| Original Articles |
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Mitigation Effect of Finite Larmor Radius on Rayleigh-Taylor Instability in Z-Pinch Implosions |
| QIU Xiao-Ming;HUANG Lin;JIAN Guang-De |
| Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041
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| Cite this article: |
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QIU Xiao-Ming, HUANG Lin, JIAN Guang-De 2002 Chin. Phys. Lett. 19 217-219 |
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Abstract Based on the framework of magnetohydrodynamic theory, a simple model is proposed to study the mitigation effect of finite Larmor radius on the Rayleigh-Taylor instability in Z-pinch implosions. In this model, taking account of Ti ≥t Te in Z-pinch implosions we believe that the magnetohydrodynamic plasma responds to a perturbation (～ exp[i( k .x - ωt)]) at frequency (ω + ik2⊥ρ2iΩi) instead of frequency ω, where k2⊥ρ2i is due to the finite Larmor radius effects expressed from the general kinetic theory of magnetized plasma. Therefore the linearized continuity and momentum equations for the perturbed mass-density and velocity include the finite Larmor radius effects. The calculations indicate that in the wavenumber region of interest the finite Larmor radius effects can mitigate the Rayleigh-Taylor instability in Z-pinch implosions.
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| Keywords:
52.35.Py
52.55.Ez
52.65.Kj
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Published: 01 February 2002
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| PACS: |
52.35.Py
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(Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))
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52.55.Ez
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(Theta pinch)
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52.65.Kj
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(Magnetohydrodynamic and fluid equation)
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