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\begin{document}

\title{Exploring the evolution of turbulence across a range of terrestrial bow
shock configurations using hybrid simulations}



\author[1]{James Plank}%
\author[1]{Imogen Gingell}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{June 14, 2024}


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\begin{abstract}
Observational investigations of Earth's bow shock have highlighted
distinct variations in turbulence characteristics when comparing
fluctuations in the shock transition with those in the upstream and
downstream plasma regions. To gain a more focused understanding in each
of these areas, we have examined a range of local 2D and 3D hybrid
simulations, using kinetic ions and fluid electrons. Each simulation has
been chosen to cover a range of shock geometries, from quasi-parallel to
quasi-perpendicular and high to low Mach number. In-situ observations,
such as those from the Magnetospheric Multiscale (MMS) mission, are
often unable to fully disentangle spatial and temporal effects. This is
particularly evident in the shock transition and the magnetosheath,
where, for example, whistler waves may have speeds comparable to the
bulk flow and thus locally violate Taylor's hypothesis for kinetic-scale
fluctuations. Simulations overcome these limitations, enabling us to
model the evolution of turbulence in the shock transition and further
downstream. We characterize the turbulent fluctuations using the
following three methods: Firstly, we examine the magnetic spectral
indices spanning the inertial range and extending into the ion range as
they change across the shock. Secondly, we investigate intermittency by
means of the scale-dependent kurtosis. Lastly, we quantify the
correlation lengths as measured across the shock, offering insights into
the physical dimensions of fluctuations at scales smaller than the shock
width. We will discuss the application of these measures to simulations
in understanding the kinetic-scale behaviour of turbulence at Earth's
bow shock.%
\end{abstract}%



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\textbf{NOTE:~}This poster was part of the SH022 Session at AGU Fall
Meeting 2023.

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