TFluka/source_bg.cxx

   1 #define METHODDEBUG
   2
   3 // Fortran
   4 #include "TCallf77.h"
   5
   6 // Fluka commons
   7 #include "Fdblprc.h"  //(DBLPRC) fluka common
   8 #include "Fdimpar.h"  //(DIMPAR) fluka parameters
   9 #include "Fepisor.h"  //(EPISOR) fluka common
  10 #include "Fstack.h"   //(STACK)  fluka common
  11 #include "Fstars.h"   //(STARS)  fluka common
  12 #include "Fbeam.h"    //(BEAM)   fluka common
  13 #include "Fpaprop.h"  //(PAPROP) fluka common
  14 #include "Fltclcm.h"  //(LTCLCM) fluka common
  15 #include "Fpart.h"
  16 //#include "Fcaslim.h"  //(CASLIM) fluka common
  17
  18 //Virutal MC
  19 #include "AliGenerator.h"
  20 #include "AliStack.h"
  21 #include "../THijing/AliGenHijing.h"
  22
  23 #include "TVirtualMCStack.h"
  24 #include "TParticle.h"
  25 #include "TVector3.h"
  26 #include "TRandom.h"
  27
  28 //Other
  29 #include <Riostream.h>
  30
  31 #ifndef WIN32
  32 # define source source_
  33 # define geocrs geocrs_
  34 # define georeg georeg_
  35 # define geohsm geohsm_
  36 # define soevsv soevsv_
  37 # define mcihad mcihad_
  38 # define source_bg source_bg__
  39 #else
  40 # define source SOURCE
  41 # define geocrs GEOCRS
  42 # define georeg GEOREG
  43 # define geohsm GEOHSM
  44 # define soevsv SOEVSV
  45 # define mcihad MCIHAD
  46 # define source_bg SOURCE_BG
  47 #endif
  48
  49 extern "C" {
  50   //
  51   // Prototypes for FLUKA functions
  52   //
  53   void type_of_call geocrs(Double_t &, Double_t &, Double_t &);
  54   void type_of_call georeg(Double_t &, Double_t &, Double_t &,
  55                            Int_t &, Int_t &);
  56   void type_of_call geohsm(Int_t &, Int_t &, Int_t &, Int_t &);
  57   void type_of_call soevsv();
  58   int  type_of_call mcihad(const int&);
  59  /*
  60    *----------------------------------------------------------------------*
  61    *                                                                      *
  62    *     Created on 07 january 1990   by    Alfredo Ferrari & Paola Sala  *
  63    *                                                   Infn - Milan       *
  64    *                                                                      *
  65    *     Last change on 21-jun-98     by    Alfredo Ferrari               *
  66    *                                                                      *
  67    *     C++ version on 27-sep-02     by    Isidro Gonzalez               *
  68    *                                                                      *
  69    *  This is just an example of a possible user written source routine.  *
  70    *  note that the beam card still has some meaning - in the scoring the *
  71    *  maximum momentum used in deciding the binning is taken from the     *
  72    *  beam momentum.  Other beam card parameters are obsolete.            *
  73    *                                                                      *
  74    *----------------------------------------------------------------------*/
  75
  76   void source_bg(Int_t& nomore) {
  77
  78       static Bool_t lfirst       = true;
  79       static AliGenHijing* gener = 0;
  80       static AliStack* stack     = 0;
  81
  82       nomore = 0;
  83       TParticle* particle;
  84       Int_t itrack = -1;
  85       if (lfirst) {
  86           EPISOR.tkesum = zerzer;
  87           lfirst = false;
  88           EPISOR.lussrc = true;
  89 //
  90 // The generator
  91 //
  92           gener  = new AliGenHijing(-1);
  93 // beam energy
  94           gener->SetEnergyCMS(7000.);
  95 // reference frame
  96           gener->SetReferenceFrame("LAB");
  97 // projectile
  98           gener->SetProjectile("P",  1,  1);
  99           gener->SetTarget    ("A", 16,  8);
 100 // tell hijing to keep the full parent child chain
 101           gener->KeepFullEvent();
 102 // enable jet quenching
 103           gener->SetJetQuenching(0);
 104 // enable shadowing
 105           gener->SetShadowing(0);
 106 // neutral pion and heavy particle decays switched off
 107           gener->SetDecaysOff(1);
 108 // Don't track spectators
 109           gener->SetSpectators(0);
 110 // The particle stack
 111           stack = new AliStack(1000);
 112           gener->SetStack(stack);
 113           gener->Init();
 114
 115       } else {
 116           //
 117           // Generate event
 118           stack->Reset();
 119           gener->Generate();
 120           Int_t npart = stack->GetNprimary();
 121           // Vertex
 122           Float_t za   =  4000. * gRandom->Rndm() - 2000.;
 123           // Direction
 124           Float_t dir  = (gRandom->Rndm() < 0.5) ? 1. : -1.;
 125
 126
 127           for (Int_t part=0; part<npart; part++) {
 128               particle = stack->Particle(part);
 129               Int_t ic = particle->GetFirstDaughter();
 130               if (ic != -1) continue;
 131               Int_t pdg = particle->GetPdgCode();
 132               Int_t intfluka = mcihad(pdg);
 133               Int_t ifl = GetFlukaKPTOIP(intfluka);
 134               TVector3 polarisation;
 135               particle->GetPolarisation(polarisation);
 136
 137               STACK.lstack++;
 138
 139               printf("Particle %5d %5d %5d %10s %10.3f %10.3f %10.3f \n", STACK.lstack, pdg, ifl,
 140                      particle->GetName(), particle->Px(), particle->Py(), particle->Pz());
 141
 142
 143
 144               /* Wt is the weight of the particle*/
 145               STACK.wt[STACK.lstack] = oneone;
 146               STARS.weipri += STACK.wt[STACK.lstack];
 147
 148               STACK.ilo[STACK.lstack] = ifl;
 149               /* From this point .....
 150                * Particle generation (1 for primaries)
 151                */
 152               STACK.lo[STACK.lstack] = 1;
 153
 154               /* User dependent flag:*/
 155               STACK.louse[STACK.lstack] = 0;
 156
 157               /* User dependent spare variables:*/
 158               Int_t ispr = 0;
 159               for (ispr = 0; ispr < mkbmx1; ispr++)
 160                   STACK.sparek[STACK.lstack][ispr] = zerzer;
 161
 162               /* User dependent spare flags:*/
 163               for (ispr = 0; ispr < mkbmx2; ispr++)
 164                   STACK.ispark[STACK.lstack][ispr] = 0;
 165
 166               /* Save the track number of the stack particle:*/
 167               STACK.ispark[STACK.lstack][mkbmx2-1] = itrack;
 168               STACK.nparma++;
 169               STACK.numpar[STACK.lstack] = STACK.nparma;
 170               STACK.nevent[STACK.lstack] = 0;
 171               STACK.dfnear[STACK.lstack] = +zerzer;
 172
 173               /* Particle age (s)*/
 174               STACK.agestk[STACK.lstack] = +zerzer;
 175               STACK.aknshr[STACK.lstack] = -twotwo;
 176
 177               /* Group number for "low" energy neutrons, set to 0 anyway*/
 178               STACK.igroup[STACK.lstack] = 0;
 179
 180               /* Kinetic energy */
 181               STACK.tke[STACK.lstack] = particle->Energy() - particle->GetMass();
 182
 183
 184               /* Particle momentum*/
 185               STACK.pmom [STACK.lstack] = particle->P();
 186
 187               /* Cosines (tx,ty,tz)*/
 188               Double_t cosx = particle->Px()/particle->P();
 189               Double_t cosy = particle->Py()/particle->P();
 190               Double_t cosz = TMath::Sqrt(oneone - cosx*cosx - cosy*cosy);
 191               if (particle->Pz() < 0.)   cosz = -cosz;
 192               cosz *= dir;
 193
 194               STACK.tx [STACK.lstack] = cosx;
 195               STACK.ty [STACK.lstack] = cosy;
 196               STACK.tz [STACK.lstack] = cosz;
 197
 198               /* Polarization cosines:*/
 199               if (polarisation.Mag()) {
 200                   Double_t cospolx = polarisation.Px()/polarisation.Mag();
 201                   Double_t cospoly = polarisation.Py()/polarisation.Mag();
 202                   Double_t cospolz = sqrt(oneone - cospolx*cospolx - cospoly*cospoly);
 203                   STACK.tx [STACK.lstack] = cospolx;
 204                   STACK.ty [STACK.lstack] = cospoly;
 205                   STACK.tz [STACK.lstack] = cospolz;
 206               }
 207               else {
 208                   STACK.txpol [STACK.lstack] = -twotwo;
 209                   STACK.typol [STACK.lstack] = +zerzer;
 210                   STACK.tzpol [STACK.lstack] = +zerzer;
 211               }
 212
 213               /* Particle coordinates*/
 214               STACK.xa [STACK.lstack] = particle->Vx();
 215               STACK.ya [STACK.lstack] = particle->Vy();
 216               STACK.za [STACK.lstack] = za;
 217
 218               printf("Particle Vertex %10.3f %10.3f %10.3f %10.3f \n",
 219                      STACK.xa [STACK.lstack],  STACK.ya [STACK.lstack],  STACK.za [STACK.lstack], dir);
 220
 221
 222
 223               /*  Calculate the total kinetic energy of the primaries: don't change*/
 224               Int_t st_ilo =  STACK.ilo[STACK.lstack];
 225               if ( st_ilo != 0 )
 226                   EPISOR.tkesum +=
 227                       ((STACK.tke[STACK.lstack] + PAPROP.amdisc[st_ilo+6])
 228                        * STACK.wt[STACK.lstack]);
 229               else
 230                   EPISOR.tkesum += (STACK.tke[STACK.lstack] * STACK.wt[STACK.lstack]);
 231
 232               /*  Here we ask for the region number of the hitting point.
 233                *     NREG (LSTACK) = ...
 234                *  The following line makes the starting region search much more
 235                *  robust if particles are starting very close to a boundary:
 236                */
 237               geocrs( STACK.tx[STACK.lstack],
 238                       STACK.ty[STACK.lstack],
 239                       STACK.tz[STACK.lstack] );
 240
 241               Int_t idisc;
 242
 243               georeg ( STACK.xa[STACK.lstack],
 244                        STACK.ya[STACK.lstack],
 245                        STACK.za[STACK.lstack],
 246                        STACK.nreg[STACK.lstack],
 247                        idisc);//<-- dummy return variable not used
 248               /*  Do not change these cards:*/
 249               Int_t igeohsm1 = 1;
 250               Int_t igeohsm2 = -11;
 251               geohsm ( STACK.nhspnt[STACK.lstack], igeohsm1, igeohsm2, LTCLCM.mlattc );
 252               STACK.nlattc[STACK.lstack] = LTCLCM.mlattc;
 253               soevsv();
 254           }
 255       }
 256   }
 257 }
 258
 259