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 <Riostream.h>
  41 #include "AliMagF.h"
  42 #include "AliFMDhit.h"
  43 #include "AliFMDdigit.h"
  44 #include <stdlib.h>
  45 //#include "TGeant3.h"
  46 //class TGeant3;
  47 ClassImp(AliFMDv1)
  48
  49 //--------------------------------------------------------------------
  50 AliFMDv1::AliFMDv1(const char *name, const char *title):
  51  AliFMD(name,title)
  52 {
  53   //
  54   // Standart constructor for Forward Multiplicity Detector version 0
  55   //
  56   fIdSens1=0;
  57   fIdSens2=0;
  58   fIdSens3=0;
  59   fIdSens4=0;
  60   fIdSens5=0;
  61 //  setBufferSize(128000);
  62 }
  63 //-------------------------------------------------------------------------
  64 void AliFMDv1::CreateGeometry()
  65 {
  66  //
  67   // Create the geometry of Forward Multiplicity Detector version 0
  68   //
  69   //Detector consists of 6 volumes:
  70   // 1st covered pseudorapidity interval from 3.3 to 2.0
  71   // and placed on 65cm in Z-direction;
  72   // 2nd - from 2.0 to 1.6 and Z=85 cm;
  73   // 3d  - the same pseudorapidity interval as the 1st
  74   // but on the other side from the interaction point z=-65cm;
  75   // 4th - simmetricaly with the 2nd :
  76   // pseudorapidity from 2.0 to 1.6, Z=-85cm
  77   // 5th - from 3.6 to 4.7, Z=-270cm
  78   // 6th - from 4.5 to 5.5 , Z=-630cm.
  79   // Each part has 400mkm Si (sensetive area, detector itself),
  80   // 0.75cm of plastic simulated electronics material,
  81   // Al support ring 2cm thickness and 1cm width placed on
  82   // the outer radius of each Si disk;
  83   //
  84   // begin Html
  85   /*
  86    <img src="gif/AliFMDv0.gif">
  87    */
  88   //
  89
  90
  91   Int_t *idtmed = fIdtmed->GetArray();
  92
  93   Int_t ifmd;
  94   Int_t idrotm[999];
  95   Float_t zfmd,par[3];
  96   char name[5], nameSi[5], nameSector[5], nameRing[5];
  97
  98   Float_t rin[6], rout[6],zpos;
  99
 100   Float_t etain[5]= {3.40, 2.29, 3.68, 2.29, 5.09};
 101   Float_t etaout[6]={2.01, 1.70, 2.28, 1.70, 3.68};
 102   //  Float_t z[6]={64., 85., -64., -85., -270., -630};
 103   Float_t z[6]={62.8, 75.2, -83.4, -75.2, -340.};
 104   Float_t zDet=0.03;
 105   Float_t zElectronic=0.1;
 106   Float_t zSupport=1.;
 107
 108   Float_t zFMD=1.;
 109 //-------------------------------------------------------------------
 110  //  FMD
 111  //------------------------------------------------------------------
 112         cout<<" !!!!!!!!!!!New FMD geometry !!!!!!!!!"<<endl;
 113
 114   AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
 115
 116   //  gMC->Gsvolu("GSI","TUBE", idtmed[1], par, 0);
 117   gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
 118   gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
 119
 120   for (ifmd =0; ifmd < 5; ifmd++){
 121
 122     sprintf(name,"FMD%d",ifmd+1);
 123     sprintf(nameSi,"GSI%d",ifmd+1);
 124     sprintf(nameSector,"GSC%d",ifmd+1);
 125     sprintf(nameRing,"GRN%d",ifmd+1);
 126
 127     zfmd=TMath::Abs(z[ifmd]);
 128
 129     AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
 130     AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
 131
 132     par[0]=rin[ifmd]; // pipe size
 133     par[1]=rout[ifmd];
 134     par[2]=zFMD/2;
 135     gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
 136     gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
 137
 138     if (z[ifmd] < 0){
 139       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
 140     else {
 141       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
 142   //Silicon detector
 143     par[2]=zDet/2;
 144     zpos=zFMD/2 -par[2];
 145     gMC->Gsposp(nameSi,ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 146
 147     //Granularity
 148     fSectorsSi1=20;
 149     fRingsSi1=256;
 150     fSectorsSi2=40;
 151     fRingsSi2=128;
 152    if(ifmd==1||ifmd==3)
 153       {
 154         gMC->Gsdvn(nameSector, nameSi , fSectorsSi2, 2);
 155         gMC->Gsdvn(nameRing, nameSector, fRingsSi2, 1);
 156       }
 157     else
 158       {
 159         gMC->Gsdvn(nameSector, nameSi , fSectorsSi1, 2);
 160         gMC->Gsdvn(nameRing, nameSector , fRingsSi1, 1);
 161       }
 162
 163     //Plastic slice for electronics
 164     par[2]=zElectronic/2;
 165     zpos=zpos-zDet/2-par[2];
 166     gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 167
 168    //Simple Al support
 169    par[1]=rout[ifmd];
 170    par[0]=rout[ifmd]-2;
 171    par[2]=zSupport/2;
 172    zpos=zpos-zElectronic/2-par[2];
 173    //   gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 174
 175
 176   }
 177
 178 }
 179
 180 //------------------------------------------------------------------------
 181 void AliFMDv1::CreateMaterials()
 182 {
 183  Int_t isxfld   = gAlice->Field()->Integ();
 184  Float_t sxmgmx = gAlice->Field()->Max();
 185
 186  // Plastic CH
 187  Float_t aPlastic[2]={1.01,12.01};
 188  Float_t zPlastic[2]={1,6};
 189  Float_t wPlastic[2]={1,1};
 190  Float_t denPlastic=1.03;
 191    //
 192
 193  //*** Definition Of avaible FMD materials ***
 194  AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
 195  AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
 196  AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
 197  AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
 198
 199
 200 //**
 201  AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 202  AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 203  AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 204  AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
 205
 206
 207
 208 }
 209 //---------------------------------------------------------------------
 210 void AliFMDv1::DrawDetector()
 211 {
 212 //
 213 // Draw a shaded view of the Forward multiplicity detector version 0
 214 //
 215
 216
 217 //Set ALIC mother transparent
 218 gMC->Gsatt("ALIC","SEEN",0);
 219 //
 220 //Set volumes visible
 221 gMC->Gsatt("FMD1","SEEN",1);
 222 gMC->Gsatt("FMD2","SEEN",1);
 223 gMC->Gsatt("FMD3","SEEN",1);
 224 gMC->Gsatt("FMD4","SEEN",1);
 225 gMC->Gsatt("FMD5","SEEN",1);
 226
 227 //
 228 gMC->Gdopt("hide","on");
 229 gMC->Gdopt("shad","on");
 230 gMC->SetClipBox(".");
 231 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 232 gMC->DefaultRange();
 233 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 234 gMC->Gdhead(1111,"Forward multiplicity detector");
 235 gMC->Gdopt("hide","off");
 236 }
 237 //-------------------------------------------------------------------
 238 void AliFMDv1::Init()
 239 {
 240 // Initialises version 0 of the Forward Multiplicity Detector
 241 //
 242 AliFMD::Init();
 243 fIdSens1=gMC->VolId("GRN1");
 244 fIdSens2=gMC->VolId("GRN2");
 245 fIdSens3=gMC->VolId("GRN3");
 246 fIdSens4=gMC->VolId("GRN4");
 247 fIdSens5=gMC->VolId("GRN5");
 248 printf("*** FMD version 1 initialized ***\n");
 249 }
 250
 251 //-------------------------------------------------------------------
 252
 253 void AliFMDv1::StepManager()
 254 {
 255   //
 256   // Called for every step in the Forward Multiplicity Detector
 257   //
 258   Int_t id,copy,copy1,copy2;
 259   static Float_t hits[9];
 260   static Int_t vol[3];
 261   static Float_t de;
 262   TLorentzVector pos;
 263   TLorentzVector mom;
 264
 265
 266   TClonesArray &lhits = *fHits;
 267   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 268
 269   Float_t charge = gMC->TrackCharge();
 270   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 271
 272   //  printf(" in StepManeger \n");
 273   id=gMC->CurrentVolID(copy);
 274   //((TGeant3*)gMC)->Gpcxyz();
 275
 276 // Check the sensetive volume
 277    if(id==fIdSens1||id==fIdSens2||id==fIdSens3||id==fIdSens4||id==fIdSens5)
 278      {
 279        if(gMC->IsTrackEntering())
 280          {
 281            vol[2]=copy;
 282            gMC->CurrentVolOffID(1,copy1);
 283            vol[1]=copy1;
 284            gMC->CurrentVolOffID(2,copy2);
 285            vol[0]=copy2;
 286
 287            gMC->TrackPosition(pos);
 288            hits[0]=pos[0];
 289            hits[1]=pos[1];
 290            hits[2]=pos[2];
 291
 292            gMC->TrackMomentum(mom);
 293            hits[3]=mom[0];
 294            hits[4]=mom[1];
 295            hits[5]=mom[2];
 296
 297            Int_t iPart= gMC->TrackPid();
 298            Int_t partId=gMC->IdFromPDG(iPart);
 299            hits[7]=partId;
 300            hits[8]=1e9*gMC->TrackTime();
 301            de=0.;
 302          }
 303        if(gMC->IsTrackInside()){
 304            de=de+1000.*gMC->Edep();
 305        }
 306
 307        if(gMC->IsTrackExiting()
 308           ||gMC->IsTrackDisappeared()||
 309           gMC->IsTrackStop())
 310          {
 311              hits[6]=de+1000.*gMC->Edep();
 312       new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 313          } // IsTrackExiting()
 314      }
 315   }
 316 //--------------------------------------------------------------------------
 317
 318 void AliFMDv1::Response( Float_t Edep)
 319 {
 320   Float_t I=1.664*0.04*2.33/22400; // = 0.69e-6;
 321   Float_t chargeOnly=Edep/I;
 322   //Add noise ~500electrons
 323   Int_t charge=500;
 324   if (Edep>0)
 325      charge=Int_t(gRandom->Gaus(chargeOnly,500));
 326  }
 327
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 332