| Original Articles |
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Effect of Elongation on Critical Gradient for Toroidal Electron Temperature Gradient Modes |
| PENG Li-Li, GAO Zhe |
| Department of Engineering Physics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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PENG Li-Li, GAO Zhe 2008 Chin. Phys. Lett. 25 4065-4067 |
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Abstract The electron temperature gradient mode is investigated in elongated toroidal plasmas with a gyrokinetic integral eigenmode equation code. Dependence of the critical electron temperature gradient on the elongation is calculated. It is found that when the elongation increases, the growth rate spectrum is greatly shifted towards shorter poloidal wavelength, and then the poloidal wavenumber at which the mode is destabilizing critically in elongated plasmas will be larger than that in circular plasmas.
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| Keywords:
52.35.-g
52.35.Kt
52.35.Qz
52.55.-s
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Received: 07 April 2008
Published: 25 October 2008
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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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