Kinetic and electromagnetic transport processes in toroidal devices

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6357402

Moses, R W; Schoenberg, K F

A brief review of transport processes in toroidal devices is presented. Particular attention is given to radial transport of power by the Poynting's vector and kinetic electron flow. This work is primarily focused on the Reversed Field Pinch (RFP) which holds the added complexity of a dynamo process that sustains poloidal current in the edge region, where the toroidal field is reversed. The experimental observation of superthermal unidirectional electrons in the plasma edge of ZT-40M and HBTX1C is noted, and the rapid, nonclassical ion heating in RFPs is taken account of. Radial transport parallel to fluctuating magnetic field lines is deemed a likely candidate for both electromagnetic and kinetic energy transport. Two models are discussed and compared. It is concluded that electromagnetic transport using a local Ohm's law best describes nonclassical ion heating, and the transport of kinetic energy by long mean free path electrons best represents the half-Maxwellian of electrons observed in the edge of several RFPs. A nonlocal Ohm's law is essential for the kinetic electron model. 18 refs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6357402
• Report Number(s): LA-UR-90-3589; CONF-9010230--7; ON: DE91001901
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
CHARGED-PARTICLE TRANSPORT
CLOSED PLASMA DEVICES
DISTRIBUTION FUNCTIONS
FUNCTIONS
HBTX DEVICES
NEUTRAL-PARTICLE TRANSPORT
OHM LAW
PHOTON TRANSPORT
PINCH DEVICES
PINCH EFFECT
POYNTING THEOREM
RADIATION TRANSPORT
REVERSE-FIELD PINCH
THERMONUCLEAR DEVICES
TOROIDAL PINCH DEVICES
TOROIDAL SCREW PINCH DEVICES
TRANSPORT THEORY
ZT-40 DEVICES