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Solar Modulation of Cosmic Electrons

1996; IOP Publishing; Volume: 464; Linguagem: Inglês

10.1086/177340

1538-4357

John Clem, David P. Clements, J. A. Esposito, P. A. Evenson, David Miles Huber, J. L’Heureux, Peter Meyer, Christian Constantin,

Photocathodes and Microchannel Plates

view Abstract Citations (79) References (48) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Solar Modulation of Cosmic Electrons Clem, John M. ; Clements, David P. ; Esposito, Joseph ; Evenson, Paul ; Huber, David ; L'Heureux, Jacques ; Meyer, Peter ; Constantin, Christian Abstract 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. Publication: The Astrophysical Journal Pub Date: June 1996 DOI: 10.1086/177340 Bibcode: 1996ApJ...464..507C Keywords: COSMIC RAYS: GENERAL; SUN: SOLAR-TERRESTRIAL RELATIONS; SPACE VEHICLES full text sources ADS |