Gyrokinetic water-bag modeling of a plasma column: Magnetic moment distribution and finite Larmor radius effects

Klein, R.; Gravier, E.; Morel, P.; Besse, N.; Bertrand, P.
August 2009
Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p082106
Academic Journal
Describing turbulent transport in fusion plasmas is a major concern in magnetic confinement fusion. It is now widely known that kinetic and fluid descriptions can lead to significantly different properties. Although more accurate, the kinetic calculation of turbulent transport is much more demanding of computer resources than fluid simulations. An alternative approach is based on a water-bag representation of the distribution function that is not an approximation but rather a special class of initial conditions, allowing one to reduce the full kinetic Vlasov equation into a set of hydrodynamics equations while keeping its kinetic character [P. Morel, E. Gravier, N. Besse et al., Phys. Plasmas 14, 112109 (2007)]. In this paper, the water-bag concept is used in a gyrokinetic context to study finite Larmor radius effects with the possibility of using the full Larmor radius distribution instead of an averaged Larmor radius. The resulting model is used to study the ion temperature gradient (ITG) instability.


Related Articles

  • Pitch-angle diffusion of ions via nonresonant interaction with Alfvénic turbulence. Yoon, P. H.; Wang, C. B.; Wu, C. S. // Physics of Plasmas;Oct2009, Vol. 16 Issue 10, p102102 

    The present discussion revisits the problem of nonresonant heating of ions by Alfvénic turbulence. It is shown that in the limit of weak Alfvénic turbulence it is appropriate to describe the nonresonant heating of protons as perpendicular pseudoheating. However, in a more general situation...

  • Initial Report On The Transition to Turbulence in a Magnetized Plasma Column. Burin, M.J.; Tynan, G.R.; N.A.3Crocker // AIP Conference Proceedings;2003, Vol. 676 Issue 1, p207 

    Plasma density fluctuations are being investigated experimentally in CSDX, a magnetized plasma column. We show that an effective Reynolds number of the plasma is directly proportional to axial magnetic field strength B and inversely proportional to the ion-neutral collsion frequency, which in...

  • Plasma transport and turbulence in the Helimak: Simulation and experiment. Li, B.; Rogers, B. N.; Ricci, P.; Gentle, K. W. // Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p082510 

    The Helimak experiment produces a toroidal plasma with a helical magnetic field. A simulation-experiment comparison of turbulence in this device is presented, focusing on parameter regimes in which the turbulence is dominated by interchange modes with k∥≃0. The numerical simulations...

  • Flow of a two-fluid plasma carrying a pulsed current in a steady-state magnetic field. Ostrovskaya, G. V. // Technical Physics;Nov2008, Vol. 53 Issue 11, p1391 

    The problem of the motion of plasma carrying a pulsed current in a steady-state magnetic field is solved in terms of two-fluid magnetohydrodynamics. The initial directions of the force and current vectors are determined, and the relations that determine their time evolution are obtained. The...

  • Current drive via magnetohydrodynamic helicity waves in a nonuniform plasma. Mett, Richard R.; Tataronis, John A. // Physics of Fluids B: Plasma Physics;Oct90, Vol. 2 Issue 10, p2334 

    Fundamentals of low-frequency current drive produced by a packet of arbitrarily polarized nonlinear Alfvén waves in an incompressible plasma with an inhomogeneous equilibrium magnetic field and aligned fluid velocity are explored. Analysis of the equations of magnetohydrodynamics with...

  • A solvable self-similar model of the sausage instability in a resistive Z pinch. Lampe, Martin // Physics of Fluids B: Plasma Physics;Jul91, Vol. 3 Issue 7, p1521 

    A solvable model is developed for the linearized sausage mode within the context of resistive magnetohydrodynamics. The model is based on the assumption that the fluid motion of the plasma is self-similar, as well as several assumptions pertinent to the limit of wavelength long compared to the...

  • Low-Frequency Structural Plasma Turbulence in the L-2M Stellarator. Batanov, G.M.; Bening, V.E.; Korolev, V. Yu.; Petrov, A.E.; Pshenichnikov, A.A.; Sarksyan, K.A.; Skvortsova, N.N.; Kharchev, N.K.; Kholnov, Yu. V. // JETP Letters;10/25/2003, Vol. 78 Issue 8, p502 

    Experiments on the L-2M stellarator have shown the occurrence of steady-state low-frequency strong structural (LFSS) turbulence throughout the entire plasma column. A key feature of LFSS turbulence is the presence of stochastic plasma structures. It is shown that different types of LFSS...

  • Structure and motion of edge turbulence in the National Spherical Torus Experiment and Alcator C-Mod. Zweben, S. J.; Maqueda, R. J.; Terry, J. L.; Munsat, T.; Myra, J. R.; D'Ippolito, D.; Russell, D. A.; Krommes, J. A.; LeBlanc, B.; Stoltzfus-Dueck, T.; Stotler, D. P.; Williams, K. M.; Bush, C. E.; Maingi, R.; Grulke, O.; Sabbagh, S. A.; White, A. E. // Physics of Plasmas;May2006, Vol. 13 Issue 5, p057103 

    In this paper we compare the structure and motion of edge turbulence observed in L-mode vs. H-mode plasmas in the National Spherical Torus Experiment (NSTX) [M. Ono, M. G. Bell, R. E. Bell et al., Plasma Phys. Controlled Fusion 45, A335 (2003)]. The radial and poloidal correlation lengths are...

  • Large-eddy simulation of magnetohydrodynamic turbulence in compressible fluid. Chernyshov, A. A.; Karelsky, K. V.; Petrosyan, A. S. // Physics of Plasmas;Mar2006, Vol. 13 Issue 3, p032304 

    In the present article, the large eddy simulation (LES) technique for the study of compressible magnetohydrodynamic turbulence is developed. The filtered equations of magnetohydrodynamics of compressible fluid are obtained with the use of a mass-weighted filtering procedure (Favre filtering)....


Read the Article


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

Try another library?
Sign out of this library

Other Topics