Ion injection and Fermi acceleration at earth's bow shock - The 1984 September 12 event revisited

Details Ion injection and Fermi acceleration at earth's bow shock - The 1984 September 12 event revisited Ion injection and Fermi acceleration at earth's bow shock - The 1984 September 12 event revisited

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..675s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 675-681.

Statistics

34

Interplanetary Medium, Particle Acceleration, Shock Wave Propagation, Solar Corpuscular Radiation, Solar Wind, Ampte (Satellites), Energy Spectra, Ion Injection, Monte Carlo Method

Scientific paper

The injection and acceleration of thermal solar wind ions at the quasi-parallel bow shock are investigated using large-scale self-consistent 1D hybrid simulations. The results show that protons up to 30-50 keV are accelerated at the shock out of the incident thermal solar wind distribution by a more or less coherent mechanism. Ions above about 50 keV are scattered in the upstream region, tuned to the shock, and interact with the shock at least a second time. The model predicts an exponential decrease of the upstream proton intensity with an e-folding distance of about 9 R(E). When upstream particles are included in the hybrid code self-consistently in such a way that sufficient simulation particles are present to give reasonable statistics, the upstream spectra of both protons and alpha particles can be modeled.

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