Solar flares and laboratory experiments on magnetic reconnection in current sheaths

Details Solar flares and laboratory experiments on magnetic reconnection in current sheaths Solar flares and laboratory experiments on magnetic reconnection in current sheaths

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984rpspr...2...72b&link_type=abstract

In its USSR Rept.: Space (JPRS-USP-84-005) p 72 (SEE N85-11060 02-12) Transl. into ENGLISH from Pisma V Astron. Z. (Moscow),

Other

Current Sheets, Magnetohydrodynamic Flow, Red Dwarf Stars, Solar Flares, Solar Magnetic Field, Cosmic Plasma, Plasma Conductivity

Scientific paper

Laboratory experiments to model processes in solar flares are described, with special reference to the problem of the dynamics of highly conductive plasma in the vicinity of the particular, especially the zero line of the magnetic field. Approximation modeling is done by comparing the values characterizing the physical conditions in the active clouds of the solar corona and in the atmospheres of flare stars, and in series of laboratory experiments devoted to a study of the formation, stability and explosive disruption of current sheaths in the vicinities of zero lines of the magnetic field. Analysis of plasma flow is based on the relationship of gas kinetic pressure and magnetic pressue, the parameter for nonlinearity, and the Reynolds magnetic number, but disregarding other dissipative process. It is shown that the physical characteristics typical of the preflare situation in the Sun and in stars can be satisfactorily reproduced from the viewpoint of the buildup of magnetic energy, and hence, should correctly reproduce the main physical processes occurring during flares. Thus, there is a qualitative analogy between the main phenomena of explosive disruption of the current sheath in laboratory experiments and the pulse phase of star flares.

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