Abstract Power-law spectra f(E)∝E −2.7 of < 40 keV suprathermal ions within ∼107 km of propagating interplanetary shocks are explained by diffusive scattering near a plane shock. The theory fits the 25 November 1977 event with a mean free path perpendicular to the shock with is 0.01 AU in front of the shock and less than .0003 AU behind it, for 1 keV ions. The theory predicts a steepening spectrum at higher energies, of the form f(v)∝v−4exp(−ƒλdv/ur) where u = (ΔV)2/2V W depends on the plasma velocity jump ΔV and the plasma speed VW and mean free path λ in front of the shock


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    Title :

    Acceleration theory for 5–40 keV ions at interplanetary shocks


    Contributors:

    Published in:

    Publication date :

    1981-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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