Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-consistent Seeding of the Interchange Instability in Dipolarization
  Fronts   We report a 3D magnetohydrodynamics simulation that studies the formation of
dipolarization fronts during magnetotail reconnection. The crucial new feature
uncovered in the present 3D simulation is that the process of reconnection
produces flux ropes developing within the reconnection region. These flux ropes
are unstable to the kink mode and introduce a spontaneous structure in the
dawn-dusk direction. The dipolarization fronts forming downstream of
reconnection are strongly affected by the kinking ropes. At the fronts, a
density gradient is present with opposite direction to that of the acceleration
field and leads to an interchange instability. We present evidence for a causal
link where the perturbations of the kinking flux ropes with their natural and
well defined scales drive and select the scales for the interchange mode in the
dipolarization fronts. The results of the simulation are validated against
measured structures observed by the Themis mission.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess