FMD/AliFMDv1.cxx

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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]= {3.40, 2.29, 3.68, 2.29, 5.09};
 103   Float_t etaout[6]={2.01, 1.70, 2.28, 1.70, 3.68};
 104   //  Float_t z[6]={64., 85., -64., -85., -270., -630};
 105   Float_t z[6]={62.8, 75.2, -83.4, -75.2, -340.};
 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         cout<<" !!!!!!!!!!!New FMD geometry !!!!!!!!!"<<endl;
 115
 116   AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
 117
 118   //  gMC->Gsvolu("GSI","TUBE", idtmed[1], par, 0);
 119   gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
 120   gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
 121
 122   for (ifmd =0; ifmd < 5; ifmd++){
 123
 124     sprintf(name,"FMD%d",ifmd+1);
 125     sprintf(nameSi,"GSI%d",ifmd+1);
 126     sprintf(nameSector,"GSC%d",ifmd+1);
 127     sprintf(nameRing,"GRN%d",ifmd+1);
 128     printf(name,nameSi);
 129
 130     zfmd=TMath::Abs(z[ifmd]);
 131     printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
 132     AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
 133     AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
 134
 135     par[0]=rin[ifmd]; // pipe size
 136     par[1]=rout[ifmd];
 137     par[2]=zFMD/2;
 138     gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
 139     //    par[2]=zDet/2;
 140     gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
 141
 142     printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
 143     if (z[ifmd] < 0){
 144       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
 145     else {
 146       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
 147   //Silicon detector
 148     par[2]=zDet/2;
 149     zpos=zFMD/2 -par[2];
 150     gMC->Gsposp(nameSi,ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 151     cout<<" Si "<<nameSi<<" ifmd "<<ifmd<<" rin "<<par[0]<<" rout "<<par[1]<<
 152       " zDet "<<par[2]<<endl;
 153     //Granularity
 154     cout<<"fSectorsSi1 "<<fSectorsSi1<<
 155       " fRingsSi1 "<<fRingsSi1<<
 156       " fSectorsSi2 "<<fSectorsSi2<<
 157       " fRingsSi2 "<<fRingsSi2<<endl;
 158    if(ifmd==1||ifmd==3)
 159       {
 160         gMC->Gsdvn(nameSector, nameSi , fSectorsSi2, 2);
 161         gMC->Gsdvn(nameRing, nameSector, fRingsSi2, 1);
 162       }
 163     else
 164       {
 165         gMC->Gsdvn(nameSector, nameSi , fSectorsSi1, 2);
 166         gMC->Gsdvn(nameRing, nameSector , fRingsSi1, 1);
 167       }
 168
 169     //Plastic slice for electronics
 170     par[2]=zElectronic/2;
 171     zpos=zpos-zDet/2-par[2];
 172     gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 173
 174    //Simple Al support
 175    par[1]=rout[ifmd];
 176    par[0]=rout[ifmd]-2;
 177    par[2]=zSupport/2;
 178    zpos=zpos-zElectronic/2-par[2];
 179    //   gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 180
 181
 182   }
 183
 184 }
 185
 186 //------------------------------------------------------------------------
 187 void AliFMDv1::CreateMaterials()
 188 {
 189  Int_t isxfld   = gAlice->Field()->Integ();
 190  Float_t sxmgmx = gAlice->Field()->Max();
 191
 192  // Plastic CH
 193  Float_t aPlastic[2]={1.01,12.01};
 194  Float_t zPlastic[2]={1,6};
 195  Float_t wPlastic[2]={1,1};
 196  Float_t denPlastic=1.03;
 197    //
 198
 199  //*** Definition Of avaible FMD materials ***
 200  AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
 201  AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
 202  AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
 203  AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
 204
 205
 206 //**
 207  AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 208  AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 209  AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 210  AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
 211
 212
 213
 214 }
 215 //---------------------------------------------------------------------
 216 void AliFMDv1::DrawDetector()
 217 {
 218 //
 219 // Draw a shaded view of the Forward multiplicity detector version 0
 220 //
 221
 222 AliMC* pMC = AliMC::GetMC();
 223
 224 //Set ALIC mother transparent
 225 pMC->Gsatt("ALIC","SEEN",0);
 226 //
 227 //Set volumes visible
 228 gMC->Gsatt("FMD1","SEEN",1);
 229 gMC->Gsatt("FMD2","SEEN",1);
 230 gMC->Gsatt("FMD3","SEEN",1);
 231 gMC->Gsatt("FMD4","SEEN",1);
 232 gMC->Gsatt("FMD5","SEEN",1);
 233
 234 //
 235 gMC->Gdopt("hide","on");
 236 gMC->Gdopt("shad","on");
 237 gMC->SetClipBox(".");
 238 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 239 gMC->DefaultRange();
 240 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 241 gMC->Gdhead(1111,"Forward multiplicity detector");
 242 gMC->Gdopt("hide","off");
 243 }
 244 //-------------------------------------------------------------------
 245 void AliFMDv1::Init()
 246 {
 247 // Initialises version 0 of the Forward Multiplicity Detector
 248 //
 249 AliMC* gMC=AliMC::GetMC();
 250 AliFMD::Init();
 251 fIdSens1=gMC->VolId("GRN1");
 252 fIdSens2=gMC->VolId("GRN2");
 253 fIdSens3=gMC->VolId("GRN3");
 254 fIdSens4=gMC->VolId("GRN4");
 255 fIdSens5=gMC->VolId("GRN5");
 256 printf("*** FMD version 1 initialized ***\n");
 257 }
 258
 259 //-------------------------------------------------------------------
 260
 261 void AliFMDv1::StepManager()
 262 {
 263   //
 264   // Called for every step in the Forward Multiplicity Detector
 265   //
 266   Int_t id,copy,copy1,copy2;
 267   static Float_t hits[9];
 268   static Int_t vol[3];
 269   static Float_t de;
 270   TLorentzVector pos;
 271   TLorentzVector mom;
 272
 273
 274   TClonesArray &lhits = *fHits;
 275   AliMC* gMC=AliMC::GetMC();
 276   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 277
 278   Float_t charge = gMC->TrackCharge();
 279   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 280
 281   //  printf(" in StepManeger \n");
 282   id=gMC->CurrentVolID(copy);
 283   //((TGeant3*)gMC)->Gpcxyz();
 284
 285 // Check the sensetive volume
 286    if(id==fIdSens1||id==fIdSens2||id==fIdSens3||id==fIdSens4||id==fIdSens5)
 287      {
 288        if(gMC->IsTrackEntering())
 289          {
 290            vol[2]=copy;
 291            gMC->CurrentVolOffID(1,copy1);
 292            vol[1]=copy1;
 293            gMC->CurrentVolOffID(2,copy2);
 294            vol[0]=copy2;
 295            //  printf("vol0 %d vol1 %d vol2 %d\n",vol[0],vol[1],vol[2]);
 296            gMC->TrackPosition(pos);
 297            hits[0]=pos[0];
 298            hits[1]=pos[1];
 299            hits[2]=pos[2];
 300            //      printf(" Zpos %f \n",hits[2]);
 301            gMC->TrackMomentum(mom);
 302            hits[3]=mom[0];
 303            hits[4]=mom[1];
 304            hits[5]=mom[2];
 305
 306            Int_t iPart= gMC->TrackPid();
 307            Int_t partId=gMC->IdFromPDG(iPart);
 308            hits[7]=partId;
 309            hits[8]=1e9*gMC->TrackTime();
 310            de=0.;
 311          }
 312        if(gMC->IsTrackInside()){
 313            de=de+1000.*gMC->Edep();
 314            //      cout<<" de "<<de<<endl;
 315            // cout<<" step "<<gMC->TrackStep()<<endl;
 316        }
 317
 318        if(gMC->IsTrackExiting()
 319           ||gMC->IsTrackDisappeared()||
 320           gMC->IsTrackStop())
 321          {
 322              hits[6]=de+1000.*gMC->Edep();
 323              //     cout<<" idSens "<<id<<endl;
 324              //cout<<" hits "<<hits[6]<<endl;
 325              //     for(Int_t i=0; i<9; i++) printf(" i %d hits %f \n",i,hits[i]);
 326       new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 327          } // IsTrackExiting()
 328      }
 329   }
 330 //--------------------------------------------------------------------------
 331
 332 void AliFMDv1::Response( Float_t Edep)
 333 {
 334   Float_t I=1.664*0.04*2.33/22400; // = 0.69e-6;
 335   Float_t chargeOnly=Edep/I;
 336   //Add noise ~500electrons
 337   Int_t charge=500;
 338   if (Edep>0)
 339      charge=Int_t(gRandom->Gaus(chargeOnly,500));
 340  }
 341
 342
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 346