GCR-SPE

Initialises Galactic Cosmic Ray or Solar Particle Event calculations

See also SPECSOUR

     WHAT(1) = i0 + 1000 * i1
               i0 = 0: centered dipole field, geomagnetic coordinates
                       (used also for computing rigidity cut-off's
                        in the spectrum generating routine)
                  = 1: exact multipole fields, geographic coordinates
                  = 2: undefined, standard MAGFLD user routine called for
                       regions with magnetic field
                  = 3: dipolar field for infinite plane at given latitude
                  > 3: undefined, standard MAGFLD user routine called for
                       regions with magnetic field
               i1 = number of atmospheric shells (see Note 2)
                  = 10000: no atmospheric shells
                  = 51 :  50 atmospheric shells (not supported)
                  = 101: 100 atmospheric shells
                  = 201: 200 atmospheric shells (not supported)
               Default: centered dipole field, 100 shells

     WHAT(2) = not used

     WHAT(3) = not used

     WHAT(4) = Earth radius (Default provided)

     WHAT(5) = Earth equatorial magnetic field (Default provided)

     WHAT(6) = not used

     SDUM =    name identifying both the spectra files (estension .spc) 
               and the data file (estension .sur) produced  by the 
               auxiliary program atmloc_2011.f  (see Note 2).

     Default (command GCR-SPE not given): no GCR/SPE calculation.

Notes:

1) Cosmic ray calculations, initialised by GCR-SPE, are defined by means of command SPECSOUR and a number of auxiliary programs. Details are presented in Chap. (16)

2) The cards for the geometry description of the atmospheric shells must be prepared using the auxiliary programs and datacards in the directory $FLUPRO/gcrtools. Program Atmloc_2011.f writes a file atmloc.geo, containing the geometry input to be inserted into the FLUKA input file (or to be read by setting WHAT(3) GEOBEGIN card), a file atmlocmat.cards containing the extra material assignments, and a file atmloc.sur containing auxiliary data and the scoring areas. The user shall rename the file atmloc.sur to <xxxxxxx>.sur, where <xxxxxx> is an identifier of exactly 7 characters which must appear also in the input spectra file names: the spectra must have the names <zz><xxxxxxx>.spc, where <zz> is the atomic number of the primary. The example spectra distributed with FLUKA come with two identifiers: <zz>phi0465 for solar minimum and <zz>phi1440 for solar maximum, and with zz=01-28.

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