Analytic model of electromagnetic ion-cyclotron anisotropy instability

Journal Article · Sun Aug 15 04:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3480101· OSTI ID:21432205

Yoon, P H ^[1]; Seough, J J; Khim, K K; Kim, Hyunnam; Kwon, Hyuck-Jin; Park, Jongsun; Parkh, Sarah; Park, Kyung Sun ^[2]

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1. IPST, University of Maryland, College Park, Maryland 20742-2431 (United States)
2. School of Space Research, Kyung Hee University, 446-701 (Korea, Republic of)

In the present paper, the real frequency and growth rate associated with the electromagnetic ion cyclotron instability driven by temperature anisotropy are analytically modeled on the basis of conjecture and upon comparison with numerical roots of the dispersion relation. The ions are assumed to have an anisotropic distribution function with Maxwellian parallel distribution. Under such an assumption complex roots of the dispersion relation depend only on two dimensionless parameters, namely, the temperature anisotropy factor A=T{sub perpendiculari}/T{sub ||}i-1, where T{sub perpendiculari} and T{sub ||i} are the perpendicular and parallel ion temperatures, respectively, and the parallel ion beta, {beta}=(8{pi}nT{sub i}/B{sup 2}){sup 1/2}, where n and B are the plasma density and magnetic field intensity, respectively. The ion-cyclotron instability is thus heuristically modeled by complex frequency which is parametrically dependent on A and {beta}. The present result constitutes a useful shortcut research tool that may be employed in a wide variety of applications.

• OSTI ID: 21432205
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANISOTROPY
CYCLOTRON INSTABILITY
DISPERSION RELATIONS
DISTRIBUTION FUNCTIONS
FUNCTIONS
INSTABILITY
INSTABILITY GROWTH RATES
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA WAVES