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Excitation of geodesic acoustic mode continuum by drift wave turbulence

Published online by Cambridge University Press:  13 June 2012

JUN YU ,
J. Q. DONG ,
X. X. LI ,
D. DU  and
X. Y. GONG
JUN YU
Affiliation:
School of Mathematics and Physics, University of South China, Hengyang, Hunan Province 421001, P. R. China
J. Q. DONG
Affiliation:
Institute for Fusion Theory and Simulation, Department of Physics, Zhejiang University, Hangzhou 310027, P. R. China Southwestern Institute of Physics, P.O. Box 432, Chengdu, P. R. China
X. X. LI
Affiliation:
School of Nuclear Science and Technology, University of South China, Hengyang, Hunan Province 421001, P. R. China ([email protected])
D. DU
Affiliation:
School of Mathematics and Physics, University of South China, Hengyang, Hunan Province 421001, P. R. China
X. Y. GONG
Affiliation:
School of Nuclear Science and Technology, University of South China, Hengyang, Hunan Province 421001, P. R. China ([email protected])
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Abstract

Excitation of the geodesic acoustic mode continuum by drift wave turbulence is studied using the wave kinetic approach. For a model profile of weak non-uniform ion temperature, the forms of growth rate and radial structure of geodesic acoustic modes are obtained analytically. The growth rate is analyzed for several conditions for present-day tokamaks and compared with that for uniform ion temperature, as well as that given by the coherent mode approach for non-uniform ion temperature.

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Issue 6 , December 2012 , pp. 651 - 655
Copyright
Copyright © Cambridge University Press 2012

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References

Chakrabarti, N., Singh, R., Kaw, P. K. and Guzdar, P. N. 2007 Nonlinear excitation of geodesic acoustic mode by drift waves. Phys. Plasmas 14, 1–6 (052308).CrossRefGoogle Scholar
Chen, L., Lin, Z. and White, R. B. 2000 Excitation of zonal flow by drift waves in toroidal plasmas. Phys. Plasmas 7, 3129–3132.CrossRefGoogle Scholar
Chen, L. and Zonca, F. 1995 Theory of shear alfvê waves in toroidal plasmas. Phys. Scr. T60, 81–90.CrossRefGoogle Scholar
Diamond, P. H.et al. 2005 Zonal flow in plasma-a review. Plasma Phys. Control Fusion 47, R35CR161.CrossRefGoogle Scholar
Guzdar, P. N.et al. 2009 Nonlocal analysis of the excitation of the geodesic acoustic mode by drift waves. Phys. Plasma 16, 1–7 (052514).CrossRefGoogle Scholar
Lin, Z., Hahm, T. S., Lee, W. W., Tang, W. M. and White, R. B. 1998 Turbulent transport reduction by zonal flows: massively parallel simulations. Science 281, 1835–1837.CrossRefGoogle ScholarPubMed
Mckee, G. R.et al. 2003 Experimental characterization of coherent, radially sheared zonal flows in DIII-D tokamak Phys. Plasmas 10, 1712–1719.CrossRefGoogle Scholar
Wang, L. and Hahm, T. S. 2009 Theory of fine-scale zonal flow generation from trapped electron mode turbulence. Phys. Plasma 16, 1–7 (082302).CrossRefGoogle Scholar
Winsor, N., Johnson, J. L. and Dawson, J. M. 1968 Geodesic acoustic waves in hydrodynamic systems. Phys. Fluids 11, 2448–2450.CrossRefGoogle Scholar
Xu, G. S., Wan, B. N., Song, M. and Li, J. G. 2003 Direct measurement of poloidal long-wavelength E × B flows in the HT-7 tokamak. Phys. Rev. Lett. 91, 1–4(125001).CrossRefGoogle Scholar
Yu, M. Y. 1977 Solitary electrostatic ion cyclotron waves. J. Plasma Phys. 18, 139–143.CrossRefGoogle Scholar
Yu, J. and Dong, J. Q. 2010 Parametric excitation of geodesic acoustic mode continuum by drift waves. Phys. Scr. 82, 1–4 (045504).CrossRefGoogle Scholar
Yu, M. Y., Shukla, P. K. and Spatschek, K. H. 2009 Nonlinear propagation of lower-hybrid waves in an inhomogeneous plasma. J. Plasma Phys. 20, 189–203.CrossRefGoogle Scholar
Zhao, K. J.et al. 2006 Toroidal symmetry of geodesic acoustic mode zonal flow in a tokamak plasma. Phys. Rev. Lett. 96, 1–4 (255004).CrossRefGoogle Scholar
Zonca, F. and Chen, L. 2008 Radial structures and nonlinear excitation of geodesic acoustic modes Europhys. Lett. 83, p1–p6 (35001).CrossRefGoogle Scholar