# Geodesic acoustic modes excited by finite beta drift waves

## Related Articles

- Anomalous perturbative transport in tokamaks due to drift-Alfven-wave turbulence. Thoul, Anne A.; Similon, P.L.; Sudan, R.N. // Physics of Plasmas;Mar1994, Vol. 1 Issue 3, p601
Discusses the use of the method developed in Thoul, Similon and Sudan to calculate the anomalous perturbative transport in tokamaks due to drift-alfven-wave turbulence. Importance of electromagnetic effects like the fluttering of the magnetic field lines; Coefficients of the anomalous transport...

- Electromagnetic transport components and sheared flows in drift-AlfvÃ©n turbulence. Naulin, Volker // Physics of Plasmas;Oct2003, Vol. 10 Issue 10, p4016
Results from three-dimensional numerical simulations of drift-AlfvÃ©n turbulence in a toroidal geometry with sheared magnetic field are presented. The simulations show a relation between self-generated poloidal shear flows and magnetic field perturbations. For large values of the plasma Î²...

- Effect of flow damping on drift-tearing magnetic islands in tokamak plasmas. Fitzpatrick, R.; Waelbroeck, F. L. // Physics of Plasmas;Jul2009, Vol. 16 Issue 7, p072507
A systematic fluid theory of nonlinear drift-tearing magnetic island dynamics in a conventional large aspect-ratio low-Î² circular cross-section tokamak plasma is derived from a set of single-helicity reduced neoclassical-magnetohydrodynamical equations which incorporate electron and ion...

- Alpha-particle losses from toroidicity-induced AlfvÃ©n eigenmodes. Part II: Monte Carlo simulations and anomalous alpha-loss processes. Sigmar, D. J.; Hsu, C. T.; White, R.; Cheng, C. Z. // Physics of Fluids B: Plasma Physics;Jun92, Vol. 4 Issue 6, p1506
Fusion-born Î± particles moving parallel to the magnetic field can resonate with toroidal AlfvÃ©n eigenmodes (TAE) leading to anomalous Î±-orbit diffusion across the Î±-loss boundaries in a tokamak. This is analyzed using the Hamiltonian guiding center code orbit in conjunction with the...

- Reynolds stress of localized toroidal modes. Zhang, Y.Z.; Mahajan, S.M. // Physics of Plasmas;Nov95, Vol. 2 Issue 11, p4236
Investigates how the Reynolds stress has been considered as a possible force driving the poloidal flow resulting from the fluctuating slab-model drift waves. Manipulation of averaging the Reynolds stress over the 'microscopic scale'; Localization of the two-dimensional toroidal mode at a...

- Spatiotemporal control and synchronization of flute modes and drift waves in a magnetized plasma column. Brochard, F.; Bonhomme, G.; Gravier, E.; Oldenbürger, S.; Philipp, M. // Physics of Plasmas;May2006, Vol. 13 Issue 5, p052510
An open-loop spatiotemporal synchronization method is applied to flute modes in a cylindrical magnetized plasma. It is demonstrated that synchronization can be achieved only if the exciter signal rotates in the same direction as the propagating mode. Moreover, the efficiency of the...

- The effect of three-dimensional fields on bounce averaged particle drifts in a tokamak. Hegna, C. C. // Physics of Plasmas;2015, Vol. 22 Issue 7, p1
The impact of applied 3D magnetic fields on the bounce-averaged precessional drifts in a tokamak plasma are calculated. Local 3D MHD equilibrium theory is used to construct solutions to the equilibrium equations in the vicinity of a magnetic surface for a large aspect ratio circular tokamak...

- The influence of magnetic fluctuations on collisional drift-wave turbulence. Camargo, Suzana J.; Scott, Bruce D.; Biskamp, Dieter // Physics of Plasmas;Nov96, Vol. 3 Issue 11, p3912
Studies a two-dimensional isothermal collisional drift-wave turbulence model including magnetic fluctuations. Electrostatic collisional drift-waves; Magnetic induction in the parallel force balance for electrons; Reduction of the immediacy of the dissipative coupling between the density and...

- Mean sheared flow and parallel ion motion effects on zonal flow generation in ion-temperature-gradient mode turbulence. Anderson, J.; Kishimoto, Y. // Physics of Plasmas;Oct2006, Vol. 13 Issue 10, p102304
The present work investigates the direct interaction of sheared mean flow with zonal flows (ZFs) and the effect of parallel ion motion on ZF generation in ion-temperature-gradient (ITG) background turbulence. An analytical model for the direct interaction of sheared mean flows with zonal flows...