Ion Dynamics and Wave Properties of Shock Ripples: MMS Observations
Abstract
In space, collisionless shocks act to slow down and thermalize plasma and are efficient particle accelerators. In astrophysical plasmas, shocks are likely the source of high-energy cosmic rays. Shock rippling is a type of non-stationarity where where kinetic-scale waves move along the front of the shock. Rippling in shocks can have an impact on particle heating and acceleration processes. High time-resolution field and particle measurements from the four closely-spaced Magnetospheric Multiscale (MMS) spacecraft allow us to resolve processes at the Earth's quasi-perpendicular bow shock at kinetic scales. We in detail describe the dispersive properties and the source instability of the shock ripples. We also characterise the role of shock rippling in ion reflection and acceleration at the shock.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2017
- Bibcode:
- 2017AGUFMSH53B..07J
- Keywords:
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- 7829 Kinetic waves and instabilities;
- SPACE PLASMA PHYSICS;
- 7845 Particle acceleration;
- SPACE PLASMA PHYSICS;
- 7851 Shock waves;
- SPACE PLASMA PHYSICS;
- 7867 Wave/particle interactions;
- SPACE PLASMA PHYSICS