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Direct observation of ion cyclotron damping of turbulence in Earth’s magnetosheath plasma

Author

Listed:
  • A. S. Afshari

    (University of Iowa)

  • G. G. Howes

    (University of Iowa)

  • J. R. Shuster

    (Institute for the Study of Earth, Oceans, and Space and University of New Hampshire)

  • K. G. Klein

    (Lunar and Planetary Laboratory)

  • D. McGinnis

    (University of Iowa)

  • M. M. Martinović

    (Lunar and Planetary Laboratory)

  • S. A. Boardsen

    (NASA Goddard Space Flight Center
    University of Maryland)

  • C. R. Brown

    (University of Iowa)

  • R. Huang

    (University of Iowa)

  • D. P. Hartley

    (University of Iowa)

  • C. A. Kletzing

    (University of Iowa)

Abstract

Plasma turbulence plays a key role in space and astrophysical plasma systems, enabling the energy of magnetic fields and plasma flows to be transported to particle kinetic scales at which the turbulence dissipates and heats the plasma. Identifying the physical mechanisms responsible for the dissipation of the turbulent energy is a critical step in developing the predictive capability for the turbulent heating needed by global models. In this work, spacecraft measurements of the electromagnetic fields and ion velocity distributions by the Magnetospheric Multiscale (MMS) mission are used to generate velocity-space signatures that identify ion cyclotron damping in Earth’s turbulent magnetosheath, in agreement with analytical modeling. Furthermore, the rate of ion energization is directly quantified and combined with a previous analysis of the electron energization to identify the dominant channels of turbulent dissipation and determine the partitioning of energy among species in this interval.

Suggested Citation

  • A. S. Afshari & G. G. Howes & J. R. Shuster & K. G. Klein & D. McGinnis & M. M. Martinović & S. A. Boardsen & C. R. Brown & R. Huang & D. P. Hartley & C. A. Kletzing, 2024. "Direct observation of ion cyclotron damping of turbulence in Earth’s magnetosheath plasma," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52125-8
    DOI: 10.1038/s41467-024-52125-8
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    References listed on IDEAS

    as
    1. E. Lichko & J. Egedal, 2020. "Magnetic pumping model for energizing superthermal particles applied to observations of the Earth's bow shock," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    2. C. H. K. Chen & K. G. Klein & G. G. Howes, 2019. "Evidence for electron Landau damping in space plasma turbulence," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
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