Other
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh51b06h&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH51B-06
Other
7513 Coronal Mass Ejections, 7831 Laboratory Studies
Scientific paper
Solar prominence eruptions have been simulated in the laboratory using a magnetized plasma gun. Physical parameters of the laboratory prominences are scaled so that the physics of real solar prominences is reproduced. High-speed cameras show that the plasmas resemble actual solar prominences, and evolve in a reproducible sequence. Eruption speed can be slowed or completely inhibited by a larger scale vacuum magnetic field that straps the prominence down. A new generation of the experiment has the capability of forming two side-by-side prominences that interact with each other. The interaction has been studied using high-speed cameras, and is different in the co-helicity and counter-helicity cases. In the co-helicity case, the parallel toroidal currents cause the prominences to attract and partly merge. Helicity is transferred from one prominence to the other, causing the prominence receiving excess helicity to erupt sooner and faster. In the counter-helicity case, the reconnection region between the prominences can be observed visually by the cameras. The destruction of toroidal magnetic flux associated with the reconnection can be readily inferred from the images. Other new results include a regime where wave-like patterns appear in the plasma, as well as a topology where the characteristic S-shapes (sigmoids) are more pronounced.
Bellan Paolo
Hansen John Freddy
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