Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laboratory model of magnetosphere created by strong plasma perturbation
  with frozen-in magnetic field   Transient interaction of magnetic dipole with plasma flow carrying southward
magnetic field is studied in laboratory experiment. The flow with transverse
frozen-in field is generated by means of laser-produced plasma cross-field
expansion into background plasma which fills vacuum chamber along externally
applied magnetic field prior to interaction. Probe measurements showed that at
realized plasma parameters effective collisionless Larmor coupling takes place
resulting in formation of strong compressive perturbation which propagates in
background with super-Alfvenic velocity and generates in laboratory frame
transverse electric field comparable in value to expected induction one.
Compression pulse with southward field after short propagation interacts with
dipole and creates well defined magnetosphere. Comparison of magnetospheres
created by laser-produced plasma expanding in vacuum field and in magnetized
background revealed fundamental differences in structure and behavior of
electric potential in plasma. In presence of frozen-in southward field direct
{\guillemotleft}sub-solar{\guillemotright} penetration of outside electric
potential deep inside of magnetosphere was observed taking place with velocity
close to upstream Alfven speed.

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The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph