Initialises Galactic Cosmic Ray or Solar Particle Event calculations See also SPECSOURWHAT(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 shellsWHAT(2)= not usedWHAT(3)= not usedWHAT(4)= Earth radius (Defaultprovided)WHAT(5)= Earth equatorial magnetic field (Defaultprovided)WHAT(6)= not usedSDUM= 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 settingWHAT(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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