Neoclassical transport induced by ICRF (ion-cyclotron range of frequencies) in the collisional regime

Conference · Fri Sep 01 04:00:00 EDT 1989

OSTI ID:5591565

Chiu, S. C.; Chan, V. S.

From the gyrokinetic equations, a quasilinear equation can be derived with rf effects included in the quasilinear operator. From this, generalized moment equations can be deduced in the guiding center approximation. Of particular interest is the parallel momentum equation which drives the neoclassical transport. The parallel rf forces which can be due to nonresonant or resonant ponderomotive forces are quite different between electrons and ions so that an electrostatic electric field is established. This electric field can influence transport near the plasma edge. We estimate the neoclassical particle and energy fluxes in the Pfirsch-Schlueter regime appropriate for the edge region. Since rf can generate asymmetric momentum and heat sources, it changes the transport in rf heated plasmas and also offers the possibility of externally controlling the density and confinement properties of a tokamak plasma. These effects are discussed in terms of antenna near fields and power requirements. Effects on limiter and divertor discharges will be discussed. 15 refs., 1 fig.

• Research Organization: General Atomics Co., San Diego, CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-89ER53277
• OSTI ID: 5591565
• Report Number(s): GA-A-19826; CONF-8910225--1; ON: DE90000755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
CLOSED PLASMA DEVICES
COLLISIONAL PLASMA
DIVERTORS
HEAT FLUX
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
LIMITERS
NEOCLASSICAL TRANSPORT THEORY
PLASMA
PLASMA HEATING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT THEORY