FMD/AliFMDv1.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  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 // 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 <Riostream.h>
  42 #include <Riostream.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
 129     zfmd=TMath::Abs(z[ifmd]);
 130
 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     gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
 139
 140     if (z[ifmd] < 0){
 141       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
 142     else {
 143       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
 144   //Silicon detector
 145     par[2]=zDet/2;
 146     zpos=zFMD/2 -par[2];
 147     gMC->Gsposp(nameSi,ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 148
 149     //Granularity
 150     fSectorsSi1=20;
 151     fRingsSi1=256;
 152     fSectorsSi2=40;
 153     fRingsSi2=128;
 154    if(ifmd==1||ifmd==3)
 155       {
 156         gMC->Gsdvn(nameSector, nameSi , fSectorsSi2, 2);
 157         gMC->Gsdvn(nameRing, nameSector, fRingsSi2, 1);
 158       }
 159     else
 160       {
 161         gMC->Gsdvn(nameSector, nameSi , fSectorsSi1, 2);
 162         gMC->Gsdvn(nameRing, nameSector , fRingsSi1, 1);
 163       }
 164
 165     //Plastic slice for electronics
 166     par[2]=zElectronic/2;
 167     zpos=zpos-zDet/2-par[2];
 168     gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 169
 170    //Simple Al support
 171    par[1]=rout[ifmd];
 172    par[0]=rout[ifmd]-2;
 173    par[2]=zSupport/2;
 174    zpos=zpos-zElectronic/2-par[2];
 175    //   gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 176
 177
 178   }
 179
 180 }
 181
 182 //------------------------------------------------------------------------
 183 void AliFMDv1::CreateMaterials()
 184 {
 185  Int_t isxfld   = gAlice->Field()->Integ();
 186  Float_t sxmgmx = gAlice->Field()->Max();
 187
 188  // Plastic CH
 189  Float_t aPlastic[2]={1.01,12.01};
 190  Float_t zPlastic[2]={1,6};
 191  Float_t wPlastic[2]={1,1};
 192  Float_t denPlastic=1.03;
 193    //
 194
 195  //*** Definition Of avaible FMD materials ***
 196  AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
 197  AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
 198  AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
 199  AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
 200
 201
 202 //**
 203  AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 204  AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 205  AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 206  AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
 207
 208
 209
 210 }
 211 //---------------------------------------------------------------------
 212 void AliFMDv1::DrawDetector()
 213 {
 214 //
 215 // Draw a shaded view of the Forward multiplicity detector version 0
 216 //
 217
 218 AliMC* pMC = AliMC::GetMC();
 219
 220 //Set ALIC mother transparent
 221 pMC->Gsatt("ALIC","SEEN",0);
 222 //
 223 //Set volumes visible
 224 gMC->Gsatt("FMD1","SEEN",1);
 225 gMC->Gsatt("FMD2","SEEN",1);
 226 gMC->Gsatt("FMD3","SEEN",1);
 227 gMC->Gsatt("FMD4","SEEN",1);
 228 gMC->Gsatt("FMD5","SEEN",1);
 229
 230 //
 231 gMC->Gdopt("hide","on");
 232 gMC->Gdopt("shad","on");
 233 gMC->SetClipBox(".");
 234 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 235 gMC->DefaultRange();
 236 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 237 gMC->Gdhead(1111,"Forward multiplicity detector");
 238 gMC->Gdopt("hide","off");
 239 }
 240 //-------------------------------------------------------------------
 241 void AliFMDv1::Init()
 242 {
 243 // Initialises version 0 of the Forward Multiplicity Detector
 244 //
 245 AliMC* gMC=AliMC::GetMC();
 246 AliFMD::Init();
 247 fIdSens1=gMC->VolId("GRN1");
 248 fIdSens2=gMC->VolId("GRN2");
 249 fIdSens3=gMC->VolId("GRN3");
 250 fIdSens4=gMC->VolId("GRN4");
 251 fIdSens5=gMC->VolId("GRN5");
 252 printf("*** FMD version 1 initialized ***\n");
 253 }
 254
 255 //-------------------------------------------------------------------
 256
 257 void AliFMDv1::StepManager()
 258 {
 259   //
 260   // Called for every step in the Forward Multiplicity Detector
 261   //
 262   Int_t id,copy,copy1,copy2;
 263   static Float_t hits[9];
 264   static Int_t vol[3];
 265   static Float_t de;
 266   TLorentzVector pos;
 267   TLorentzVector mom;
 268
 269
 270   TClonesArray &lhits = *fHits;
 271   AliMC* gMC=AliMC::GetMC();
 272   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 273
 274   Float_t charge = gMC->TrackCharge();
 275   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 276
 277   //  printf(" in StepManeger \n");
 278   id=gMC->CurrentVolID(copy);
 279   //((TGeant3*)gMC)->Gpcxyz();
 280
 281 // Check the sensetive volume
 282    if(id==fIdSens1||id==fIdSens2||id==fIdSens3||id==fIdSens4||id==fIdSens5)
 283      {
 284        if(gMC->IsTrackEntering())
 285          {
 286            vol[2]=copy;
 287            gMC->CurrentVolOffID(1,copy1);
 288            vol[1]=copy1;
 289            gMC->CurrentVolOffID(2,copy2);
 290            vol[0]=copy2;
 291
 292            gMC->TrackPosition(pos);
 293            hits[0]=pos[0];
 294            hits[1]=pos[1];
 295            hits[2]=pos[2];
 296
 297            gMC->TrackMomentum(mom);
 298            hits[3]=mom[0];
 299            hits[4]=mom[1];
 300            hits[5]=mom[2];
 301
 302            Int_t iPart= gMC->TrackPid();
 303            Int_t partId=gMC->IdFromPDG(iPart);
 304            hits[7]=partId;
 305            hits[8]=1e9*gMC->TrackTime();
 306            de=0.;
 307          }
 308        if(gMC->IsTrackInside()){
 309            de=de+1000.*gMC->Edep();
 310        }
 311
 312        if(gMC->IsTrackExiting()
 313           ||gMC->IsTrackDisappeared()||
 314           gMC->IsTrackStop())
 315          {
 316              hits[6]=de+1000.*gMC->Edep();
 317       new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 318          } // IsTrackExiting()
 319      }
 320   }
 321 //--------------------------------------------------------------------------
 322
 323 void AliFMDv1::Response( Float_t Edep)
 324 {
 325   Float_t I=1.664*0.04*2.33/22400; // = 0.69e-6;
 326   Float_t chargeOnly=Edep/I;
 327   //Add noise ~500electrons
 328   Int_t charge=500;
 329   if (Edep>0)
 330      charge=Int_t(gRandom->Gaus(chargeOnly,500));
 331  }
 332
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