Stochastic Acceleration of Solar Flare Protons.
Abstract
Consider the acceleration of solar flare protons by cyclotron damping of intense Alfven wave turbulence in a magnetic trap. The energy diffusion coefficient D sub EE is computed for a near-isotropic distribution of super-Alfvenic protons and a steady-state solution for the particle spectrum is found for both transit-time and diffusive losses out of the ends of the trap. The acceleration time to a characteristic energy of about 20 Mev/nucl can be as short as 10 sec. From phenomenological arguments one can infer that the Alfven wave spectrum has a 1/omega-squared frequency dependence and that the correlation time of the turbulence lies in the range .0005s < tau sub corr < .05s.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 1978
- Accession Number
- ADA052545
Entities
People
- D. D. Barbosa
Organizations
- Stanford University