Conditions for 'storage' of energetic particles in the solar corona

Details Conditions for 'storage' of energetic particles in the solar corona Conditions for 'storage' of energetic particles in the solar corona

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...208..595w&link_type=abstract

Astrophysical Journal, vol. 208, Sept. 1, 1976, pt. 1, p. 595-608. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

35

Landau Damping, Magnetohydrodynamic Stability, Solar Corona, Solar Electrons, Solar Magnetic Field, Solar Protons, Electron Energy, Solar Cosmic Rays, Solar X-Rays, Wave Attenuation

Scientific paper

Energetic electrons and protons stored on a coronal magnetic loop develop a 'loss-cone' distribution in pitch-angle which is unstable. The particles are lost quickly unless the resulting waves are damped. Under coronal conditions, Landau damping of the waves stabilizes the particles if the field lines are sufficiently curved. Solar cosmic rays (electrons above 0.5 MeV, protons above 4 MeV) may be confined for hours on solar magnetic loops if the field curvature within these loops is roughly 10,000 km. However, the instability quickly destroys any distribution of electrons with unique pitch-angles, such as is invoked for some models of nonthermal X-ray bursts.

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