GCR-SPE

Summary

Initialises Galactic Cosmic Ray or Solar Particle Event calculations ​

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See also SPECSOUR

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WHAT(1) =

\(i_0 + i_1 \times 1000\), where:

	\(i_0\)	=	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
	\(i_1\)	:	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

(option 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 Special source: cosmic rays ​

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) in the 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.