*$ CREATE SOURCE.FOR
*COPY SOURCE
*
*=== source ===========================================================*
*
      SUBROUTINE SOURCE ( NOMORE )

      INCLUDE '(DBLPRC)'
      INCLUDE '(DIMPAR)'
      INCLUDE '(IOUNIT)'
*
*----------------------------------------------------------------------*
*                                                                      *
*     Copyright (C) 1990-2006      by    Alfredo Ferrari & Paola Sala  *
*     All Rights Reserved.                                             *
*                                                                      *
*                                                                      *
*     New source for FLUKA9x-FLUKA200x:                                *
*                                                                      *
*     Created on 07 january 1990   by    Alfredo Ferrari & Paola Sala  *
*                                                   Infn - Milan       *
*                                                                      *
*     Last change on 03-mar-06     by    Alfredo Ferrari               *
*                                                                      *
*  This is just an example of a possible user written source routine.  *
*  note that the beam card still has some meaning - in the scoring the *
*  maximum momentum used in deciding the binning is taken from the     *
*  beam momentum.  Other beam card parameters are obsolete.            *
*                                                                      *
*----------------------------------------------------------------------*

*----------------------------------------------------------------------*
      INCLUDE '(BEAMCM)'
      INCLUDE '(FHEAVY)'
      INCLUDE '(FLKSTK)'
      INCLUDE '(IOIOCM)'
      INCLUDE '(LTCLCM)'
      INCLUDE '(PAPROP)'
      INCLUDE '(SOURCM)'
      INCLUDE '(SUMCOU)'
*
      LOGICAL LFIRST
*
*  Version for isotropic Heavy ion source
*
      DIMENSION  CUMENE(0:100), ENELOW(0:99), ENEUP(0:99) 
      SAVE LFIRST
      DATA LFIRST / .TRUE. /
*======================================================================*
*                                                                      *
*                 BASIC VERSION                                        *
*                                                                      *
*======================================================================*
*    Heavy ion energy group(Gev/n)
      DATA ENELOW /
     & 0.00000E+00, 1.00000E-03, 1.14980E-03, 1.32190E-03, 1.51990E-03,
     & 1.74750E-03, 2.00920E-03, 2.31010E-03, 2.65610E-03, 3.05390E-03,
     & 3.51120E-03, 4.03700E-03, 4.64160E-03, 5.33670E-03, 6.13590E-03,
     & 7.05480E-03, 8.11130E-03, 9.32600E-03, 1.07230E-02, 1.23280E-02,
     & 1.41750E-02, 1.62980E-02, 1.87380E-02, 2.15440E-02, 2.47710E-02,
     & 2.84800E-02, 3.27450E-02, 3.76490E-02, 4.32880E-02, 4.97700E-02, 
     & 5.72240E-02, 6.57930E-02, 7.56460E-02, 8.69750E-02, 1.00000E-01,
     & 1.14980E-01, 1.32190E-01, 1.51990E-01, 1.74750E-01, 2.00920E-01,
     & 2.31010E-01, 2.65610E-01, 3.05390E-01, 3.51120E-01, 4.03700E-01,
     & 4.64160E-01, 5.33670E-01, 6.13590E-01, 7.05480E-01, 8.11130E-01,
     & 9.32600E-01, 1.07230E+00, 1.23280E+00, 1.41750E+00, 1.62980E+00,
     & 1.87380E+00, 2.15440E+00, 2.47710E+00, 2.84800E+00, 3.27450E+00, 
     & 3.76490E+00, 4.32880E+00, 4.97700E+00, 5.72240E+00, 6.57930E+00,
     & 7.56460E+00, 8.69750E+00, 1.00000E+01, 1.14980E+01, 1.32190E+01,
     & 1.51990E+01, 1.74750E+01, 2.00920E+01, 2.31010E+01, 2.65610E+01,
     & 3.05390E+01, 3.51120E+01, 4.03700E+01, 4.64160E+01, 5.33670E+01,
     & 6.13590E+01, 7.05480E+01, 8.11130E+01, 9.32600E+01, 1.07230E+02,
     & 1.23280E+02, 1.41750E+02, 1.62980E+02, 1.87380E+02, 2.15440E+02, 
     & 2.47710E+02, 2.84800E+02, 3.27450E+02, 3.76490E+02, 4.32880E+02,
     & 4.97700E+02, 5.72240E+02, 6.57930E+02, 7.56460E+02, 8.69750E+02/

      DATA ENEUP /
     & 1.00000E-03, 1.14980E-03, 1.32190E-03, 1.51990E-03, 1.74750E-03,
     & 2.00920E-03, 2.31010E-03, 2.65610E-03, 3.05390E-03, 3.51120E-03,
     & 4.03700E-03, 4.64160E-03, 5.33670E-03, 6.13590E-03, 7.05480E-03,
     & 8.11130E-03, 9.32600E-03, 1.07230E-02, 1.23280E-02, 1.41750E-02,
     & 1.62980E-02, 1.87380E-02, 2.15440E-02, 2.47710E-02, 2.84800E-02,
     & 3.27450E-02, 3.76490E-02, 4.32880E-02, 4.97700E-02, 5.72240E-02, 
     & 6.57930E-02, 7.56460E-02, 8.69750E-02, 1.00000E-01, 1.14980E-01,
     & 1.32190E-01, 1.51990E-01, 1.74750E-01, 2.00920E-01, 2.31010E-01,
     & 2.65610E-01, 3.05390E-01, 3.51120E-01, 4.03700E-01, 4.64160E-01,
     & 5.33670E-01, 6.13590E-01, 7.05480E-01, 8.11130E-01, 9.32600E-01,
     & 1.07230E+00, 1.23280E+00, 1.41750E+00, 1.62980E+00, 1.87380E+00,
     & 2.15440E+00, 2.47710E+00, 2.84800E+00, 3.27450E+00, 3.76490E+00, 
     & 4.32880E+00, 4.97700E+00, 5.72240E+00, 6.57930E+00, 7.56460E+00,
     & 8.69750E+00, 1.00000E+01, 1.14980E+01, 1.32190E+01, 1.51990E+01,
     & 1.74750E+01, 2.00920E+01, 2.31010E+01, 2.65610E+01, 3.05390E+01,
     & 3.51120E+01, 4.03700E+01, 4.64160E+01, 5.33670E+01, 6.13590E+01,
     & 7.05480E+01, 8.11130E+01, 9.32600E+01, 1.07230E+02, 1.23280E+02,
     & 1.41750E+02, 1.62980E+02, 1.87380E+02, 2.15440E+02, 2.47710E+02, 
     & 2.84800E+02, 3.27450E+02, 3.76490E+02, 4.32880E+02, 4.97700E+02,
     & 5.72240E+02, 6.57930E+02, 7.56460E+02, 8.69750E+02, 1.00000E+03/

*    Normalized spectrum
      DATA CUMENE /
     & 0.00000E+00,
     & 9.18166E-06, 1.07735E-05, 1.28897E-05, 1.57070E-05, 1.94544E-05,
     & 2.44404E-05, 3.10745E-05, 3.99033E-05, 5.16524E-05, 6.72883E-05,
     & 8.81044E-05, 1.15825E-04, 1.52739E-04, 2.01908E-04, 2.67410E-04,
     & 3.54670E-04, 4.70903E-04, 6.25735E-04, 8.31649E-04, 1.10575E-03,
     & 1.46971E-03, 1.95215E-03, 2.59057E-03, 3.43300E-03, 4.54006E-03,
     & 5.98934E-03, 7.87688E-03, 1.03211E-02, 1.34642E-02, 1.74782E-02, 
     & 2.25612E-02, 2.89433E-02, 3.68810E-02, 4.66546E-02, 5.85661E-02,
     & 7.29078E-02, 9.00005E-02, 1.10111E-01, 1.33484E-01, 1.60298E-01,
     & 1.90654E-01, 2.24543E-01, 2.61837E-01, 3.02291E-01, 3.45521E-01,
     & 3.91010E-01, 4.38135E-01, 4.86189E-01, 5.34412E-01, 5.82036E-01,
     & 6.28334E-01, 6.72592E-01, 7.14310E-01, 7.53000E-01, 7.88351E-01,
     & 8.20216E-01, 8.48552E-01, 8.73416E-01, 8.94982E-01, 9.13477E-01, 
     & 9.29173E-01, 9.42361E-01, 9.53350E-01, 9.62428E-01, 9.69876E-01,
     & 9.75946E-01, 9.80862E-01, 9.84824E-01, 9.87999E-01, 9.90536E-01,
     & 9.92553E-01, 9.94153E-01, 9.95417E-01, 9.96414E-01, 9.97199E-01,
     & 9.97814E-01, 9.98297E-01, 9.98674E-01, 9.98969E-01, 9.99199E-01,
     & 9.99378E-01, 9.99518E-01, 9.99627E-01, 9.99712E-01, 9.99777E-01,
     & 9.99828E-01, 9.99868E-01, 9.99899E-01, 9.99923E-01, 9.99941E-01, 
     & 9.99956E-01, 9.99967E-01, 9.99975E-01, 9.99982E-01, 9.99987E-01,
     & 9.99991E-01, 9.99994E-01, 9.99997E-01, 9.99999E-01, 1.00000E+00/
*  +-------------------------------------------------------------------*   
      NOMORE = 0
*  +-------------------------------------------------------------------* IF BLOCK
*  |  First call initializations:
      IF ( LFIRST ) THEN
*  |  *** The following 3 cards are mandatory ***
         TKESUM = ZERZER
         LFIRST = .FALSE.
         LUSSRC = .TRUE.
*  |  *** User initialization ***
         write(LUNOUT,*)
         write(LUNOUT,*) '--->modified source.f for Proton in solar min'          
      END IF
*  |
*  +-------------------------------------------------------------------*
*  Push one source particle to the stack. Note that you could as well
*  push many but this way we reserve a maximum amount of space in the
*  stack for the secondaries to be generated
* Npflka is the stack counter: of course any time source is called it
* must be =0
      NPFLKA = NPFLKA + 1
* Wt is the weight of the particle
      WTFLK  (NPFLKA) = ONEONE
      WEIPRI = WEIPRI + WTFLK (NPFLKA)
* Particle type (1=proton.....). Ijbeam is the type set by the BEAM
* card
*  +-------------------------------------------------------------------*

*  +--------------------------------------------------------------------*
*  |  (Radioactive) isotope:
      IF ( IJBEAM .EQ. -2 .AND. LRDBEA ) THEN
         IARES  = IPROA
         IZRES  = IPROZ
         IISRES = IPROM
         CALL STISBM ( IARES, IZRES, IISRES )
         IJHION = IPROZ  * 1000 + IPROA
         IJHION = IJHION * 100 + KXHEAV
         IONID  = IJHION
         CALL DCDION ( IONID )
         CALL SETION ( IONID )
*  |
*  +-------------------------------------------------------------------*
*  |  Heavy ion:
      ELSE IF ( IJBEAM .EQ. -2 ) THEN
         IJHION = IPROZ  * 1000 + IPROA
         IJHION = IJHION * 100 + KXHEAV
         IONID  = IJHION
         CALL DCDION ( IONID )
         CALL SETION ( IONID )
         ILOFLK (NPFLKA) = IJHION
*  |  Flag this is prompt radiation
         LRADDC (NPFLKA) = .FALSE.
*  |
*  +-------------------------------------------------------------------*
*  |  Normal hadron:
      ELSE
         IONID = IJBEAM
         ILOFLK (NPFLKA) = IJBEAM
*  |  Flag this is prompt radiation
         LRADDC (NPFLKA) = .FALSE.
      END IF
*  |
*  +-------------------------------------------------------------------*
* From this point .....
* Particle generation (1 for primaries)
      LOFLK  (NPFLKA) = 1
* User dependent flag:
      LOUSE  (NPFLKA) = 0
* User dependent spare variables:
      DO 100 ISPR = 1, MKBMX1
         SPAREK (ISPR,NPFLKA) = ZERZER
 100  CONTINUE
* User dependent spare flags:
      DO 200 ISPR = 1, MKBMX2
         ISPARK (ISPR,NPFLKA) = 0
 200  CONTINUE
* Save the track number of the stack particle:
      ISPARK (MKBMX2,NPFLKA) = NPFLKA
      NPARMA = NPARMA + 1
      NUMPAR (NPFLKA) = NPARMA
      NEVENT (NPFLKA) = 0
      DFNEAR (NPFLKA) = +ZERZER
* ... to this point: don't change anything
* Particle age (s)
      AGESTK (NPFLKA) = +ZERZER
      AKNSHR (NPFLKA) = -TWOTWO
* Group number for "low" energy neutrons, set to 0 anyway
      IGROUP (NPFLKA) = 0
* Kinetic energy of the particle (GeV)
* Sample the energy group
      XI = FLRNDM(DUMMY)
      DO K = 0 ,99
         IF (XI .GT. CUMENE(K) .AND. XI .LE. CUMENE(K+1)) THEN
            ENERGY = ((ENEUP(K) + ENELOW(K))/ TWOTWO) 
            GO TO 600
         END IF
      END DO
 600   CONTINUE 
      TKEFLK (NPFLKA) = ENERGY
*      TKEFLK (NPFLKA) = SQRT ( PBEAM**2 + AM (IONID)**2 ) - AM (IONID)
* Particle momentum
*      PMOFLK (NPFLKA) = PBEAM
      PMOFLK (NPFLKA) = SQRT ( TKEFLK (NPFLKA) * ( TKEFLK (NPFLKA)
     &                       + TWOTWO * AM (IONID) ) )

*    +-----------------------------------------------------------------*
      Call SFLOOD ( XXX, YYY, ZZZ, UXXX, VXXX, WZZZ )
      UBEAM = UXXX
      VBEAM = VYYY
      WBEAM = WZZZ
* Cosines (tx,ty,tz)
      TXFLK  (NPFLKA) = UBEAM
      TYFLK  (NPFLKA) = VBEAM
      TZFLK  (NPFLKA) = WBEAM
*      TZFLK  (NPFLKA) = SQRT ( ONEONE - TXFLK (NPFLKA)**2
*      &                       - TYFLK (NPFLKA)**2 )
* Polarization cosines:
      TXPOL  (NPFLKA) = -TWOTWO
      TYPOL  (NPFLKA) = +ZERZER
      TZPOL  (NPFLKA) = +ZERZER
* Particle coordinates ( radius of sphere =10 cm)
       XBEAM = XXX * 10.D0
       YBEAM = YYY * 10.D0
       ZBEAM = ZZZ * 10.D0
      XFLK   (NPFLKA) = XBEAM
      YFLK   (NPFLKA) = YBEAM
      ZFLK   (NPFLKA) = ZBEAM
*  Calculate the total kinetic energy of the primaries: don't change
      IF ( ILOFLK (NPFLKA) .EQ. -2 .OR. ILOFLK (NPFLKA) .GT. 100000 )
     &   THEN
         TKESUM = TKESUM + TKEFLK (NPFLKA) * WTFLK (NPFLKA)
      ELSE IF ( ILOFLK (NPFLKA) .NE. 0 ) THEN
         TKESUM = TKESUM + ( TKEFLK (NPFLKA) + AMDISC (ILOFLK(NPFLKA)) )
     &          * WTFLK (NPFLKA)
      ELSE
         TKESUM = TKESUM + TKEFLK (NPFLKA) * WTFLK (NPFLKA)
      END IF
      RADDLY (NPFLKA) = ZERZER
*  Here we ask for the region number of the hitting point.
*     NREG (NPFLKA) = ...
*  The following line makes the starting region search much more
*  robust if particles are starting very close to a boundary:
      CALL GEOCRS ( TXFLK (NPFLKA), TYFLK (NPFLKA), TZFLK (NPFLKA) )
      CALL GEOREG ( XFLK  (NPFLKA), YFLK  (NPFLKA), ZFLK  (NPFLKA),
     &              NRGFLK(NPFLKA), IDISC )
*  Do not change these cards:
      CALL GEOHSM ( NHSPNT (NPFLKA), 1, -11, MLATTC )
      NLATTC (NPFLKA) = MLATTC
      CMPATH (NPFLKA) = ZERZER
      CALL SOEVSV
      RETURN
*=== End of subroutine Source =========================================*
      END


