Increases in the intensity of protons and alpha particles at the front of an interplanetary shock wave

Details Increases in the intensity of protons and alpha particles at the front of an interplanetary shock wave Increases in the intensity of protons and alpha particles at the front of an interplanetary shock wave

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ge%26ae..18....9b&link_type=abstract

(Geomagnetizm i Aeronomiia, vol. 18, Jan.-Feb. 1978, p. 9-13.) Geomagnetism and Aeronomy, vol. 18, Aug. 1978, p. 5-7. Translatio

Physics

1

Alpha Particles, Interplanetary Medium, Shock Fronts, Solar Protons, Inhomogeneity, Mean Free Path, Particle Acceleration, Reflectance, Satellite Observation, Shock Wave Propagation

Scientific paper

Eight cases of increase in the intensity of protons and alpha particles in the energy range 1-4.5 MeV/nucleon were found among Prognoz-satellite observations during 1972-1973. It was found that the ratio of proton to alpha intensities was constant as a rule. The intensity increases are interpreted in a model with decreasing mean free path. Particle acceleration, responsible for the intensity increase, occurs at the shock front; the particles after reflection from the shock front are scattered on inhomogeneities located before the front in the interplanetary medium. As the shock approaches, the effective mean free path of the region where acceleration occurs is reduced.

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