Solar Modulation of Cosmic Electrons

Details Solar Modulation of Cosmic Electrons Solar Modulation of Cosmic Electrons

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...464..507c&link_type=abstract

Astrophysical Journal v.464, p.507

Astronomy and Astrophysics

Astronomy

49

Cosmic Rays: General, Sun: Solar-Terrestrial Relations, Space Vehicles

Scientific paper

We present new cosmic electron measurements obtained from the MEH electron experiment on the ISEE 3/ICE spacecraft for the period 1990 through early t995, and we discuss these in the context of other data. Charge sign dependence of solar modulation is confirmed at energies as high as 5.8 0eV, but the major reduction of fluxes of these electrons in the 1970s does not seem to be reproduced in the current decade. We also report the first data from AESOP (Anti Electron Sub Orbital Payload), a magnet spectrometer using a ring-dipole permanent magnet and digital optical spark chambers. AESOP flew in a preliminary configuration from Lynn Lake, Canada during the summer of 1994. In this configuration the useful energy range is limited to a narrow band around 1.5 0eV, where we measured an abundance of positrons, relative to all electrons, of 0.32±0.18. A consistent picture of the positron abundance and its time variation may be emerging from the world data set.

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