Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of a weak ion collisionality on the dynamics of kinetic
  electrostatic shocks   In strictly collisionless electrostatic shocks, the ion distribution function
can develop discontinuities along phase-space separatrices, due to partial
reflection of the ion population. In this paper, we depart from the strictly
collisionless regime and present a semi-analytical model for weakly collisional
kinetic shocks. The model is used to study the effect of small but finite
collisionalities on electrostatic shocks, and they are found to smooth out
these discontinuities into growing boundary layers. More importantly, ions
diffuse into and accumulate in the previously empty regions of phase space,
and, by upsetting the charge balance, lead to growing downstream oscillations
of the electrostatic potential. We find that the collisional age of the shock
is the more relevant measure of the collisional effects than the
collisionality, where the former can become significant during the lifetime of
the shock, even for weak collisionalities.

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The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs