Reaching High Poloidal Beta at Greenwald Density with Internal Transport Barrier Close to Full Noninductive Current Drive

Journal Article · Mon Aug 20 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.085002· OSTI ID:40231000

Hobirk, J; Wolf, R C; Gruber, O; Gude, A; Guenter, S; Kurzan, B; Maraschek, M; McCarthy, P J; Meister, H; Peeters, A G ^[1]

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1. and others

In the ASDEX Upgrade tokamak, high poloidal beta up to {beta}{sub pol}=3 at the Greenwald density with H-mode confinement has been reached. Because of the high beta, the plasma current is driven almost fully noninductively, consisting of 51% bootstrap and 43% neutral beam driven current. To reach these conditions the discharge is operated at low plasma current (I{sub P}=400 kA ) and high neutral beam heating power (P{sub NBI}=10 MW ). The discharge combines an edge (H mode) and internal transport barrier at high densities without confinement-limiting MHD activities. The extrapolation to higher plasma currents may offer a promising way for an advanced scenario based fusion reactor.

• Sponsoring Organization: (US)
• OSTI ID: 40231000
• Journal Information: Physical Review Letters, Vol. 87, Issue 8; Other Information: DOI: 10.1103/PhysRevLett.87.085002; Othernumber: PRLTAO000087000008085002000001; 050134PRL; PBD: 20 Aug 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONFINEMENT
EXTRAPOLATION
HEATING
PLASMA
THERMONUCLEAR REACTORS
TRANSPORT