Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows

Technical Report · Tue Feb 15 00:00:00 EST 2000

DOI:https://doi.org/10.2172/751257· OSTI ID:751257

Lin, Z; Hahm, T S; Lee, W W; Tang, W M; White, R B

A fully three-dimensional gyrokinetic particle code using magnetic coordinates for general geometry has been developed and applied to the investigation of zonal flows dynamics in toroidal ion-temperature-gradient turbulence. Full torus simulation results support the important conclusion that turbulence-driven zonal flows significantly reduce the turbulent transport. Linear collisionless simulations for damping of an initial poloidal flow perturbation exhibit an asymptotic residual flow. The collisional damping of this residual causes the dependence of ion thermal transport on the ion-ion collision frequency even in regimes where the instabilities are collisionless.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 751257
• Report Number(s): PPPL-3437; TRN: US0000898
• Resource Relation: Other Information: PBD: 15 Feb 2000
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TURBULENCE
ION TEMPERATURE
PLASMA DRIFT
TRANSPORT THEORY
PLASMA SIMULATION
THREE-DIMENSIONAL CALCULATIONS
TEMPERATURE GRADIENTS
DAMPING
PLASMA INSTABILITY