Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Linear unstable whistler eigenmodes excited by a finite electron beam   Electron beam-generated whistler waves are widely found in the Earth's space
plasma environment and are intricately involved in a number of phenomena. Here
we study the linear growth of whistler eigenmodes excited by a finite gyrating
electron beam, to facilitate the interpretation of relevant experiments on
beam-generated whistler waves in the Large Plasma Device at UCLA. A linear
instability analysis for an infinite gyrating beam is first performed. It is
shown that whistler waves are excited through a combination of cyclotron
resonance, Landau resonance and anomalous cyclotron resonance, consistent with
our experimental results. By matching the whistler eigenmodes inside and
outside the beam at the boundary, a linear growth rate is obtained for each
wave mode and the corresponding mode structure is constructed. These eigenmodes
peak near the beam boundary, leak out of the beam region and decay to zero far
away from the beam.

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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
32
The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph