TY - CONF
T1 - Integrated operation in achieving steady-state H-mode plasma on EAST
AU - The EAST Team
AU - Gong, X.
AU - Garofalo, A. M.
AU - Huang, J.
AU - Qian, J.
AU - Holcomb, C. T.
AU - Ekedah, A.
AU - Maingi, R.
AU - Li, E.
AU - Zeng, L.
AU - Zhang, B.
AU - Chen, J.
AU - Goniche, M.
AU - Moreau, D.
AU - Peysson, Y.
AU - Urbanczyk, G.
AU - Wu, M.
AU - Du, H.
AU - Li, M.
AU - Zhu, X.
AU - Sun, Y.
AU - Xu, G.
AU - Zang, Q.
AU - Wang, L.
AU - Zhang, L.
AU - Liu, H.
AU - Lyu, B.
AU - Sun, P.
AU - Ding, S.
AU - Zhang, X.
AU - Liu, F.
AU - Zhao, Y.
AU - Xiao, B.
AU - Hu, J.
AU - Hu, C.
AU - Hu, L.
AU - Li, J.
AU - Wan, B.
N1 - Publisher Copyright:
© EPS 2019. All rights reserved.
PY - 2019
Y1 - 2019
N2 - A 100 sec long-pulse steady-state H-mode plasma with good energy confinement (H98(y,2) ~ 1.1) has been successfully achieved on EAST using RF heating and current drive. Recent EAST experiments with improved hardware capabilities have demonstrated steady-state fully non-inductive scenarios with extension of fusion performance (ßP~2.5 & ßN~2.0, H98(y,2)~1.2, /nGW~0.8, fBS~50% at q95~6.8) through integrated control of the wall conditioning and recycling, plasma configuration, divertor heat flux, particle and impurity control, and the effective coupling of multiple RF heating and current drive (H&CD) sources. This steady-state scenario was characterized with fully non-inductive current drive at high density with low rotation and high-frequency, small-amplitude edge localized modes (ELMs), and stable control of heat and particle exhaust using various technologies (e.g. RMP) on the ITER-like tungsten divertor. The optimization of the X-point, plasma shape, the outer gap and local gas puffing near the lower hybrid wave (LHW) antenna were integrated with global parameters of BT, line averaged electron density for high LHW current drive efficiency, and on-axis deposition of ECH in the long pulse operation. The benefits of using ECRH to avoid tungsten accumulation in the core plasma, and enhancement of H&CD by the synergistic effect of ECH and LHW were demonstrated. A higher energy confinement is observed at higher performance with favorable BT direction.
AB - A 100 sec long-pulse steady-state H-mode plasma with good energy confinement (H98(y,2) ~ 1.1) has been successfully achieved on EAST using RF heating and current drive. Recent EAST experiments with improved hardware capabilities have demonstrated steady-state fully non-inductive scenarios with extension of fusion performance (ßP~2.5 & ßN~2.0, H98(y,2)~1.2, /nGW~0.8, fBS~50% at q95~6.8) through integrated control of the wall conditioning and recycling, plasma configuration, divertor heat flux, particle and impurity control, and the effective coupling of multiple RF heating and current drive (H&CD) sources. This steady-state scenario was characterized with fully non-inductive current drive at high density with low rotation and high-frequency, small-amplitude edge localized modes (ELMs), and stable control of heat and particle exhaust using various technologies (e.g. RMP) on the ITER-like tungsten divertor. The optimization of the X-point, plasma shape, the outer gap and local gas puffing near the lower hybrid wave (LHW) antenna were integrated with global parameters of BT, line averaged electron density for high LHW current drive efficiency, and on-axis deposition of ECH in the long pulse operation. The benefits of using ECRH to avoid tungsten accumulation in the core plasma, and enhancement of H&CD by the synergistic effect of ECH and LHW were demonstrated. A higher energy confinement is observed at higher performance with favorable BT direction.
UR - https://www.scopus.com/pages/publications/85084017901
UR - https://www.scopus.com/inward/citedby.url?scp=85084017901&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85084017901
T2 - 46th European Physical Society Conference on Plasma Physics, EPS 2019
Y2 - 8 July 2019 through 12 July 2019
ER -