Global sound modes in mirror traps with anisotropic pressure

Journal Article · Tue Oct 15 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4827265· OSTI ID:22218515

Skovorodin, D. I.; Zaytsev, K. V.; Beklemishev, A. D. ^[1]

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1. Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk 630090 (Russian Federation)

Global oscillations of inhomogeneous plasma with frequencies close to the bounce frequency of ions in mirror traps have been studied. It has been shown that, in some cases, the sound can be reflected from the axial plasma inhomogeneity. The ideal magnetohydrodynamic (MHD) model with Chew-Goldberger-Low approximation has been utilized to determine conditions of existence of the standing waves in the mirror-confined plasma. Linearized wave equation for the longitudinal plasma oscillations in thin anisotropic inhomogeneous plasma with finite β has been derived. The wave equation has been treated numerically. The oscillations are studied for the case of the trap with partially filled loss-cone and the trap with sloshing ions. It has been shown that in cells of the multiple-mirror trap standing waves can exist. The frequency of the wave is of the order of the mean bounce-frequency of ions. In the trap with sloshing ions, the mode supported by the pressure of fast ions could exist. The results of oscillations observation in the experiment on the Gas Dynamic Trap have been presented.

• OSTI ID: 22218515
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANISOTROPY
APPROXIMATIONS
HYDROMAGNETIC WAVES
INHOMOGENEOUS PLASMA
ION ACOUSTIC WAVES
IONS
LOSS CONE
MAGNETIC MIRRORS
MAGNETOHYDRODYNAMICS
NUMERICAL ANALYSIS
OSCILLATIONS
PLASMA PRESSURE
SOUND WAVES
STANDING WAVES
TRAPS
WAVE EQUATIONS