Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Guide Field Effects on the Distribution of Plasmoids in Multiple Scale
  Reconnection   The effects of a finite guide field on the distribution of plasmoids in
high-Lundquist-number current sheets undergoing magnetic reconnection in large
plasmas are investigated with statistical models. Merging of plasmoids is taken
into account either assuming that guide field flux is conserved resulting in
non-force-free profiles in general, or that magnetic helicity is conserved and
Taylor relaxation occurs to convert part of the summed guide field flux into
reconnecting field flux towards minimum energy states resulting in force-free
profiles. It is found that the plasmoid distribution in terms of reconnecting
field flux follows a power law with index 7/4 or 1 depending on whether merger
frequencies are independent of or dependent on their relative velocity to the
outflow speed, respectively. This result is approximately the same for the
force-free and non-force-free models, with non-force-free models exhibiting
indices of 2 and 1 for the same velocity dependencies. Distributions in terms
of guide field flux yield indices of 3/2 for the non-force-free model
regardless of velocity dependence. This is notably distinct from the indices of
11/8 and 1 for the force-free models independent of and dependent on velocity,
respectively. At low guide field fluxes the force-free models exhibit a second
power law index of 1/2 due to non-constant flux growth rates. The velocity
dependent force-free model predicts the production of slightly more rapidly
moving large guide field flux plasmoids which is supported by observational
evidence of flux ropes with strong core fields. Implications are discussed on
particle acceleration via Fermi processes.

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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: bayes-an