Stuttgart 2012 – wissenschaftliches Programm
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SYGP: Symposium Gemeinsame Probleme in Fusions- und astrophysikalischen Plasmen
SYGP 3: Contributed Talks
SYGP 3.4: Vortrag
Montag, 12. März 2012, 17:15–17:30, V55.22
numerical modeling of ion distribution functions in presence of ion-cyclotron waves — •Omar Maj1, 2, Roberto Bilato2, Marco Brambilla2, and Eckart Marsch1 — 1Max-Planck-Institut für Sonnensystemforschung, D-37191 Katlenburg-Lindau, Germany — 2Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany
The kinetic physics of ions in presence of ion-cyclotron (IC) waves constitutes a topic of great interest for both fusion and space plasma physics.
On one hand, IC waves constitute an important heating mechanism in present-day magnetic fusion experiments, and appropriate numerical tools, based on the quasi-linear theory, have been developed for the quantitative description of their resonant interaction with magnetically-confined ions.
On the other hand, in situ measurements of ion distribution functions in the solar wind exhibit the typical signature of resonant interactions with a spectrum of waves at the ion cyclotron frequency. Such IC waves can provide both energy and momentum to the plasma, and, thus, are presently considered one of the main theoretical paradigms to explain the heating of the solar corona to the observed temperature and the acceleration of the solar wind out of the gravitational well of the Sun.
The purpose of this work is to apply numerical modeling tools developed for fusion plasmas to coronal plasmas, with the ultimate goal of understanding how well the quasi-linear theory can account for the observed shape of ion distribution functions.