Gyrokinetic simulation of turbulence driven geodesic acoustic modes in edge plasmas of HL-2A tokamak

Liu, Feng; Lin, Z.; Dong, J. Q.; Zhao, K. J.
November 2010
Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p112318
Academic Journal
Strong correlation between high frequency microturbulence and low frequency geodesic acoustic mode (GAM) has been observed in the edge plasmas of the HL-2A tokamak, suggesting possible GAM generation via three wave coupling with turbulence, which is in turn modulated by the GAM. In this work, we use the gyrokinetic toroidal code to study the linear and nonlinear development of the drift instabilities, as well as the generation of the GAM (and low frequency zonal flows) and its interaction with the turbulence for realistic parameters in the edge plasmas of the HL-2A tokamak for the first time. The simulation results indicate that the unstable drift wave drives strong turbulence in the edge plasma of HL-2A. In addition, the generation of the GAM and its interaction with the turbulence are all observed in the nonlinear simulation. The simulation results are in reasonable agreement with the experimental observations.


Related Articles

  • Synergistic cross-scale coupling of turbulence in a tokamak plasma. Howard, N. T.; Holland, C.; White, A. E.; Greenwald, M.; Candy, J. // Physics of Plasmas;2014, Vol. 21 Issue 11, p1 

    For the first time, nonlinear gyrokinetic simulations spanning both the ion and electron spatiotemporal scales have been performed with realistic electron mass ratio ((mD/me)1/2 = 60.0), realis-tic geometry, and all experimental inputs, demonstrating the coexistence and synergy of ion (kθps ~...

  • Particle-in-cell simulation with Vlasov ions and drift kinetic electrons. Chen, Yang; Parker, Scott E. // Physics of Plasmas;May2009, Vol. 16 Issue 5, p052305 

    There are certain limitations in using gyrokinetic ions for simulations of turbulent transport in tokamak plasmas. Applications where Vlasov ions might be more appropriate include the electron temperature gradient driven turbulence, edge turbulence with steep density gradient, and magnetic...

  • Turbulence in Hall MHD Plasmas. Shaikh, Dastgeer; Shukla, P. K. // AIP Conference Proceedings;12/14/2010, Vol. 1306 Issue 1, p160 

    The Hall MHD description of magnetized plasma is invoked in many space, laboratory and astrophysical plasmas when the characteristic frequency is bigger than the ion cyclotron frequency where the MHD description is inapplicable. In this paper, we present fully self consistent 3D simulations of...

  • Gyrokinetic simulations of mesoscale energetic particle-driven Alfvénic turbulent transport embedded in microturbulence. Bass, E. M.; Waltz, R. E. // Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p112319 

    Energetic particle (EP) transport from local high-n toroidal Alfvén eigenmodes (TAEs) and energetic particle modes (EPMs) is simulated with a gyrokinetic code. Linear and nonlinear simulations have identified a parameter range where the longwave TAE and EPM are unstable alongside the...

  • Nonlinear quasisteady state benchmark of global gyrokinetic codes. Lapillonne, X.; McMillan, B. F.; Görler, T.; Brunner, S.; Dannert, T.; Jenko, F.; Merz, F.; Villard, L. // Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p112321 

    Two global gyrokinetic codes are benchmarked against each other by comparing simulation results in the case of ion temperature gradient driven turbulence, in the adiabatic electron response limit. The two codes are the Eulerian code GENE and the Lagrangian particle-in-cell code ORB5 which solve...

  • Role of core toroidal rotation on the H-mode radial electric field shear, turbulence, and... La Haye, R.J.; Rettig, C.L.; Groebner, R.J.; Hyatt, A.W.; Scoville, J.T. // Physics of Plasmas;Feb94, Vol. 1 Issue 2, p373 

    Discusses the use of 'magnetic braking' of the plasma toroidal rotation in the high confinement mode by applied resonant, low static error fields in DIII-D as an independent control to evaluate the stabilization of microturbulence in the plasma core. Dominance of the radial electric field and...

  • Intermittency in tokamak edge turbulence: An artifact of kurtosis analysis. Sethia, Gautam C.; Reddy, D. Chenna // Physics of Plasmas;Jun95, Vol. 2 Issue 6, p1989 

    Presents a kurtosis-based statistical analysis on the reported first measurement of intermittency in tokamak edge turbulence using density and potential fluctuation data. Finding that most of the density datasets and all the potential datasets exhibit a significant peak in their autospectra at...

  • Quantitative predictions of tokamak energy confinement from first-principles simulations with... Kotschenreuther, M.; Dorland, W.; Beer, M.A.; Hammett, G.W. // Physics of Plasmas;Jun95, Vol. 2 Issue 6, p2381 

    Presents a first-principles model of anomalous thermal transport based on numerical simulations, with stringent comparisons to experimental data from the Tokamak Fusion Test Reactor. Prediction of the fluctuation and thermal transport characteristics of torodial ion-temperature-gradient-driven...

  • Global numerical study of electron temperature gradient-driven turbulence and transport scaling. Labit, B.; Ottaviani, M. // Physics of Plasmas;Jan2003, Vol. 10 Issue 1, p126 

    A three-dimensional, electromagnetic, fluid code with flux boundaries conditions is used to study the scaling of electron thermal transport caused by electron temperature gradient-driven (ETG) turbulence. It is found that close to the ETG threshold, the thermal transport depends weakly on β,...


Read the Article


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

Try another library?
Sign out of this library

Other Topics