The dependence of solar modulation on the sign of the cosmic ray particle charge

Details The dependence of solar modulation on the sign of the cosmic ray particle charge The dependence of solar modulation on the sign of the cosmic ray particle charge

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....4..497g&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 4 p 497-500 (SEE N85-34729 23-92)

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Balloon Sounding, Charged Particles, Current Sheets, Curvature, Electrons, Flux (Rate), Galactic Cosmic Rays, Gradients, Heliosphere, Helium Plasma, Interplanetary Magnetic Fields, Modulation, Rigidity, Time Dependence, Cosmic Ray Showers, Gamma Ray Telescopes, Neutron Counters, Rates (Per Time)

Scientific paper

The solar modulation of galactic cosmic ray helium and electrons at 1 AU, within the 600-1000 MV magnetic rigidity interval, are compared for the period from 1965 through 1984. The time-intensity variations during the two solar maxima around 1970 and 1981 show that after 1970 the helium intensity recovers earlier than that of the electrons, whereas after 1981 the electron intensity recovers earlier than that of helium. The flux ratio of helium to electrons (He/e) undergoes a major increases during the 1969-1971 period and a major decrease during 1979-83. These experimental results can be interpreted as due to a dependence of the solar modulation of galactic cosmic rays on the sign of the particle charge, possibly as a consequence of drifts due to gradients and curvatures in the interplanetary magnetic field. However, the comparison of the shapes of the intensity-time curves of helium and electrons in the period 1970-1981 does not support a major specific prediction of the drift model.

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