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Janus modes of Hasegawa plasma waves in a streaming and tempestuous plasma pillar

Title
Janus modes of Hasegawa plasma waves in a streaming and tempestuous plasma pillar
Author
이명재
Keywords
TEST CHARGE; SURFACE-WAVES; QUANTUM; INSTABILITY; POTENTIALS
Issue Date
2017-12
Publisher
AMER INST PHYSICS
Citation
PHYSICS OF PLASMAS, v. 24, no. 12, Article no. 122111
Abstract
Janus modes of the damping and growing of Hasegawa plasma waves are studied in a plasma pillar containing the dissipation and the beam energy deposition caused by tempestuous electrons and streaming ions. We find that the Janus modes split into the upper-and the lower-modes. For the upper-mode, the imaginary part of the wave frequency is negative for any parameters so that the corresponding Hasegawa space-charge plasma wave is always damped away. We found that the damping rate of the upper-mode decreases with a reduction of the pillar radius and a raising of the degree of the harmonic-roots. However, for the lower-mode, called lower-Janus mode, the wave can be either damped away or growing, depending on the wave number, streaming velocity, and geometric factor. The lower-Janus mode can be a pure growing wave with a reduction of the pillar radius. Interestingly, this growing mode turns to damping as the wave number decreases.
URI
https://aip.scitation.org/doi/10.1063/1.5008455http://repository.hanyang.ac.kr/handle/20.500.11754/116657
ISSN
1070-664X; 1089-7674
DOI
10.1063/1.5008455
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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