Advanced tokamak research with integrated modeling in JT-60 Upgrade

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3327917· OSTI ID:21371197

Hayashi, N ^[1]

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1. Fusion Research and Development Directorate, Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan)

Researches on advanced tokamak (AT) have progressed with integrated modeling in JT-60 Upgrade [N. Oyama et al., Nucl. Fusion 49, 104007 (2009)]. Based on JT-60U experimental analyses and first principle simulations, new models were developed and integrated into core, rotation, edge/pedestal, and scrape-off-layer (SOL)/divertor codes. The integrated models clarified complex and autonomous features in AT. An integrated core model was implemented to take account of an anomalous radial transport of alpha particles caused by Alfven eigenmodes. It showed the reduction in the fusion gain by the anomalous radial transport and further escape of alpha particles. Integrated rotation model showed mechanisms of rotation driven by the magnetic-field-ripple loss of fast ions and the charge separation due to fast-ion drift. An inward pinch model of high-Z impurity due to the atomic process was developed and indicated that the pinch velocity increases with the toroidal rotation. Integrated edge/pedestal model clarified causes of collisionality dependence of energy loss due to the edge localized mode and the enhancement of energy loss by steepening a core pressure gradient just inside the pedestal top. An ideal magnetohydrodynamics stability code was developed to take account of toroidal rotation and clarified a destabilizing effect of rotation on the pedestal. Integrated SOL/divertor model clarified a mechanism of X-point multifaceted asymmetric radiation from edge. A model of the SOL flow driven by core particle orbits which partially enter the SOL was developed by introducing the ion-orbit-induced flow to fluid equations.

• OSTI ID: 21371197
• Journal Information: Physics of Plasmas, Vol. 17, Issue 5; Other Information: DOI: 10.1063/1.3327917; (c) 2010 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
ALPHA PARTICLES
CHARGED-PARTICLE TRANSPORT
DIVERTORS
ENERGY LOSSES
JT-60 TOKAMAK
JT-60U TOKAMAK
MAGNETIC FIELD RIPPLES
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA SCRAPE-OFF LAYER
PLASMA SIMULATION
ROTATION
BOUNDARY LAYERS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
FLUID MECHANICS
HYDRODYNAMICS
HYDROMAGNETIC WAVES
IONIZING RADIATIONS
LAYERS
LOSSES
MAGNETIC FIELD CONFIGURATIONS
MECHANICS
MOTION
RADIATION TRANSPORT
RADIATIONS
SIMULATION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES