Laboratory solar flare experiments

Details Laboratory solar flare experiments Laboratory solar flare experiments

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...47..331b&link_type=abstract

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

Physics

19

Lines Of Force, Magnetic Field Configurations, Solar Flares, Solar Simulation, Current Density, Energy Distribution, Energy Sources, Ion Acoustic Waves, Magnetic Measurement, Scaling Laws

Scientific paper

Several laboratory experiments on magnetic field line reconnection are briefly reviewed. Emphasis is placed on the double inverse pinch device (DIPD) in which magnetic flux is built up during a quiescent reconnection phase and then abruptly transferred during an impulsive reconnection phase. Scaling estimates show that this impulsive phase corresponds to a solar release of (10 to the 30th power) ergs in 100 seconds with the production of GeV potentials. The trigger for the impulsive 'flare' is a conduction mode instability (ion-acoustic) which abruptly changes the resistance of the neutral point region when the reconnection current density reaches a critical value. Some results are presented from a flat plate reconnection device which has exactly antiparallel fields at the boundaries and develops one x-type neutral point rather than tearing into many neutral points. The reconnection rate is more quiescent than in the DIPD. A mild conduction mode instability occurs. The results suggest that regions with 'flattened' boundary fields may not be as conducive to flares as regions with more curved fields.

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