Spontaneous and driven perpendicular rotation in tokamaks

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860738· OSTI ID:6514078

Hassam, A B; Antonsen, Jr, T M; Drake, J F; Guzdar, P N; Liu, C S; McCarthy, D R; Waelbroeck, F L ^[1]

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1. Laboratory for Plasma Research, University of Maryland, College Park, Maryland 20742 (United States)

Recent theoretical work pertaining to spontaneously generated or forced plasma rotation in tokamaks is discussed. A description of the spontaneous poloidal spin-up of tokamaks from the Stringer effect is given, highlighting the necessary condition of poloidally asymmetric particle accumulation. The possibility of inducing poloidal rotation using the Stringer effect by poloidally asymmetric particle fueling is suggested. The linear theory of [bold E][times][bold B] velocity shear stabilization of tokamak microinstabilities is discussed with an emphasis on the general features of the theory and some nonlinear concerns. It is argued that the critical velocity shear for stabilization of microinstabilities in tokamaks required by linear theory may be, in order of magnitude, a universal frequency. The feasibility of driving perpendicular rotation in tokamaks by neutral beam injection, to suppress microturbulence, is assessed for both toroidal and poloidal injection schemes.

• OSTI ID: 6514078
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:7; ISSN 0899-8221; ISSN PFBPEI
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700310* -- Plasma Confinement-- (1992-)
700340 -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
BEAM INJECTION HEATING
CLOSED PLASMA DEVICES
CONFINEMENT
ELECTRIC FIELDS
HEATING
INSTABILITY
MECHANICAL PROPERTIES
PLASMA
PLASMA CONFINEMENT
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
ROTATING PLASMA
SHEAR PROPERTIES
STABILIZATION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE