Excitation of internal kink mode by barely trapped suprathermal electrons

Journal Article · Thu Sep 15 00:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2044467· OSTI ID:20764536

Youwen, Sun; Baonian, Wan; Shaojie, Wang; Deng, Zhou; Liqun, Hu; Biao, Shen ^[1]

---

1. Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, China 230031 (China)

The barely trapped suprathermal electrons can destabilize the internal kink mode when their density gradient is positive within the rational surface and the beta value of the suprathermal electrons exceeds a threshold value. With the assumption of two different models of energy distribution of the suprathermal electrons, the threshold beta value of the barely trapped suprathermal electrons, the real frequency, and the growth rate of the internal kink mode are found in this paper. The results are in reasonable agreement with the recent experimental observations on DIII-D tokamak [K. L. Wong, M. S. Chu, T. C. Luce et al., Phys. Rev. Lett. 85, 996 (2000)].

• OSTI ID: 20764536
• Journal Information: Physics of Plasmas, Vol. 12, Issue 9; Other Information: DOI: 10.1063/1.2044467; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DOUBLET-3 DEVICE
ELECTRONS
ENERGY SPECTRA
EXCITATION
KINK INSTABILITY
MAGNETIC CONFINEMENT
MODE RATIONAL SURFACES
PLASMA
PLASMA DENSITY
TRAPPING