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- Voshchepynets, A.Swedish Inst Space Phys, Kiruna, Sweden (author)
Ions Accelerated by Sounder-Plasma Interaction as Observed by Mars Express
- Article/chapterEnglish2018
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- AMER GEOPHYSICAL UNION,2018
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- LIBRIS-ID:oai:DiVA.org:uu-372834
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-372834URI
- https://doi.org/10.1029/2018JA025889DOI
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- Language:English
- Summary in:English
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- The ion sensor of the Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) experiment detects accelerated ions during pulses of radio emissions from the powerful topside sounder: the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) onboard Mars Express. Accelerated ions (O-2(+), O+, and lighter ions) are observed in an energy range up to 800 eV when MARSIS transmits at a frequency close to the plasma frequency. Individual observations consist of almost monoenergetic ion beams aligned with the MARSIS antenna or lying in the plane perpendicular to the antenna. The observed ion beams are often accompanied by a small decrease in the electron flux observed by the electron sensor of Analyzer of Space Plasmas and Energetic Atoms 3. Observations indicate that the voltage applied to the antenna causes charging of the spacecraft to several hundreds of volts by the electrons of the ambient plasma. Positively charged ions are accelerated when the spacecraft discharges.
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- Barabash, S.Swedish Inst Space Phys, Kiruna, Sweden (author)
- Ramstad, R.Swedish Inst Space Phys, Kiruna, Sweden (author)
- Holmstrom, M.Swedish Inst Space Phys, Kiruna, Sweden (author)
- Andrews, David J.Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)davan153 (author)
- Nicolaou, G.Swedish Inst Space Phys, Kiruna, Sweden;UCL, Dept Space & Climate Phys, London, England (author)
- Frahm, R. A.Southwest Res Inst, San Antonio, TX USA (author)
- Kopf, A.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA (author)
- Gurnett, D.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA (author)
- Swedish Inst Space Phys, Kiruna, SwedenInstitutet för rymdfysik, Uppsalaavdelningen (creator_code:org_t)
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- In:Journal of Geophysical Research - Space Physics: AMER GEOPHYSICAL UNION123:11, s. 9802-98142169-93802169-9402
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