Isolation of the Improved Core Confinement from High Recycling and Radiative Boundary in Reversed Magnetic Shear Plasmas of JT-60U

Journal Article · Sat Feb 01 00:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.1267· OSTI ID:467410

Itami, K; Yoshino, R; Asakura, N; Fujita, T; Hosogane, N; Naito, O; Higashijima, S; Konoshima, S; Sakasai, A; Takenaga, H; Shimada, M ^[1]

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1. Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-machi, Naka-gun, Ibaraki-ken, 311-01 (Japan)

Isolation of the core with improved confinement (inside the internal transport barrier) from high recycling and strongly radiative boundary plasmas was demonstrated for the first time in the reversed shear plasmas of the JT-60U tokamak. The internal transport barrier remained intact, while edge radiation and recycling was enhanced with neon and hydrogen gas puffing. The internal transport barrier reduced the particle transport by a factor 10{endash}15, while shrinking in the time scale of resistive diffusion towards the center. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 467410
• Journal Information: Physical Review Letters, Vol. 78, Issue 7; Other Information: PBD: Feb 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
PLASMA CONFINEMENT
JT-60U TOKAMAK
MAGNETIC FIELD REVERSAL
DIFFUSION
TRANSPORT
SHEAR
RADIATIONS