Multiple-ion plasma boundaries

Motschmann, U.; Sauer, K.; Roatsch, T.; McKenzie, J. F.

doi:10.1016/0273-1177(91)90013-a

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…In a multi-component plasma these conditions need to be modified (Motschmann et al. 1991b , a ), and the different ion species behave differently. This changes further when kinetic effects are included (Fahr and Siewert 2015 ).…”

Section: Large Scale Structuresmentioning

confidence: 99%

The Plasma Environment of Comet 67P/Churyumov-Gerasimenko

et al. 2022

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The environment of a comet is a fascinating and unique laboratory to study plasma processes and the formation of structures such as shocks and discontinuities from electron scales to ion scales and above. The European Space Agency’s Rosetta mission collected data for more than two years, from the rendezvous with comet 67P/Churyumov-Gerasimenko in August 2014 until the final touch-down of the spacecraft end of September 2016. This escort phase spanned a large arc of the comet’s orbit around the Sun, including its perihelion and corresponding to heliocentric distances between 3.8 AU and 1.24 AU. The length of the active mission together with this span in heliocentric and cometocentric distances make the Rosetta data set unique and much richer than sets obtained with previous cometary probes. Here, we review the results from the Rosetta mission that pertain to the plasma environment. We detail all known sources and losses of the plasma and typical processes within it. The findings from in-situ plasma measurements are complemented by remote observations of emissions from the plasma. Overviews of the methods and instruments used in the study are given as well as a short review of the Rosetta mission. The long duration of the Rosetta mission provides the opportunity to better understand how the importance of these processes changes depending on parameters like the outgassing rate and the solar wind conditions. We discuss how the shape and existence of large scale structures depend on these parameters and how the plasma within different regions of the plasma environment can be characterised. We end with a non-exhaustive list of still open questions, as well as suggestions on how to answer them in the future.

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Section: Large Scale Structuresmentioning

confidence: 99%

The Plasma Environment of Comet 67P/Churyumov-Gerasimenko

et al. 2022

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Phasespace transport of a quasi-neutral multi-fluid plasma over the solar wind MHD termination shock

Fahr

Siewert

Чашей

2012

Astrophys Space Sci

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A simulation study of multiple ion wave generation downstream of lOW Mach number quasiperpendicular shocks

Motschmann

Raeder

1992

Geophysical Research Letters

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The behavior of minor ions just downstream of a low Mach number quasiperpendicular shock is investigated both theoretically and by computer simulations. Because all ions see the same cross shock electric field their deceleration depends on their charge to mass ratio, yielding different downstream velocities. It is shown that these differences in velocity can lead to coherent wave structures in the downstream region of quasiperpendicular shocks with a narrow transition layer. These waves are shown to be multi ion hybrid waves in contrast to mirror waves and ion cyclotron waves. Under favorable conditions these waves should be observable both at interplanetary shocks and at planetary bowshocks.

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Multiple-ion plasma boundaries

Cited by 6 publications

References 9 publications

The Plasma Environment of Comet 67P/Churyumov-Gerasimenko

The Plasma Environment of Comet 67P/Churyumov-Gerasimenko

Phasespace transport of a quasi-neutral multi-fluid plasma over the solar wind MHD termination shock

A simulation study of multiple ion wave generation downstream of lOW Mach number quasiperpendicular shocks

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