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The MAVEN Solar Wind Electron Analyzer

Abstract : The MAVEN Solar Wind Electron Analyzer (SWEA) is a symmetric hemispheric electrostatic analyzer with deflectors that is designed to measure the energy and angular distributions of 3-4600-eV electrons in the Mars environment. This energy range is important for impact ionization of planetary atmospheric species, and encompasses the solar wind core and halo populations, shock-energized electrons, auroral electrons, and ionospheric primary photoelectrons. The instrument is mounted at the end of a 1.5-meter boom to provide a clear field of view that spans nearly 80 % of the sky with ∼20° resolution. With an energy resolution of 17 % (Δ E/E), SWEA readily distinguishes electrons of solar wind and ionospheric origin. Combined with a 2-second measurement cadence and on-board real-time pitch angle mapping, SWEA determines magnetic topology with high (∼8-km) spatial resolution, so that local measurements of the plasma and magnetic field can be placed into global context.
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Submitted on : Monday, May 23, 2022 - 10:28:17 AM
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D. L. Mitchell, C. Mazelle, J. -A. Sauvaud, J. -J. Thocaven, J. Rouzaud, et al.. The MAVEN Solar Wind Electron Analyzer. Space Science Reviews, 2016, 200, pp.495-528. ⟨10.1007/s11214-015-0232-1⟩. ⟨insu-03675416⟩



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