Recent observations of soft X-ray nonthermal line broadening and hard X-ray emission in solar flares suggest that the nonthermal broadening is due to plasma turbulence created in the energy release. We develop a model of the impulsive excitation of Alfvén wave turbulence and propose the mechanism for the interruption of spectral energy fluxes in flaring loops. This interruption determines the nonthermal broadening in flares and is important for the selective heating of plasma species and for the acceleration of particles to high energies.
Kinematika i Fizika Nebesnykh Tel Supplement
- Pub Date:
- September 2000