Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Design of a Plasma Accelerator Based on Effects of Energy/Momentum
  Exchange in Crossed Magnetic Fields   The creation and design of a plasma thruster are considered using a rotating
cylindrical plasma flow in crossed magnetic fields. The thruster scheme uses
this plasma guided by a permanent, radial and a time-dependent axial magnetic
field. Namely, the acceleration effect is formed by the azimuthal electric
field which comes about as a variation of an external, axial magnetic flux.
Besides, it is possible to go beyond the approach of quasi-neutrality. These
processes can lead to the generation of a local azimuthal time-dependent
electric field which may also accelerate the rotation of the electron and ion
fluids in different directions. Furthermore, estimations of this device and the
plasma flow demonstrate additional thrust effects as well as can consume
interplanetary medium as a fuel for driving plasma thrust.

18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci