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  • 1
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    Kinetic Evidence of Magnetic Reconnection Due to Kelvin-Helmholtz Waves (2016)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Kelvin-Helmholtz (ICH) instability at the Earth's magnetopause is predominantly excited during northward interplanetary magnetic field (IMF). Magnetic reconnection due to KH waves has been suggested as one of the mechanisms to transfer solar wind plasma into the magnetosphere. We investigate KH waves observed at the magnetopause by the Magnetospheric Multlscale (MMS) mission; in particular, we study the trailing edges of KH waves with Alfvenic ion jets. We observe gradual mixing of magnetospheric and magnetosheath ions at the boundary layer. The magnetospheric electrons with energy up to 80 keV are observed on the magnetosheath side of the jets, which indicates that they escape into the magnetosheath through reconnected magnetic field lines. At the same time, the low-energy (below 100eV) magnetosheath electrons enter the magnetosphere and are heated in the field-aligned direction at the high-density edge of the jets. Our observations provide unambiguous kinetic evidence for ongoing reconnection due to KH waves.
    Keywords: Space Sciences (General)
    Type: GSFC-E-DAA-TN41314 , Geophysical Research Letters (ISSN 0094-8276) (e-ISSN 1944-8007); 43; 11; 5635–5643
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Turbulence Heating ObserveR: - Satellite Mission Proposal (2016)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Universe is permeated by hot, turbulent, magnetized plasmas. Turbulent plasma is a major constituent of active galactic nuclei, supernova remnants, the intergalactic and interstellar medium, the solar corona, the solar wind and the Earths magnetosphere, just to mention a few examples. Energy dissipation of turbulent fluctuations plays a key role in plasma heating and energization, yet we still do not understand the underlying physical mechanisms involved. THOR is a mission designed to answer the questions of how turbulent plasma is heated and particles accelerated, how the dissipated energy is partitioned and how dissipation operates in different regimes of turbulence. THOR is a single-spacecraft mission with an orbit tuned to maximize data return from regions in near-Earth space magnetosheath, shock, foreshock and pristine solar wind featuring different kinds of turbulence. Here we summarize the THOR proposal submitted on 15 January 2015 to the Call for a Medium-size mission opportunity in ESAs Science Programme for a launch in 2025 (M4). THOR has been selected by European Space Agency (ESA) for the study phase.
    Keywords: Space Sciences (General)
    Type: GSFC-E-DAA-TN42985 , Journal of Plasma Physics (ISSN 0022-3778) (e-ISSN 1469-7807); 82; 5; 905820501
    Format: text
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    NASA TECHNICAL REPORTS
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