FLUMIC
(Flux Model for Internal Charging)
gives an appropriate severe internal charging environment for use in internal
charging assessments. This model is integral to the DICTAT internal charging
tool but may be applied separately. FLUMIC describes the electron flux, which
has an exponential dependence on energy E and varies with L, time of year and
phase of the solar cycle. FLUMIC version 1 and 2 covered L-shells above 2,8,
i.e. the outer belt only. The exponential spectrum were derived from flux
measurements of electron with energy higher than 1 MeV. It can a priori be
extrapolated down to lower energy (say a few 100 keV), although for more
dynamics lower energy environment more sophisticated models are used. Version 2
is currently implemented via DICTAT on the SPENVIS web service. Recently,
version 3 has been created. This is broadly similar to FLUMIC version 2 in the
outer belt because it is based on the same data. However, it also models electron
fluxes in the inner belt.