Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of a high-density plasma in a magnetic field   The paper considers the dynamics of the plasma generated by the
explosive-emission cells of the cathode spot of a vacuum arc in a magnetic
field. It is shown that the expansion of the (high-density) plasma in a
transverse magnetic field may cause asymmetry in the plasma density
distribution at the cathode spot boundary. The asymmetry, in turn, increases
the probability of the ignition of new explosive-emission cells in the region
of a stronger magnetic field in the 'anti-amperian' direction of BxI. The
disturbed plasma density distribution estimated in the MHD approximation is
presented. In addition, the velocity of the 'retrograde' spot motion (ignition
of new explosive-emission cells) in the stronger field region is estimated as a
function of the external magnetic field strength. The velocity estimates (a few
to tens of m/(s T)) are shown to agree with experimental data

37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys