Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm31a1711o&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM31A-1711
Astronomy and Astrophysics
Astrophysics
2723 Magnetic Reconnection (7526, 7835), 7519 Flares
Scientific paper
We will present an experimental study of the dynamics of half-toroidal plasma arcs relevant to solar coronal activities utilizing the existing MRX facility [1,2]. A set of electrodes are inserted in MRX to generate a variety of plasma flux loops which contain variable toroidal guide field. Three dimensional evolution of the simulated flares is monitored by an ultra fast framing camera. The time evolution of discharges with Argon, Helium and Hydrogen with currents of 5-15 kA show the stability condition for a line-tied plasma flux loop similar to those on the solar surface. With the initial data it is shown that the q value, which describes the rotational transform of field lines, is the key for characterizing the global stability. Our experimental results will contribute to the understanding of evolution of magnetic topology of the solar flare including concepts such as current sheets, stability of current carrying flares, and line-tying, which are vitally important for understanding the Solar/Heliospheric and Interplanetary Environment. [1] M. Yamada, H. Ji, S. Hsu, T. Carter, R. Kulsrud, N. Bretz, F. Jobes, Y. Ono, and F. Perkins. Study of driven magnetic reconnection in a laboratory plasma. Phys. Plasmas, 4:1936, 1997. [2] V.S. Titov and P. D'emoulin. Basic topology of twisted magnetic configurations in solar flares. Astron.and Astrophys., 351:707, 1999.
Dorfman S.
Ji Hantao
McGeehan B.
Oz E.
Yamada Mitsuru
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