Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ion acoustic instability of the rotating cylindrical helicon
  discharge plasma   The kinetic theory for the cylindrical plasma, produced by the cylindrically
symmetric (azimuthal mode number m=0) helicon wave, is developed with
accounting for the cylindrical geometry and the radial inhomogeneity of the
helicon wave and plasma. This theory reveals macroscale effect of the azimuthal
steady rotation of electrons with a radially inhomogeneous angular velocity,
caused by radial inhomogeneity of the helicon electric field. It is found that
this sheared rotation as well as the electron density and temperature
inhomogeneity are responsible for the development of the high frequency ion
acoustic instability of the inhomogeneous cylindrical plasma. This instability
is spatially localized in the region of strong gradients of the helicon wave
electric field and of the plasma density, where it is more stronger than the
parametric instabilities driven by the oscillating motion of the electrons
relative to ions in the helicon wave.

23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph