Other
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.348..237h&link_type=abstract
In ESA, Proceedings of the First SOHO Workshop: Coronal Streamers, Coronal Loops, and Coronal and Solar Wind Composition p 237-2
Other
5
Coronal Loops, Electron Beams, Hydrodynamic Equations, Solar Flares, Solar Radiation, Computer Programs, Energy Distribution, Heating, Mathematical Models, Time Dependence
Scientific paper
Using a one dimensional hybrid code, a response of the flare loop atmosphere to a series of very short electron beam pulses with subsecond duration is evaluated. Loop dynamics and energy balance are treated by solving the standard set of hydrodynamic equations, while the beam deceleration in denser atmospheric layers is evaluated by using a particle simulation technique. Ionization of hydrogen below T approximately equal to 10,000K is obtained by solving simultaneously the time dependent non LTE problem for a three level hydrogen atom with continuum. The resulting electron densities are then used to compute radiation losses at each time step. The behavior of time dependent heating, the ionization structure of the chromosphere, and the role of relaxation processes are discussed. A series of short duration electron beam pulses represents schematically the nonstationary heating in the flare loops. However, the time dependent radiation hydrodynamical approach used can also be applied to study other processes taking place in coronal loops.
Heinzel Petr
Karlicky Marian
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