TITLE

Electromagnetic geodesic acoustic modes in tokamak plasmas

AUTHOR(S)
Deng Zhou
PUB. DATE
October 2007
SOURCE
Physics of Plasmas;Oct2007, Vol. 14 Issue 10, p104502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The drift kinetic equation is solved for investigation of the plasma response to electromagnetic geodesic acoustic modes. The plasma flow within magnetic surfaces is considered. A perpendicular magnetic perturbation with poloidal number m=2 is created due to the m=2 parallel return current.
ACCESSION #
27370828

 

Related Articles

  • Spectral features of the geodesic acoustic mode and its interaction with turbulence in a tokamak plasma. Lan, T.; Liu, A. D.; Yu, C. X.; Yan, L. W.; Hong, W. Y.; Zhao, K. J.; Dong, J. Q.; Qian, J.; Cheng, J.; Yu, D. L.; Yang, Q. W. // Physics of Plasmas;May2008, Vol. 15 Issue 5, p056105 

    The three-dimensional wavenumber and frequency spectrum for the geodesic acoustic mode (GAM) has been measured in the HuanLiuqi-2A tokamak for the first time. The spectrum provides definite evidence for the GAM, which is characterized by kθ=k[lowercase_phi_synonym]=0 and...

  • Toroidal flow and radial particle flux in tokamak plasmas. Callen, J. D.; Cole, A. J.; Hegna, C. C. // Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p082504 

    Many effects influence toroidal flow evolution in tokamak plasmas. Momentum sources and radial plasma transport due to collisional processes and microturbulence-induced anomalous transport are usually considered. In addition, toroidal flow can be affected by nonaxisymmetric magnetic fields;...

  • Extension of geodesic acoustic mode theory to helical systems. Watari, T.; Hamada, Y.; Fujisawa, A.; Toi, K.; Itoh, K. // Physics of Plasmas;Jun2005, Vol. 12 Issue 6, p062304 

    The present paper extends the theory of geodesic acoustic mode (GAM) oscillation, which so far has been applied to tokamaks, to helical systems. By using drift kinetic equations for three-dimensional equilibriums, a generalized dispersion relation is obtained including Landau damping. The...

  • Drift effects on electromagnetic geodesic acoustic modes. Sgalla, R. J. F. // Physics of Plasmas;2015, Vol. 22 Issue 2, p1 

    A two fluid model with parallel viscosity is employed to derive the dispersion relation for electromagnetic geodesic acoustic modes (GAMs) in the presence of drift (diamagnetic) effects. Concerning the influence of the electron dynamics on the high frequency GAM, it is shown that the frequency...

  • Global two-fluid turbulence simulations of L-H transitions and edge localized mode dynamics in the COMPASS-D tokamak. Thyagaraja, A.; Valovič, M.; Knight, P. J. // Physics of Plasmas;Apr2010, Vol. 17 Issue 4, p042507 

    It is shown that the transition from L-mode to H-mode regimes in tokamaks can be reproduced using a two-fluid, fully electromagnetic, plasma model when a suitable particle sink is added at the edge. Such a model is implemented in the CUTIE code [A. Thyagaraja et al., Eur. J. Mech. B/Fluids 23,...

  • Splitting of the m=n=1 modes in hybrids with qmin<1. Marchenko, V. S.; Reznik, S. N. // Physics of Plasmas;Aug2010, Vol. 17 Issue 8, p084503 

    The frequency splitting between m=n=1 eigenmodes in tokamak discharges with two q=1 surfaces and sheared toroidal rotation has been calculated. The instability domain of the “doublet” in the parameter space has been established for the first time. The results are consistent with...

  • Full-Wave Studies of Lower Hybrid Wave Propagation in Tokamaks. Bonoli, P. T.; Wright, J. C.; Richardson, A. S.; Schmidt, A. E.; Phillips, C. K.; Valeo, E. // AIP Conference Proceedings;11/26/2009, Vol. 1187 Issue 1, p359 

    A full-wave electromagnetic field solver valid the lower hybrid range of frequencies (LHRF) has been developed that utilizes a semi-spectral representation for the RF electric field. Spurious numerical behavior of the field solver that was found to be related to the inclusion of finite electron...

  • Asymmetric radiation-induced toroidal flow and improved confinement in tokamaks. Singh, R.; Kaw, P. K.; Rogister, A. L.; Tangri, V. // Physics of Plasmas;Apr2006, Vol. 13 Issue 4, p042505 

    The role of impurity radiation in influencing the toroidal flow and radial electric fields (parameters critical for determining turbulent transport) has been studied on the edge of a tokamak plasma. It is demonstrated for the first time that the impurities distributed in an asymmetric...

  • Extension and comparison of neoclassical models for poloidal rotation in tokamaks. Stacey, W. M. // Physics of Plasmas;Jan2008, Vol. 15 Issue 1, p012501 

    Several neoclassical models for the calculation of poloidal rotation in tokamaks were rederived within a common framework, extended to include additional physics and numerically compared. The importance of new physics phenomena not usually included in poloidal rotation calculations (e.g.,...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics