Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong Terahertz Radiation Generation via Wakefield in Collisional
  Plasma   We show that the transverse component of the wakefield can be produced with
the application of an external magnetic field that generates radiation in the
THz range. For this, we carry out analytical and numerical calculations to
evaluate the components of the wakefield in a realistic situation of
collisional plasma. We observe that the wakefield in the direction of the
external magnetic field is produced, though the components of the wakefield are
observed in the directions parallel and perpendicular to the direction of
propagation of the laser and the magnetic field. Based on the approach of
perturbation technique under quasi-static approximation, a study is made on the
magnitude of emitted radiation pulses from the wakefield for the case of lasers
of super-Gaussian profile. The field of THz radiation is found to be enhanced
when stronger magnetic field is applied; the same is the case for the lasers of
higher index.

2
The categories of this paper are: math
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph