FMD/AliFMDv1.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  *                                                                        *
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  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 /* $Id$ */
  17
  18  /////////////////////////////////////////////////////////////////////
  19 //                                                                 //
  20 // Forward Multiplicity detector based on Silicon version 0        //
  21 //
  22 //Begin Html
  23 /*
  24 <img src="gif/AliFMDv0Class.gif">
  25 */
  26 //End Html
  27 //                                                                  //
  28 //                                                                  //
  29 //////////////////////////////////////////////////////////////////////
  30
  31 #include <Riostream.h>
  32 #include <stdlib.h>
  33
  34 #include <TClonesArray.h>
  35 #include <TDirectory.h>
  36 #include <TFile.h>
  37 #include <TGeometry.h>
  38 #include <TLorentzVector.h>
  39 #include <TMath.h>
  40 #include <TNode.h>
  41 #include <TTUBE.h>
  42 #include <TTree.h>
  43 #include <TVirtualMC.h>
  44
  45 #include "AliFMDdigit.h"
  46 #include "AliFMDhit.h"
  47 #include "AliFMDv0.h"
  48 #include "AliFMDv1.h"
  49 #include "AliMagF.h"
  50 #include "AliRun.h"
  51
  52 ClassImp(AliFMDv1)
  53
  54 //--------------------------------------------------------------------
  55 AliFMDv1::AliFMDv1(const char *name, const char *title):
  56  AliFMD(name,title)
  57 {
  58   //
  59   // Standart constructor for Forward Multiplicity Detector version 0
  60   //
  61   fIdSens1=0;
  62   fIdSens2=0;
  63   fIdSens3=0;
  64   fIdSens4=0;
  65   fIdSens5=0;
  66 //  setBufferSize(128000);
  67 }
  68 //-------------------------------------------------------------------------
  69 void AliFMDv1::CreateGeometry()
  70 {
  71  //
  72   // Create the geometry of Forward Multiplicity Detector version 0
  73   //
  74   //Detector consists of 6 volumes:
  75   // 1st covered pseudorapidity interval from 3.3 to 2.0
  76   // and placed on 65cm in Z-direction;
  77   // 2nd - from 2.0 to 1.6 and Z=85 cm;
  78   // 3d  - the same pseudorapidity interval as the 1st
  79   // but on the other side from the interaction point z=-65cm;
  80   // 4th - simmetricaly with the 2nd :
  81   // pseudorapidity from 2.0 to 1.6, Z=-85cm
  82   // 5th - from 3.6 to 4.7, Z=-270cm
  83   // 6th - from 4.5 to 5.5 , Z=-630cm.
  84   // Each part has 400mkm Si (sensetive area, detector itself),
  85   // 0.75cm of plastic simulated electronics material,
  86   // Al support ring 2cm thickness and 1cm width placed on
  87   // the outer radius of each Si disk;
  88   //
  89   // begin Html
  90   /*
  91    <img src="gif/AliFMDv0.gif">
  92    */
  93   //
  94
  95
  96   Int_t *idtmed = fIdtmed->GetArray();
  97
  98   Int_t ifmd;
  99   Int_t idrotm[999];
 100   Float_t zfmd,par[3];
 101   char name[5], nameSi[5], nameSector[5], nameRing[5];
 102
 103   Float_t rin[6], rout[6],zpos;
 104
 105   Float_t etain[5]= {3.40, 2.29, 3.68, 2.29, 5.09};
 106   Float_t etaout[6]={2.01, 1.70, 2.28, 1.70, 3.68};
 107   //  Float_t z[6]={64., 85., -64., -85., -270., -630};
 108   Float_t z[6]={62.8, 75.2, -83.4, -75.2, -340.};
 109   Float_t zDet=0.03;
 110   Float_t zElectronic=0.1;
 111   Float_t zSupport=1.;
 112
 113   Float_t zFMD=1.;
 114 //-------------------------------------------------------------------
 115  //  FMD
 116  //------------------------------------------------------------------
 117         cout<<" !!!!!!!!!!!New FMD geometry !!!!!!!!!"<<endl;
 118
 119   AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
 120
 121   //  gMC->Gsvolu("GSI","TUBE", idtmed[1], par, 0);
 122   gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
 123   gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
 124
 125   for (ifmd =0; ifmd < 5; ifmd++){
 126
 127     sprintf(name,"FMD%d",ifmd+1);
 128     sprintf(nameSi,"GSI%d",ifmd+1);
 129     sprintf(nameSector,"GSC%d",ifmd+1);
 130     sprintf(nameRing,"GRN%d",ifmd+1);
 131
 132     zfmd=TMath::Abs(z[ifmd]);
 133
 134     AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
 135     AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
 136
 137     par[0]=rin[ifmd]; // pipe size
 138     par[1]=rout[ifmd];
 139     par[2]=zFMD/2;
 140     gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
 141     gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
 142
 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
 152     //Granularity
 153     fSectorsSi1=20;
 154     fRingsSi1=256;
 155     fSectorsSi2=40;
 156     fRingsSi2=128;
 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 //Set ALIC mother transparent
 222 gMC->Gsatt("ALIC","SEEN",0);
 223 //
 224 //Set volumes visible
 225 gMC->Gsatt("FMD1","SEEN",1);
 226 gMC->Gsatt("FMD2","SEEN",1);
 227 gMC->Gsatt("FMD3","SEEN",1);
 228 gMC->Gsatt("FMD4","SEEN",1);
 229 gMC->Gsatt("FMD5","SEEN",1);
 230
 231 //
 232 gMC->Gdopt("hide","on");
 233 gMC->Gdopt("shad","on");
 234 gMC->SetClipBox(".");
 235 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 236 gMC->DefaultRange();
 237 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 238 gMC->Gdhead(1111,"Forward multiplicity detector");
 239 gMC->Gdopt("hide","off");
 240 }
 241 //-------------------------------------------------------------------
 242 void AliFMDv1::Init()
 243 {
 244 // Initialises version 0 of the Forward Multiplicity Detector
 245 //
 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   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 272
 273   Float_t charge = gMC->TrackCharge();
 274   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 275
 276   //  printf(" in StepManeger \n");
 277   id=gMC->CurrentVolID(copy);
 278   //((TGeant3*)gMC)->Gpcxyz();
 279
 280 // Check the sensetive volume
 281    if(id==fIdSens1||id==fIdSens2||id==fIdSens3||id==fIdSens4||id==fIdSens5)
 282      {
 283        if(gMC->IsTrackEntering())
 284          {
 285            vol[2]=copy;
 286            gMC->CurrentVolOffID(1,copy1);
 287            vol[1]=copy1;
 288            gMC->CurrentVolOffID(2,copy2);
 289            vol[0]=copy2;
 290
 291            gMC->TrackPosition(pos);
 292            hits[0]=pos[0];
 293            hits[1]=pos[1];
 294            hits[2]=pos[2];
 295
 296            gMC->TrackMomentum(mom);
 297            hits[3]=mom[0];
 298            hits[4]=mom[1];
 299            hits[5]=mom[2];
 300
 301            Int_t iPart= gMC->TrackPid();
 302            Int_t partId=gMC->IdFromPDG(iPart);
 303            hits[7]=partId;
 304            hits[8]=1e9*gMC->TrackTime();
 305            de=0.;
 306          }
 307        if(gMC->IsTrackInside()){
 308            de=de+1000.*gMC->Edep();
 309        }
 310
 311        if(gMC->IsTrackExiting()
 312           ||gMC->IsTrackDisappeared()||
 313           gMC->IsTrackStop())
 314          {
 315              hits[6]=de+1000.*gMC->Edep();
 316       new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
 317          } // IsTrackExiting()
 318      }
 319   }
 320 //--------------------------------------------------------------------------
 321
 322 void AliFMDv1::Response( Float_t Edep)
 323 {
 324   Float_t I=1.664*0.04*2.33/22400; // = 0.69e-6;
 325   Float_t chargeOnly=Edep/I;
 326   //Add noise ~500electrons
 327   Int_t charge=500;
 328   if (Edep>0)
 329      charge=Int_t(gRandom->Gaus(chargeOnly,500));
 330  }
 331
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