Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Elimination of Numerical Cherenkov Instability in flowing-plasma
  Particle-In-Cell simulations by using Galilean coordinates   Particle-In-Cell (PIC) simulations of relativistic flowing plasmas are of key
interest to several fields of physics (including e.g. laser-wakefield
acceleration, when viewed in a Lorentz-boosted frame), but remain sometimes
infeasible due to the well-known numerical Cherenkov instability (NCI). In this
article, we show that, for a plasma drifting at a uniform relativistic
velocity, the NCI can be eliminated by simply integrating the PIC equations in
Galilean coordinates that follow the plasma (also sometimes known as comoving
coordinates) within a spectral analytical framework. The elimination of the NCI
is verified empirically and confirmed by a theoretical analysis of the
instability. Moreover, it is shown that this method is applicable both to
Cartesian geometry and to cylindrical geometry with azimuthal Fourier
decomposition.

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The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph