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Magnetic Reconnection

9 September 2022

At https://phys.org/news/2022-09-scientists-reveal-magnetic-reconnection-trigger.html … the mainstream view is that magnetic reconnection drives the production of solar filaments that produce coronal mass ejections. Not necessarily so it would seem. Or not entirely so. Understanding how filaments erupt by observation as well as by simulation is necessary. It is thought eruptions are triggered by magnetic reconnection but the details are rarely spelt out. They are not generally elaborated on and are merely assumed as no better idea has occurred to them. Li Leping of the Chinese Academy of Sciences has published in the Astrophysical Journal [August 2022] his idea on the mechanisms involved, derived from observation of a filament on the Sun back in April of 2021. At the end points of the filament, a long curving arc of electro-magnetism, magnetic fields appeared and reconnected with the filament, forming a revised filament complete with loops. AQ current sheet, as in electricity, reputedly appeared at the interface of the filament. Bright plasmoids found in the current sheet, propagated along it. This indicates the presence of plasmoid instabilities during the reconnection process, on the face of the sun. The newly reconnected filament duly erupted. However, unreconnected parts of the filament remained stable – which would mean the filament only partially erupted. A big part of the filament remained unconnected, in fact. This suggests, according to Li, that reconnection of energy fields near the filament cannot result in an eruption of the whole filament. Something else is going on.

At https://phys.org/news/2022-09-key-advance-physics-enable-super-efficient.html … a key advance in physics may enable super efficient electrical generation of power.

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