Poloidal edge-plasma rotation driven by angular momentum transfer originating from charge exchange in the scrape-off layer of a tokamak

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871447· OSTI ID:164967

Vaessen, P H.M.; van Toledo, W ^[1]

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1. Centro de Fusao Nuclear, Associacao Euratom-IST, Instituto Superior Tecnico, Avenida Rovisco Pais, 1096 Lisboa Codex (Portugal)

A possible new driving mechanism for poloidal plasma rotation in the scrape-off layer (SOL) of a tokamak is proposed. This driving mechanism results from charge exchange between ``cold`` hydrogen atoms from the wall and ``hot`` plasma ions in the SOL, where the consequent loss of microscopic angular momentum is compensated by an increase of the macroscopic rotation of the edge plasma. Balancing the increase by viscous damping, inherent to the toroidal geometry of the tokamak, gives values for the poloidal rotation velocity, which are in good agreement with experimental results. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 164967
• Journal Information: Physics of Plasmas, Vol. 2, Issue 1; Other Information: PBD: Jan 1995
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TOKAMAK DEVICES
PLASMA SCRAPE-OFF LAYER
ROTATING PLASMA
HYDROGEN
IONS
WALL EFFECTS
PLASMA CONFINEMENT
ANGULAR MOMENTUM
CHARGE EXCHANGE