Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterisitics of the hall current surrounding a magnetized
  filamentary plasma   The hall current in the periphery of a filamentary plasma with the inwardly
directed radial electric field, Er has been investigated experimentally by
utilizing a TPD type dc discharge. When the cusp magnetic filed B$\theta$ is
applied perpendicular to the stationary background magnetic field Bz, the hall
current by the ErxB$\theta$ drift of electrons is induced in the periphery of
the magnetized filamentary plasma.

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The categories of this paper are: hep-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc