| Original Articles |
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Pressure Driven Magnetohydrodynamics Instabilities in Peaked
Pressure Profile Reversed Magnetic Shear Plasmas
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| GAO Qing-Di;ZHANG Jin-Hua;QU Hong-Peng |
| Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041 |
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| Cite this article: |
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GAO Qing-Di, ZHANG Jin-Hua, QU Hong-Peng 2001 Chin. Phys. Lett. 18 790-792 |
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Abstract For a reversed magnetic shear plasma formed by early neutral beam injection into the HL-2A tokamak, magnetohydrodynamics instability analysis against ideal low-n modes and resistive interchange modes is carried out. Low-n modes located in the low shear region around the shear reversal point are driven unstably by large pressure gradient, and they are of the characteristics of infernal modes. High pressure in the central negative shear region drives resistive interchange modes with the unstable window extending to r/a ≈ 0.2, but not covering the low shear region around the shear reversal point.
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| Keywords:
52.35.Py
52.55.Fa
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Published: 01 June 2001
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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.Fa
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(Tokamaks, spherical tokamaks)
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