The HION module can produce two types of output. The first is the
standard output of the quc arrays in the .full and
.end files, holding the level populations. This is all that is
needed to restart a computation. The second (optional) output is a
HION specific output system that generates files in UIO format after a
prescribed number of simulation timesteps or alternatively after a
prescribed time interval (see parameter dtime_out_hion).
Output
after a fixed number of timesteps is mainly useful for debugging.
The files are named HION.aaaa.bb.cccc.out with
aaaa either 'step' or
'time', indicating output after a fixed number of timesteps or a fixed
amount of solar time, bb the
atom identifier and cccc the number of the output file, e.g.
HION.step.H.0001.out.
The HION files can be read with the IDL
uio_dataset_rd ('filename') function. The resulting data
structure contains mass density, gas temperature, electron density of
the atmosphere, as well as the axes in the atmos substructure.
The atom substructure contains the time-dependent populations
ntd, the LTE populations nstar, the total population
ntot, a number of atomic parameters and l_ntr and
c_ntr, arrays of the z-index per column where the radiation
temperature in a transition starts to deviate from the gas
temperature.
Refer to Leenaarts & Wedemeyer-Böhm (2005) for more details.