Double-Null Divertor Design for JT-60SU, A 10-MA Class Long-Pulse Tokamak

Journal Article · Mon Jan 15 00:00:00 EST 2001 · Fusion Science and Technology

OSTI ID:20845776

West, W P ^[1]; Friend, M E ^[1]; Baxi, C B ^[1]; Humphreys, D A ^[1]; Leuer, J A ^[1]; Petrie, T W ^[1]; Reis, E E ^[1]; Ishida, S ^[2]; Kurita, G ^[2]; Neyatani, Y ^[2]; Sakasai, A ^[2]

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1. General Atomics (United States)
2. Japan Atomic Energy Research Institute (Japan)

The design of a double-null divertor for use in JT-60SU is presented. The free-boundary equilibrium code EFIT is used to establish a symmetric highly triangular double-null plasma shape. The baffle shapes are highly contoured to match the equilibrium, with the plasma-facing surfaces intersecting the flux surfaces at steep angles in the regions of high heat flux. These contoured surfaces also provide a tightly baffled design with small-aperture pumping gaps near both the inner and outer divertor strike points. The gaps provide adequate throughput of D{sub 2} gas for active control of impurity entrainment at reasonable pressures. The structural design is shown to be consistent with both forces from disruptions and thermal stress during vacuum vessel bakeout.

• OSTI ID: 20845776
• Journal Information: Fusion Science and Technology, Vol. 39, Issue 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); ISSN 1536-1055
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APERTURES
CONTAINERS
CONTROL
DESIGN
DIVERTORS
EQUILIBRIUM
FIRST WALL
HEAT FLUX
JT-60U TOKAMAK
MAGNETIC SURFACES
PLASMA
PLASMA IMPURITIES
PULSES
PUMPING
SURFACES
THERMAL STRESSES