Fast Reconnection and Self-Organization in Laboratory and Astrophysical Plasmas

Physics – Plasma Physics

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Scientific paper

I will discuss fast and impulsive reconnection phenomena that are common to laboratory as well as a wide range of space and astrophysical plasmas. These self-organization phenomena are characterized not only by a fast growth rate, but also by a sudden change in the time-derivative of the growth rate. Examples of such phenomena are sawtooth oscillations in toroidal plasmas, magnetospheric substorms, and solar/stellar flares. Recent developments in the theory and high-resolution simulations (incorporating Adaptive Mesh Refinement) of reconnection phenomena in such plasmas have brought us closer to understanding several significant features of observations. In the process, we have also identified mechanisms that not only enhance but inhibit fast reconnection. I will discuss the successes and failures of the theory, and discuss open questions that can be resolved by a combination of laboratory diagnostics, in situ satellite measurements, and solar/stellar observations.

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