Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flat bubble regime and laminar plasma flow in a plasma wake field
  accelerator   A simple 2D model of the bubble formation in a plasma wakefield accelerator
is developed and investigated. It is shown that in the case of a flat driver
the bubble may consist of two parts that correspond to two different types of
the plasma flow: a laminar flow where plasma electron streams do not cross and
a two-stream (turbulent) flow. The laminar flow turns out to be robust to the
symmetry breaking. Building-of of the developed model we demonstrate that in
the case of the laminar flow and non-relativistic plasma electrons the
transverse wake field is absent inside the bubble even in the case of a
transversely nonuniform plasma.

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The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org