Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solitary versus Shock Wave Acceleration in Laser-Plasma Interactions   The excitation of nonlinear electrostatic waves, such as shock and solitons,
by ultraintense laser interaction with overdense plasmas and related ion
acceleration are investigated by numerical simulations. Stability of solitons
and formation of shock waves is strongly dependent on the velocity distribution
of ions. Monoenergetic components in ion spectra are produced by "pulsed"
reflection from solitary waves. Possible relevance to recent experiments on
"shock acceleration" is discussed.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph