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Excitation of geodesic acoustic mode continuum by drift wave turbulence

  • JUN YU (a1), J. Q. DONG (a2) (a3), X. X. LI (a4), D. DU (a1) and X. Y. GONG (a4)...

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.

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Chakrabarti, N., Singh, R., Kaw, P. K. and Guzdar, P. N. 2007 Nonlinear excitation of geodesic acoustic mode by drift waves. Phys. Plasmas 14, 16 (052308).
Chen, L., Lin, Z. and White, R. B. 2000 Excitation of zonal flow by drift waves in toroidal plasmas. Phys. Plasmas 7, 31293132.
Chen, L. and Zonca, F. 1995 Theory of shear alfvê waves in toroidal plasmas. Phys. Scr. T60, 8190.
Diamond, P. H.et al. 2005 Zonal flow in plasma-a review. Plasma Phys. Control Fusion 47, R35CR161.
Guzdar, P. N.et al. 2009 Nonlocal analysis of the excitation of the geodesic acoustic mode by drift waves. Phys. Plasma 16, 17 (052514).
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, 18351837.
Mckee, G. R.et al. 2003 Experimental characterization of coherent, radially sheared zonal flows in DIII-D tokamak Phys. Plasmas 10, 17121719.
Wang, L. and Hahm, T. S. 2009 Theory of fine-scale zonal flow generation from trapped electron mode turbulence. Phys. Plasma 16, 17 (082302).
Winsor, N., Johnson, J. L. and Dawson, J. M. 1968 Geodesic acoustic waves in hydrodynamic systems. Phys. Fluids 11, 24482450.
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, 14(125001).
Yu, M. Y. 1977 Solitary electrostatic ion cyclotron waves. J. Plasma Phys. 18, 139143.
Yu, J. and Dong, J. Q. 2010 Parametric excitation of geodesic acoustic mode continuum by drift waves. Phys. Scr. 82, 14 (045504).
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, 189203.
Zhao, K. J.et al. 2006 Toroidal symmetry of geodesic acoustic mode zonal flow in a tokamak plasma. Phys. Rev. Lett. 96, 14 (255004).
Zonca, F. and Chen, L. 2008 Radial structures and nonlinear excitation of geodesic acoustic modes Europhys. Lett. 83, p1p6 (35001).
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