Electrostatic analysis of the tokamak edge plasma

Technical Report · Wed Jul 01 00:00:00 EDT 1981

DOI:https://doi.org/10.2172/6309883· OSTI ID:6309883

Motley, R W

The intrusion of an equipotential poloidal limiter into the edge plasma of a circular tokamak discharge distorts the axisymmetry in two ways: (1) it (partially) shorts out the top-to-bottom Pfirsch-Schlueter driving potentials, and (2) it creates zones of back current flow into the limiter. The resulting boundary mismatch between the outer layers and the inner axisymmetric Pfirsch-Schlueter layer provides free energy to drive the edge plasma unstable. Special limiters are proposed to symmetrize the edge plasma and thereby reduce the electrical and MHD activity in the boundary layer.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AM02-76CH03073
• OSTI ID: 6309883
• Report Number(s): PPPL-1799; ON: DE81027517; TRN: 81-014728
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA SHEATH
ANALYTICAL SOLUTION
TOKAMAK DEVICES
BOUNDARY LAYERS
LIMITERS
MAGNETOHYDRODYNAMICS
PFIRSCH-SCHLUETER REGIME
CLOSED PLASMA DEVICES
FLUID MECHANICS
HYDRODYNAMICS
LAYERS
MECHANICS
THERMONUCLEAR DEVICES
700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)