Research progress on JT-60U in advanced steady-state operation

Naito, Osamu

Recent research progress on JT-60U in advanced steady-state operation is presented. High fusion performance of $Q_{DT} > 0.6$ has been obtained in negative magnetic shear plasmas as well as in high- $beta_{p}$ H-mode. A negative shear discharge is shown to have enhanced core confinement. Its sustainment and compatibility with radiative divertor are also explored. Stability and confinement are improved in high triangularity operation and a noninductive discharge with high integrated performance has been achieved. The installation of negative-ion-based neutral beam injection system on JT-60U has been completed and beam injection into plasmas has been started. A preparation for the modification of the present JT-60U's open divertor to a W-shaped semi-closed divertor, and a conceptual design and R&D for JT-60 Super Upgrade are in pregress.

Language	:	English
Journal	:	Fusion Technology 1996, Vol.1
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Pages	:	p.215 - 220
Publication Year/Month	:	1997/09
Meeting title	:	19th Symposium on Fusion Technology (SOFT-19)
Held date	:	1996/09
Location (city)	:	Lisbon
Location (country)	:	Portugal
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Keywords	:	トカマク; 定常化; 負NBI; 負磁気シア; 高三角度
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Registration No. : B19960949
JAEA Abstracts No. :
Paper Submission No. : 27181

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