Ion-cyclotron instability and electron acceleration in coronal loops

Details Ion-cyclotron instability and electron acceleration in coronal loops Ion-cyclotron instability and electron acceleration in coronal loops

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..143..235l&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 143, no. 2, p. 235-245.

Physics

2

Coronal Loops, Electron Acceleration, Ion Cyclotron Radiation, Magnetohydrodynamic Stability, Solar Electrons, Solar Physics, Magnetic Field Reconnection, Solar Flares

Scientific paper

Quasi-electrostatic electron and ion-cyclotron instabilities are studied. The result indicates that the higher harmonic ion cyclotron instabilities (ICI) can be excited while the fast ions produced from reconnection are injected into a coronal loop. Part of the energetic ions can be dragged out of the magnetic mirror turning points and a negative plasma potential is generated. The plasma potential may directly accelerate the electrons up to the relativistic velocity within a short time. This acceleration is similar to the processes occurring in the magnetic mirror devices of controlled thermonuclear fusion. The spectrum and flux of accelerated electrons have also been obtained. Some observational results during the solar flare might be explained by this acceleration mechanism.

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