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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  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 "AliRun.h"
  39 #include "AliMC.h"
  40 #include <iostream.h>
  41 #include <fstream.h>
  42 #include "AliMagF.h"
  43 #include "AliFMDhit.h"
  44 #include "AliFMDdigit.h"
  45 #include <stdlib.h>
  46 //#include "TGeant3.h"
  47 //class TGeant3;
  48 ClassImp(AliFMDv1)
  49
  50 //--------------------------------------------------------------------
  51 AliFMDv1::AliFMDv1(const char *name, const char *title):
  52  AliFMD(name,title)
  53 {
  54   //
  55   // Standart constructor for Forward Multiplicity Detector version 0
  56   //
  57   fIdSens1=0;
  58 //  setBufferSize(128000);
  59 }
  60 //-------------------------------------------------------------------------
  61 void AliFMDv1::CreateGeometry()
  62 {
  63  //
  64   // Create the geometry of Forward Multiplicity Detector version 0
  65   //
  66   //Detector consists of 6 volumes:
  67   // 1st covered pseudorapidity interval from 3.3 to 2.0
  68   // and placed on 65cm in Z-direction;
  69   // 2nd - from 2.0 to 1.6 and Z=85 cm;
  70   // 3d  - the same pseudorapidity interval as the 1st
  71   // but on the other side from the interaction point z=-65cm;
  72   // 4th - simmetricaly with the 2nd :
  73   // pseudorapidity from 2.0 to 1.6, Z=-85cm
  74   // 5th - from 3.6 to 4.7, Z=-270cm
  75   // 6th - from 4.5 to 5.5 , Z=-630cm.
  76   // Each part has 400mkm Si (sensetive area, detector itself),
  77   // 0.75cm of plastic simulated electronics material,
  78   // Al support ring 2cm thickness and 1cm width placed on
  79   // the outer radius of each Si disk;
  80   //
  81   // begin Html
  82   /*
  83    <img src="gif/AliFMDv0.gif">
  84    */
  85   //
  86
  87   Int_t *idtmed = fIdtmed->GetArray();
  88
  89   Int_t ifmd;
  90   Int_t idrotm[999];
  91   Float_t zfmd,par[3];
  92   char name[5];
  93
  94   Float_t rin[6], rout[6],zpos;
  95   Float_t etain[6]= {3.3, 2.0, 3.3, 2.0, 4.7, 5.5};
  96   Float_t etaout[6]={2.0, 1.6, 2.0, 1.6, 3.6, 4.5};
  97   Float_t z[6]={64., 85., -64., -85., -270., -630};
  98   Float_t zDet=0.04;
  99   Float_t zElectronic=0.75;
 100   Float_t zSupport=1.;
 101   Float_t zFMD=3.;
 102 //-------------------------------------------------------------------
 103  //  FMD
 104  //------------------------------------------------------------------
 105
 106   AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
 107
 108   gMC->Gsvolu("GFSI","TUBE", idtmed[1], par, 0);
 109   gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
 110   gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
 111
 112   for (ifmd =0; ifmd < 4; ifmd++){
 113
 114     sprintf(name,"FMD%d",ifmd);
 115     printf(name);
 116
 117     zfmd=TMath::Abs(z[ifmd]);
 118     printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
 119     AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
 120     AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
 121
 122     par[0]=rin[ifmd]; // pipe size
 123     par[1]=rout[ifmd];
 124     par[2]=zFMD/2;
 125     gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
 126
 127     printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
 128     if (z[ifmd] < 0){
 129       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
 130     else {
 131       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
 132   //Silicon detector
 133     par[2]=zDet/2;
 134     zpos=zFMD/2 -par[2];
 135     gMC->Gsposp("GFSI",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 136
 137     //Plastic slice for electronics
 138     par[2]=zElectronic/2;
 139     zpos=zpos-zDet/2-par[2];
 140     gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 141
 142    //Simple Al support
 143    par[1]=rout[ifmd];
 144    par[0]=rout[ifmd]-2;
 145    par[2]=zSupport/2;
 146    zpos=zpos-zElectronic/2-par[2];
 147    gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 148
 149
 150   }
 151
 152    //Silicon
 153
 154
 155   gMC->Gsdvn("GSEC", "GFSI", 16, 2);
 156   gMC->Gsdvn("GRIN", "GSEC", 128, 1);
 157    /*
 158       for (Int_t i=0; i<16; i++){
 159       sprintf(ring,"GR%d",i);
 160       printf(ring);
 161       gMC->Gsdvn(ring, "GSEC", 128, 1);
 162     }
 163       */
 164
 165 }
 166 //------------------------------------------------------------------------
 167 void AliFMDv1::CreateMaterials()
 168 {
 169  Int_t isxfld   = gAlice->Field()->Integ();
 170  Float_t sxmgmx = gAlice->Field()->Max();
 171
 172  // Plastic CH
 173  Float_t aPlastic[2]={1.01,12.01};
 174  Float_t zPlastic[2]={1,6};
 175  Float_t wPlastic[2]={1,1};
 176  Float_t denPlastic=1.03;
 177    //
 178
 179  //*** Definition Of avaible FMD materials ***
 180  AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
 181  AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
 182  AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
 183  AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
 184
 185
 186 //**
 187  AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 188  AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 189  AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 190  AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
 191
 192
 193
 194 }
 195 //---------------------------------------------------------------------
 196 void AliFMDv1::DrawDetector()
 197 {
 198 //
 199 // Draw a shaded view of the Forward multiplicity detector version 0
 200 //
 201
 202 AliMC* pMC = AliMC::GetMC();
 203
 204 //Set ALIC mother transparent
 205 pMC->Gsatt("ALIC","SEEN",0);
 206 //
 207 //Set volumes visible
 208 gMC->Gsatt("FMD0","SEEN",1);
 209 gMC->Gsatt("FMD1","SEEN",1);
 210 gMC->Gsatt("FMD2","SEEN",1);
 211 gMC->Gsatt("FMD3","SEEN",1);
 212 gMC->Gsatt("FMD4","SEEN",1);
 213 gMC->Gsatt("FMD5","SEEN",1);
 214
 215 //
 216 gMC->Gdopt("hide","on");
 217 gMC->Gdopt("shad","on");
 218 gMC->SetClipBox(".");
 219 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 220 gMC->DefaultRange();
 221 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 222 gMC->Gdhead(1111,"Forward multiplicity detector");
 223 gMC->Gdopt("hide","off");
 224 }
 225 //-------------------------------------------------------------------
 226 void AliFMDv1::Init()
 227 {
 228 // Initialises version 0 of the Forward Multiplicity Detector
 229 //
 230 AliMC* gMC=AliMC::GetMC();
 231 AliFMD::Init();
 232 fIdSens1=gMC->VolId("GRIN");
 233 printf("*** FMD version 1 initialized ***\n");
 234 }
 235
 236 //-------------------------------------------------------------------
 237
 238 void AliFMDv1::StepManager()
 239 {
 240   //
 241   // Called for every step in the Forward Multiplicity Detector
 242   //
 243   Int_t id,copy,copy1,copy2;
 244   static Float_t hits[9];
 245   static Int_t vol[3];
 246   static Float_t de;
 247   TLorentzVector pos;
 248   TLorentzVector mom;
 249
 250
 251   TClonesArray &lhits = *fHits;
 252   AliMC* gMC=AliMC::GetMC();
 253   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 254
 255   Float_t charge = gMC->TrackCharge();
 256   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 257
 258   //  printf(" in StepManeger \n");
 259   id=gMC->CurrentVolID(copy);
 260
 261 // Check the sensetive volume
 262    if(id==fIdSens1)
 263      {
 264        if(gMC->IsTrackEntering())
 265          {
 266            //      ((TGeant3*)gMC)->Gpcxyz();
 267            vol[2]=copy;
 268            gMC->CurrentVolOffID(1,copy1);
 269            vol[1]=copy1;
 270            gMC->CurrentVolOffID(2,copy2);
 271            vol[0]=copy2;
 272            gMC->TrackPosition(pos);
 273            hits[0]=pos[0];
 274            hits[1]=pos[1];
 275            hits[2]=pos[2];
 276            gMC->TrackMomentum(mom);
 277            hits[3]=mom[0];
 278            hits[4]=mom[1];
 279            hits[5]=mom[2];
 280
 281            Int_t iPart= gMC->TrackPid();
 282            Int_t partId=gMC->IdFromPDG(iPart);
 283            hits[7]=partId;
 284            hits[8]=1e9*gMC->TrackTime();
 285            de=0.;
 286            //      for(i=0; i<9; i++) printf(" hits %f \n",hits[i]);
 287          }
 288        if(gMC->IsTrackInside()){
 289            de=de+1000.*gMC->Edep();
 290        }
 291
 292        if(gMC->IsTrackExiting()
 293           ||gMC->IsTrackDisappeared()||
 294           gMC->IsTrackStop())
 295          {
 296              hits[6]=de+1000.*gMC->Edep();
 297     new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 298          } // IsTrackExiting()
 299      }
 300   }
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