Various divertor biasing configurations and improved divertor performance with biasing on Tokamak de Varennes (TdeV)*

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870699· OSTI ID:6690262

Decoste, R; Lachambre, J; Abel, G; Boileau, A; Boucher, C; Cote, A; Fall, T; Gauvreau, J; Gregory, B C; Haddad, E; Janicki, C; Liu-Hinz, C; Mai, H H; Martin, F; Michaud, D; Richard, N; Ross, G; Sarkissian, A; Stansfield, B L; Terreault, B ; Zuzak, W ^[1]

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1. Centre Canadien de Fusion Magnetique, Varennes, Quebec J3X 1S1 (Canada)

Electrically insulated divertor plates are used on TdeV (Tokamak de Varennes) [18[ital th] [ital EPS] [ital Conference] [ital on] [ital Controlled] [ital Fusion] [ital and] [ital Plasma] [ital Physics] Berlin (European Physical Society, Petit-Lancy, 1991), Vol. 15C, Part I, pp. 1--141] to produce various biasing configurations, which can be decomposed into two basic modes. Plasma biasing, with a radial electric field [ital E][sub [ital r]] in the scrape-off layer (SOL), is most promising for divertor applications. The [ital E][sub [ital r]] field is produced with a particular divertor plate geometry, causing a nonambipolar radial current and a particle flow in the [ital E][sub [ital r]][times][ital B][sub [ital T]] direction, toward one of the divertors (the active divertor). The pressure and impurity retention in the active divertor are shown, in the Ohmic regime, to be strongly increased by biasing. He exhaust through this divertor is increased by a factor of almost 3 with modest biasing voltages and currents scalable to larger devices. Biasing also modifies the power repartition between the divertors, with the active divertor also receiving a larger fraction of the power.

• OSTI ID: 6690262
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:5; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700412* -- Magnetic Confinement Devices-- (1992-)
CLOSED PLASMA DEVICES
DESIGN
DIVERTORS
ELECTRIC FIELDS
IMPURITIES
PERFORMANCE
PLASMA IMPURITIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES