Formation of SCR energy spectra during stochastic acceleration with allowance for Coulomb losses |
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Authors: | V M Ostryakov Yu Yu Kartavykh G A Koval'tsov |
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Institution: | (1) St. Petersburg State Technical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251, Russia;(2) Ioffe Physicotechnical Institute, Russian Academy of Sciences, ul. Politekhnicheskaya 26, St. Petersburg, 194021, Russia |
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Abstract: | The stochastic acceleration of heavy ions by Alfvén turbulence is considered with allowance for Coulomb losses. The pattern of energy dependence of these losses gives rise to characteristic features in the energy spectra of the accelerated particles at energies of the order of several MeV nucleon?1. The manifestation of these features in the spectra is sensitive to the temperature and density of the medium, which can serve as a basis for plasma diagnostics in the flare region. Some impulsive solar energetic particle events during which features in the spectra of 3He and 4He were observed are considered as an example. |
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