Quasisteady High-Confinement Reversed Shear Plasma with Large Bootstrap Current Fraction under Full Noninductive Current Drive Condition in JT-60U

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

DOI:https://doi.org/10.1103/PhysRevLett.87.085001· OSTI ID:40230982

Fujita, T; Ide, S; Kamada, Y; Suzuki, T; Oikawa, T; Takeji, S; Sakamoto, Y; Koide, Y; Isayama, A; Hatae, T ^[1]

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1. and others

A quasisteady reversed shear plasma with a large bootstrap current fraction ({approx}80% ) has been obtained for the first time in the JT-60U tokamak. The shrinkage of reversed shear region was suppressed by the bootstrap current peaked at the internal transport barrier (ITB) layer and the ITBs at a large radius were sustained, which, by combination with an H -mode edge pedestal, resulted in a high confinement or 2.2times the H -mode scaling for 6times energy confinement time or 2.7s. Furthermore, a full noninductive current drive was obtained by the bootstrap current and the beam driven current.

• Sponsoring Organization: (US)
• OSTI ID: 40230982
• Journal Information: Physical Review Letters, Vol. 87, Issue 8; Other Information: DOI: 10.1103/PhysRevLett.87.085001; Othernumber: PRLTAO000087000008085001000001; 011134PRL; 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
BOOTSTRAP CURRENT
CONFINEMENT
CONFINEMENT TIME
JT-60U TOKAMAK
PLASMA
REVERSED SHEAR
SHRINKAGE
TRANSPORT