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Short Wavelength Ion Temperature Gradient Driven Instability in Noncircular Flux Surface Plasmas with Finite Aspect Ratio |
| WANG Ying;GAO Zhe |
| Department of Engineering Physics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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WANG Ying, GAO Zhe 2006 Chin. Phys. Lett. 23 2151-2154 |
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Abstract By employing the local equilibrium of shaped tokamak plasmas, a gyrokinetic model with integral eigenmode equations is developed to investigate effects of the finite aspect ratio and noncircular flux surface on short wavelength ion temperature gradient (SWITG) driven modes. It is found that when nonadiabatic electron and trapped particle effects are not considered, the SWITG mode can be stabilized by finite aspect ratio A, elongation k and triangularity δ, and can be destabilized by the Shafranov shift gradient ∂R0/∂r.
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| Keywords:
52.35.-g
52.35.Kt
52.35.Qz
52.55.-s
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Published: 01 August 2006
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| PACS: |
52.35.-g
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(Waves, oscillations, and instabilities in plasmas and intense beams)
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52.35.Kt
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(Drift waves)
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52.35.Qz
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(Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.))
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52.55.-s
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(Magnetic confinement and equilibrium)
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