Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of wakefields excited by an off-axis drive bunch in a
  plasma-dielectric waveguide   A linear theory of a wakefield excitation in a plasma-dielectric accelerating
structure by a drive electron bunch in the case of an off-axis bunch injection
has been constructed. The structure under investigation is a round
dielectric-loaded metal waveguide with a channel for the charged particles,
filled with homogeneous cold plasma. Derived theory was used to investigate
numerically the spatial distribution of the bunch-excited wakefield components,
which act on both the drive and witness bunches.

35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex