //Simple Al support
 174    par[1]=rout[ifmd];
 175    par[0]=rout[ifmd]-2;
 176    par[2]=zSupport/2;
 177    zpos=zpos-zElectronic/2-par[2];
 178    //   gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 179
 180
 181   }
 182
 183 }
 184
 185 //------------------------------------------------------------------------
 186 void AliFMDv1::CreateMaterials()
 187 {
 188  Int_t isxfld   = gAlice->Field()->Integ();
 189  Float_t sxmgmx = gAlice->Field()->Max();
 190
 191  // Plastic CH
 192  Float_t aPlastic[2]={1.01,12.01};
 193  Float_t zPlastic[2]={1,6};
 194  Float_t wPlastic[2]={1,1};
 195  Float_t denPlastic=1.03;
 196    //
 197
 198  //*** Definition Of avaible FMD materials ***
 199  AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
 200  AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
 201  AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
 202  AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
 203
 204
 205 //**
 206  AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 207  AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 208  AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 209  AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
 210
 211
 212
 213 }
 214 //---------------------------------------------------------------------
 215 void AliFMDv1::DrawDetector()
 216 {
 217 //
 218 // Draw a shaded view of the Forward multiplicity detector version 0
 219 //
 220
 221 AliMC* pMC = AliMC::GetMC();
 222
 223 //Set ALIC mother transparent
 224 pMC->Gsatt("ALIC","SEEN",0);
 225 //
 226 //Set volumes visible
 227 gMC->Gsatt("FMD1","SEEN",1);
 228 gMC->Gsatt("FMD2","SEEN",1);
 229 gMC->Gsatt("FMD3","SEEN",1);
 230 gMC->Gsatt("FMD4","SEEN",1);
 231 gMC->Gsatt("FMD5","SEEN",1);
 232
 233 //
 234 gMC->Gdopt("hide","on");
 235 gMC->Gdopt("shad","on");
 236 gMC->SetClipBox(".");
 237 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 238 gMC->DefaultRange();
 239 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 240 gMC->Gdhead(1111,"Forward multiplicity detector");
 241 gMC->Gdopt("hide","off");
 242 }
 243 //-------------------------------------------------------------------
 244 void AliFMDv1::Init()
 245 {
 246 // Initialises version 0 of the Forward Multiplicity Detector
 247 //
 248 AliMC* gMC=AliMC::GetMC();
 249 AliFMD::Init();
 250 fIdSens1=gMC->VolId("GRN1");
 251 fIdSens2=gMC->VolId("GRN2");
 252 fIdSens3=gMC->VolId("GRN3");
 253 fIdSens4=gMC->VolId("GRN4");
 254 fIdSens5=gMC->VolId("GRN5");
 255 printf("*** FMD version 1 initialized ***\n");
 256 }
 257
 258 //-------------------------------------------------------------------
 259
 260 void AliFMDv1::StepManager()
 261 {
 262   //
 263   // Called for every step in the Forward Multiplicity Detector
 264   //
 265   Int_t id,copy,copy1,copy2;
 266   static Float_t hits[9];
 267   static Int_t vol[3];
 268   static Float_t de;
 269   TLorentzVector pos;
 270   TLorentzVector mom;
 271
 272
 273   TClonesArray &lhits = *fHits;
 274   AliMC* gMC=AliMC::GetMC();
 275   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 276
 277   Float_t charge = gMC->TrackCharge();
 278   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 279
 280   //  printf(" in StepManeger \n");
 281   id=gMC->CurrentVolID(copy);
 282   //((TGeant3*)gMC)->Gpcxyz();
 283
 284 // Check the sensetive volume
 285    if(id==fIdSens1||id==fIdSens2||id==fIdSens3||id==fIdSens4||id==fIdSens5)
 286      {
 287        if(gMC->IsTrackEntering())
 288          {
 289            vol[2]=copy;
 290            gMC->CurrentVolOffID(1,copy1);
 291            vol[1]=copy1;
 292            gMC->CurrentVolOffID(2,copy2);
 293            vol[0]=copy2;
 294            //  printf("vol0 %d vol1 %d vol2 %d\n",vol[0],vol[1],vol[2]);
 295            gMC->TrackPosition(pos);
 296            hits[0]=pos[0];
 297            hits[1]=pos[1];
 298            hits[2]=pos[2];
 299            //      printf(" Zpos %f \n",hits[2]);
 300            gMC->TrackMomentum(mom);
 301            hits[3]=mom[0];
 302            hits[4]=mom[1];
 303            hits[5]=mom[2];
 304
 305            Int_t iPart= gMC->TrackPid();
 306            Int_t partId=gMC->IdFromPDG(iPart);
 307            hits[7]=partId;
 308            hits[8]=1e9*gMC->TrackTime();
 309            de=0.;
 310          }
 311        if(gMC->IsTrackInside()){
 312            de=de+1000.*gMC->Edep();
 313            //      cout<<" de "<<de<<endl;
 314            // cout<<" step "<<gMC->TrackStep()<<endl;
 315        }
 316
 317        if(gMC->IsTrackExiting()
 318           ||gMC->IsTrackDisappeared()||
 319           gMC->IsTrackStop())
 320          {
 321              hits[6]=de+1000.*gMC->Edep();
 322              //     cout<<" idSens "<<id<<endl;
 323              //cout<<" hits "<<hits[6]<<endl;
 324              //     for(Int_t i=0; i<9; i++) printf(" i %d hits %f \n",i,hits[i]);
 325       new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 326          } // IsTrackExiting()
 327      }
 328   }
 329 //--------------------------------------------------------------------------
 330
 331 void AliFMDv1::Response( Float_t Edep)
 332 {
 333   Float_t I=1.664*0.04*2.33/22400; // = 0.69e-6;
 334   Float_t chargeOnly=Edep/I;
 335   //Add noise ~500electrons
 336   Int_t charge=500;
 337   if (Edep>0)
 338      charge=Int_t(gRandom->Gaus(chargeOnly,500));
 339  }
 340
 341
 342
 343
 344
 345