FMD/AliFMDv0.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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  10  * copies and that both the copyright notice and this permission notice   *
  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 <TNode.h>
  32 #include <TLorentzVector.h>
  33 #include "AliFMDv0.h"
  34 #include "AliRun.h"
  35 #include "AliMC.h"
  36 #include <iostream.h>
  37 #include <fstream.h>
  38
  39 #include "AliMagF.h"
  40 #include "AliFMDhit.h"
  41 #include <stdlib.h>
  42
  43 //class TGeant3;
  44 ClassImp(AliFMDv0)
  45
  46 //--------------------------------------------------------------------
  47 AliFMDv0::AliFMDv0(const char *name, const char *title):
  48  AliFMD(name,title)
  49 {
  50   //
  51   // Standart constructor for Forward Multiplicity Detector version 0
  52   //
  53   fIdSens1=0;
  54 //  setBufferSize(128000);
  55 }
  56 //-------------------------------------------------------------------------
  57 void AliFMDv0::CreateGeometry()
  58 {
  59  //
  60   // Create the geometry of Forward Multiplicity Detector version 0
  61   //
  62   //Detector consists of 6 volumes:
  63   // 1st covered pseudorapidity interval from 3.3 to 2.0
  64   // and placed on 65cm in Z-direction;
  65   // 2nd - from 2.0 to 1.6 and Z=85 cm;
  66   // 3d  - the same pseudorapidity interval as the 1st
  67   // but on the other side from the interaction point z=-65cm;
  68   // 4th - simmetricaly with the 2nd :
  69   // pseudorapidity from 2.0 to 1.6, Z=-85cm
  70   // 5th - from 3.6 to 4.7, Z=-270cm
  71   // 6th - from 4.5 to 5.5 , Z=-630cm.
  72   // Each part has 400mkm Si (sensetive area, detector itself),
  73   // 0.75cm of plastic simulated electronics material,
  74   // Al support ring 2cm thickness and 1cm width placed on
  75   // the outer radius of each Si disk;
  76   //
  77   // begin Html
  78   /*
  79    <img src="gif/AliFMDv0.gif">
  80   */
  81   //
  82
  83   Int_t *idtmed = fIdtmed->GetArray();
  84
  85   Int_t ifmd;
  86   Int_t idrotm[999];
  87   Float_t zfmd,par[3];
  88   char name[5];
  89
  90   Float_t rin[6], rout[6],zpos;
  91   Float_t etain[6]= {3.3, 2.0, 3.3, 2.0, 4.7, 5.5};
  92   Float_t etaout[6]={2.0, 1.6, 2.0, 1.6, 3.6, 4.5};
  93   Float_t z[6]={64., 85., -64., -85., -270., -630};
  94   Float_t zDet=0.04;
  95   Float_t zElectronic=0.75;
  96   Float_t zSupport=1.;
  97   Float_t zFMD=3.;
  98 //-------------------------------------------------------------------
  99  //  FMD
 100  //------------------------------------------------------------------
 101
 102   AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
 103
 104   gMC->Gsvolu("GFSI","TUBE", idtmed[1], par, 0);
 105   gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
 106   gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
 107
 108   for (ifmd =0; ifmd < 6; ifmd++){
 109
 110     sprintf(name,"FMD%d",ifmd);
 111     printf(name);
 112
 113     zfmd=TMath::Abs(z[ifmd]);
 114     printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
 115     AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
 116     AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
 117
 118     par[0]=rin[ifmd]; // pipe size
 119     par[1]=rout[ifmd];
 120     par[2]=zFMD/2;
 121     gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
 122
 123     printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
 124     if (z[ifmd] < 0){
 125       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
 126     else {
 127       gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
 128   //Silicon detector
 129     par[2]=zDet/2;
 130     zpos=zFMD/2 -par[2];
 131     gMC->Gsposp("GFSI",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 132
 133     //Plastic slice for electronics
 134     par[2]=zElectronic/2;
 135     zpos=zpos-zDet/2-par[2];
 136     gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 137
 138    //Simple Al support
 139    par[1]=rout[ifmd];
 140    par[0]=rout[ifmd]-2;
 141    par[2]=zSupport/2;
 142    zpos=zpos-zElectronic/2-par[2];
 143    gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
 144
 145
 146   }
 147   //Silicon
 148
 149
 150
 151
 152 }
 153 //------------------------------------------------------------------------
 154 void AliFMDv0::CreateMaterials()
 155 {
 156  Int_t isxfld   = gAlice->Field()->Integ();
 157  Float_t sxmgmx = gAlice->Field()->Max();
 158
 159  // Plastic CH
 160  Float_t aPlastic[2]={1.01,12.01};
 161  Float_t zPlastic[2]={1,6};
 162  Float_t wPlastic[2]={1,1};
 163  Float_t denPlastic=1.03;
 164    //
 165
 166  //*** Definition Of avaible FMD materials ***
 167  AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
 168  AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
 169  AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
 170  AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
 171
 172
 173 //**
 174  AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 175  AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 176  AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 177  AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
 178
 179
 180
 181 }
 182 //---------------------------------------------------------------------
 183 void AliFMDv0::DrawDetector()
 184 {
 185 //
 186 // Draw a shaded view of the Forward multiplicity detector version 0
 187 //
 188
 189 AliMC* pMC = AliMC::GetMC();
 190
 191 //Set ALIC mother transparent
 192 pMC->Gsatt("ALIC","SEEN",0);
 193 //
 194 //Set volumes visible
 195 gMC->Gsatt("FMD0","SEEN",1);
 196 gMC->Gsatt("FMD1","SEEN",1);
 197 gMC->Gsatt("FMD2","SEEN",1);
 198 gMC->Gsatt("FMD3","SEEN",1);
 199 gMC->Gsatt("FMD4","SEEN",1);
 200 gMC->Gsatt("FMD5","SEEN",1);
 201
 202 //
 203 gMC->Gdopt("hide","on");
 204 gMC->Gdopt("shad","on");
 205 gMC->SetClipBox(".");
 206 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 207 gMC->DefaultRange();
 208 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
 209 gMC->Gdhead(1111,"Forward multiplicity detector");
 210 gMC->Gdopt("hide","off");
 211 }
 212 //-------------------------------------------------------------------
 213 void AliFMDv0::Init()
 214 {
 215 // Initialises version 0 of the Forward Multiplicity Detector
 216 //
 217 AliMC* gMC=AliMC::GetMC();
 218 AliFMD::Init();
 219 fIdSens1=gMC->VolId("GFSI");
 220 printf("*** FMD version 0 initialized ***\n");
 221
 222 }
 223
 224 //-------------------------------------------------------------------
 225
 226 void AliFMDv0::StepManager()
 227 {
 228   //
 229   // Called for every step in the Forward Multiplicity Detector
 230   //
 231   Int_t id,copy;
 232   static Float_t hits[9];
 233   static Int_t vol[1];
 234   static Float_t de;
 235   TLorentzVector pos;
 236   TLorentzVector mom;
 237
 238
 239   TClonesArray &lhits = *fHits;
 240   AliMC* gMC=AliMC::GetMC();
 241   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 242
 243   Float_t charge = gMC->TrackCharge();
 244   if(TMath::Abs(charge)<=0.) return; //take only charged particles
 245
 246   //  ((TGeant3*)gMC)->Gpcxyz();
 247
 248   id=gMC->CurrentVolID(copy);
 249
 250 // Check the sensetive volume
 251    if(id==fIdSens1)
 252      {
 253        if(gMC->IsTrackEntering())
 254          {
 255            vol[0]=copy;
 256            gMC->TrackPosition(pos);
 257            hits[0]=pos[0];
 258            hits[1]=pos[1];
 259            hits[2]=pos[2];
 260
 261            gMC->TrackMomentum(mom);
 262            hits[3]=mom[0];
 263            hits[4]=mom[1];
 264            hits[5]=mom[2];
 265
 266            Int_t iPart= gMC->TrackPid();
 267            Int_t partId=gMC->IdFromPDG(iPart);
 268            hits[7]=partId;
 269            hits[8]=1e9*gMC->TrackTime();
 270            de=0.;
 271          }
 272        if(gMC->IsTrackInside()){
 273            de=de+1000.*gMC->Edep();
 274        }
 275
 276        if(gMC->IsTrackExiting()
 277           ||gMC->IsTrackDisappeared()||
 278           gMC->IsTrackStop())
 279          {
 280              hits[6]=de+1000.*gMC->Edep();
 281     new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 282          } // IsTrackExiting()
 283      }
 284  }
 285