Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cherenkov Radiation from a Hollow Conical Targets: Off-Axis Charge
  Motion   Cherenkov radiation (CR) generated by a charge moving through a hollow
conical target made of dielectric material is analyzed. We consider two cases:
the charge moves from the base of the cone to its top (``straight'' cone) or
from the top to the base (``inverted'' cone). Unlike previous papers, a nonzero
shift of the charge trajectory from the symmetry axis is taken into account
which leads to generation of asymmetric CR. The most interesting effect is the
phenomenon of ``Cherenkov spotlight'' which has been reported earlier for
axially symmetric problems. This effect allows essential enhancement of the CR
intensity in the far-field region by proper selection of the target's
parameters and charge velocity. Here we describe the influence of charge shift
on CR far-field patterns paying the main attention to the ``Cherenkov
spotlight'' regime. Influence of variation of the charge speed on this
phenomenon is also investigated.

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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
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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: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg