Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extraordinary Drift Wave in Space and Cylindrically Bounded Heavy Ion
  Plasmas   It is pointed out that electrostatic and electromagnetic waves propagating in
perpendicular direction to the density gradient $\nabla n_0=\hat{x}
|\frac{dn_0}{dx}|$ and external magnetic field $\vec{B}_0=B_0 \hat{z}$ in
hybrid frequency range $\Omega_i \ll \omega \ll \Omega_e$ (where
$\Omega_j=\frac{eB_0}{m_j c}$ and $j=e,i$) have several applications in space
and laboratory plasmas. The electron plasma waves are important for the future
experiments on heavier ion plasmas as well as the results are applicable to the
experiments performed to create pure pair ion fullerene plasmas. The
electrostatic modes are shown to exist in upper F-region of terrestrial
ionosphere and electromagnetic waves are applied to cylindrically bounded heavy
ion plasmas.

21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat