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

Technical Report · Mon Feb 14 23:00:00 EST 2000

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

Lin, Z ^[1]; Hahm, T S; Lee, W W; Tang, W M; White, R B

---

1. Princeton Plasma Physics Laboratory

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., Princeton, NJ (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 751257
• Report Number(s): PPPL--3437
• Country of Publication: United States
• Language: English

Related Subjects

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