The MEFISTO and WPT Electric Field Sensors of the Plasma Wave Investigation on the BepiColombo Mio Spacecraft Measurements of Low and High Frequency Electric Fields at Mercury
| Autor: | Pierre Henri, Hirotsugu Kojima, Keigo Ishisaka, K. Lappalainen, Esa Kallio, Yasumasa Kasaba, S.-E. Jansson, Bjørn Lybekk, Michiko Morooka, Anders Eriksson, L. Åhlén, Lars Bylander, Atsushi Kumamoto, W. Puccio, Tomas Karlsson, Jan-Erik Wahlund |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Spacecraft potential
Electric fields 010504 meteorology & atmospheric sciences Wire Probe Antenna (WPT) Acoustics BepiColombo Magnetosphere 7. Clean energy 01 natural sciences law.invention Fusion plasma och rymdfysik law Electric field 0103 physical sciences Electron density and temperature Dipole antenna 010303 astronomy & astrophysics 0105 earth and related environmental sciences Physics Spacecraft business.industry Waves in plasmas MEFISTO Astronomy and Astrophysics Plasma Fusion Plasma and Space Physics Mio Plasma waves Plasma Wave Investigation (PWI) Mercury Magnetospheric Orbiter (MMO) Space and Planetary Science Physics::Space Physics Orbit insertion business Radio wave |
| ISSN: | 0038-6308 |
| Popis: | This paper describes the design of MEFISTO (Mercury Electric Field In-Situ Tool) and WPT (Wire Probe Antenna) electric field sensors for Plasma Wave Investigation (PWI) on the BepiColombo Mio spacecraft (Mercury Magnetospheric Orbiter, MMO). The two sensors will enable the first observations of electric fields, plasma waves and radio waves in and around the Hermean magnetosphere and exosphere. MEFISTO and WPT are dipole antennas with 31.6 m tip-to-tip length. Each antenna element has a spherical probe at each end of the wire (15 m length). They are extended orthogonally in the spin plane of the spacecraft and enable measurements of the electric field in the frequency range of DC to 10 MHz by the connection to two sets of receivers, EWO for a lower frequency range and SORBET for higher frequencies. In the initial operations after the launch (20 Oct. 2018), we succeeded to confirm the health of both antennas and to release the launch lock of the WPT. After Mercury orbit insertion planned at the end of 2025, both sensors will be fully deployed and activate full operations of the PWI electric field measurements. |
| Databáze: | OpenAIRE |
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