Speaker
Dr
Yeong-Kook Oh
(National Fusion Research Institute)
Description
The KSTAR device has been operated since the first plasma in 2008 with the mission of exploring the physics and technologies of high performance steady-state operation that are essential for ITER and fusion reactor. KSTAR has been focusing on maximizing performance and extending pulse length targeting H-mode dischage up to 300s at higher plasma current up to 2 MA, and at higher normalized beta (βN) up to ~5.
In the 2015 campaign, various long pulse H-mode discharges
have been operated after the improved plasma shape control, and a longest H-mode discharge was achieved up to 55 s at 0.6 MA in plasma current and 2.9 T in toroidal field utilizing 4.2 MW neutral beam and 0.65MW ECCD systems. This will be the longest H-mode discharge in tokamak devices. Fully non-inductive discharges have been carried out at the reduced plasma current of 0.4 MA to access the steady-state operation condition. The first fully non-inductive operation was achieved with relatively high plasma performances (βN ~ 2.1 and βP ~ 3.0). However the shot was terminated at about 16s due to the excessive heat in poloidal limiter.
KSTAR device could be an ideal device to investigate the basic of the stability limits and confinement improvement utilizing unique features of KSTAR such as extremely low error field, versatile in-vessel control coils (IVCC), and advanced 2D/3D imaging diagnostics. In this paper, the progress of the KSTAR research to support ITER and DEMO will be reported.
| Country or International Organization | Republic of Korea |
|---|---|
| Paper Number | OV/2-4 |
Primary author
Dr
Yeong-Kook Oh
(National Fusion Research Institute)
Co-authors
Dr
David Humphreys
(General Atomics)
Prof.
Gunsu YUN
(Pohang University of Science and Technology)
Prof.
Hyeon K. Park
(UNIST)
Dr
Jae-Min Kwon
(National Fusion Research Institute)
Dr
Jong-Gu Kwak
(National Fusion Research Institute)
Dr
Jong-Kyu Park
(Princeton Plasma Physics Laboratory)
Dr
Joon-Wook Ahn
(Oak Ridge National Laboratory)
Mr
Kap-rai Park
(National Fusion Research Institute)
Dr
Si-Woo Yoon
(National Fusion Research Institute)
Dr
Sonjong Wang
(National Fusion Research Institute)
Dr
Steven Sabbagh
(Columbia University)
Dr
Suk-Ho Hong
(National Fusion Research Institute)
Prof.
Wonho Choe
(Korea Advanced Institute of Science and Technology)
Dr
Yong Chu
(National Fusion Research Institute)
Prof.
Yong-Su Na
(Seoul National University)
Dr
Yong-Un Nam
(National Fusion Research Institute)
Dr
Yongkyoon In
(National Fusion Research Institute)
Dr
YoungMu Jeon
(National Fusion Research Institute)
