Toroidal gyro-Landau fluid model turbulence simulations in a nonlinear ballooning mode representation with radial modes

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870934· OSTI ID:7112122

Waltz, R E ^[1]; Kerbel, G D; Milovich, J ^[2]

---

1. General Atomics, P.O. Box 85608, San Diego, California 92186-9784 (United States)
2. NERSC at Lawrence Livermore National Laboratory, Livermore California (United States)

The method of Hammett and Perkins [Phys. Rev. Lett. [bold 64], 3019 (1990)] to model Landau damping has been recently applied to the moments of the gyrokinetic equation with curvature drift by Waltz, Dominguez, and Hammett [Phys. Fluids B [bold 4], 3138 (1992)]. The higher moments are truncated in terms of the lower moments (density, parallel velocity, and parallel and perpendicular pressure) by modeling the deviation from a perturbed Maxwellian to fit the kinetic response function at all values of the kinetic parameters: [ital k][sub [parallel]][ital v][sub th]/[omega], [ital b]=([ital k][sub [perpendicular]][rho])[sup 2]/2, and [omega][sub [ital D]]/[omega]. Here the resulting gyro-Landau fluid equations are applied to the simulation of ion temperature gradient (ITG) mode turbulence in toroidal geometry using a novel three-dimensional (3-D) nonlinear ballooning mode representation. The representation is a Fourier transform of a field line following basis ([ital k][sub [ital y]][sup [prime]],[ital k][sub [ital x]][sup [prime]],[ital z][prime]) with periodicity in toroidal and poloidal angles. Particular emphasis is given to the role of nonlinearly generated [ital n]=0 ([ital k][sub [ital y]][sup [prime]] = 0, [ital k][sub [ital x]][sup [prime]] [ne] 0) radial modes'' in stabilizing the transport from the finite-[ital n] ITG ballooning modes. Detailing the parametric dependence of toroidal ITG turbulence is a key result.

• DOE Contract Number: AC03-89ER53277; W-7405-ENG-48
• OSTI ID: 7112122
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:7; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
700350 -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
BALLOONING INSTABILITY
CLOSED PLASMA DEVICES
EQUATIONS
FOURIER ANALYSIS
HELICITY
INSTABILITY
ION TEMPERATURE
KINETIC EQUATIONS
PARTICLE PROPERTIES
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA SIMULATION
SIMULATION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT THEORY
TURBULENCE