On flares, substorms, and the theory of impulsive flux transfer events

Details On flares, substorms, and the theory of impulsive flux transfer events On flares, substorms, and the theory of impulsive flux transfer events

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...47..345b&link_type=abstract

(NASA, IAU, IUGG, and International Council of Scientific Unions, Workshop on Flare Build-up, Falmouth, Mass., Sept. 8-11, 1975.

Physics

9

Energy Transfer, Magnetic Flux, Magnetic Storms, Solar Flares, Geomagnetism, Lines Of Force, Magnetic Field Configurations, Magnetoresistivity

Scientific paper

Solar flares and magnetospheric substorms are discussed in the context of a general theory of impulsive flux transfer events (IFTE). IFTE theory, derived from laboratory observations in the Double Inverse Pinch Device (DIPD), provides a quantitative extension of 'neutral sheet' theories to include nonsteady field line reconnection. Current flow along the reconnection line increases with magnetic flux storage. When flux build-up exceeds the level corresponding to a critical limit on the current, instabilities induce a sudden transition in the mode of conduction. The resulting IFTE, indifferent to the specific modes and instabilities involved, is the more energetic, the lower the initial resistivity. It is the more violent, the greater the resulting resistivity increase and the faster its growth. Violent events can develop very large voltage transients along the reconnection line. Persistent build-up promoting conditions produce relaxation oscillations in the quantity of flux and energy stored (build-up-IFTE cycles). It is difficult to avoid the conclusion: flares and substorms are examples of IFTE.

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