Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ion-cyclotron waves in Solar Coronal Hole   We investigate the effect of the Plume/Interplume Lane (PIPL) structure of
the solar Polar Coronal Hole (PCH) on the propagation characteristics of
ion-cyclotron waves (ICW). The gradients of physical parameters determined by
SOHO and TRACE satellites both parallel and perpendicular to the magnetic field
are considered with the aim of determining how the efficiency of the ICR
process varies along the PIPL structure of PCH. We construct a model based on
the kinetic theory by using quasi-linear approximation. We solve the Vlasov
equation for O VI ions and obtain the dispersion relation of ICW. The resonance
process in the interplume lanes is much more effective than in the plumes,
agreeing with the observations which show the source of fast solar wind is
interplume lanes. The solution of the Vlasov equation in PIPL structure of PCH,
the physical parameters of which display gradients along and perpendicular
direction to the external magnetic field, is thus obtained in a more general
form than the previous investigations.

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The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas