High performance and current drive experiments in the JAERI Tokamak-60 Upgrade

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870943· OSTI ID:6690593

Kondoh, T ^[1]

---

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

Recent high-fusion-triple-product and current drive experiments in the JAERI Tokamak-60 Upgrade (JT-60U) [Plasma Devices Oper. [bold 1], 43 (1990)] are reported. The fusion triple product of 1.1[times]10[sup 21] m[sup [minus]3] s keV has been achieved in a more improved confinement mode (high-[beta][sub [ital p]] H-mode) in which the confinement is improved in the edge region as well as the core region. The most remarkable feature in the improved confinement mode is the multistage formation of transport barriers. The transport barrier was formed in the plasma interior first. After that, the transport barrier was formed in the edge region. For steady-state operation and current profile control, lower hybrid current drive (LHCD) and neutral beam current drive (NBCD) experiments with bootstrap current contribution are also in progress. Full current drive of 3.6 MA has been achieved at a density of 1.1[times]10[sup 19] m[sup [minus]3] with a current drive efficiency of [ital n][sub [ital e]][center dot][ital R][sub [ital p]][center dot][ital I][sub CD]/[ital P][sub LH]=2.5[times]10[sup 19] m[sup [minus]2] A W[sup [minus]1] with a 5.7 MW LH wave injection. Current profile control with various LH wave spectra and with NBCD were also demonstrated.

• OSTI ID: 6690593
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:5; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700410* -- Specific Fusion Devices & Experiments-- (1992-)
BEAM INJECTION
BOOTSTRAP CURRENT
CLOSED PLASMA DEVICES
CONFINEMENT
CURRENT-DRIVE HEATING
CURRENTS
ELECTRIC CURRENTS
ELECTRIC HEATING
HEATING
JOULE HEATING
LOWER HYBRID CURRENT DRIVE
NEUTRAL ATOM BEAM INJECTION
NON-INDUCTIVE CURRENT DRIVE
PERFORMANCE
PLASMA CONFINEMENT
PLASMA HEATING
RESISTANCE HEATING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES