Results 1 to 10 of about 63,312 (284)

The scalings of the thermal energy confinement time in EAST H-mode plasmas

Nuclear Fusion, 2023
This paper describes scalings of the H-mode confinement database of neutral beam injection (NBI)-lower hybrid wave (LHW) and electron cyclotron resonant heating-LHW plasmas in the EAST tokamak.
T.Q. Jia, J.P. Qian, D.L. Chen, D. Moreau, B. Shen, B. Zhang, X.Z. Gong, J. Huang, J.Y. Zhang, X.D. Yang, R.R. Liang, Y.C. Hu, L.X. Chen, Y.F. He, Y. Tao, Z.H. Wang, L. Zeng, Y.W. Sun   +17 more
doaj   +2 more sources

Automatic identification of tokamak plasma confinement states (L-mode, ELM-free H-mode, and ELMy H-mode) with multi-task learning neural network

Nuclear Fusion
The identification of plasma confinement states (L-mode, ELM-free H-mode, and ELMy H-mode) is carried out using a multi-task learning neural network (MTL-NN) in EAST.
Guo-Hong Deng, Peng-Cheng Xie, You-Wen Sun, Hui-Hui Wang, Jian Xu, Qun Ma, Shuai Gu, Hui Sheng, Hua Yang, Gao-Ting Chen   +9 more
doaj   +2 more sources

Spontaneous evolution of density peaking factor in TEM turbulence-dominated H-mode plasma on the EAST Tokamak [PDF]

Scientific Reports
Understanding the self-organized behaviour of particle confinement is critical for density control in magnetically confined thermonuclear fusion devices.
J. S. Geng, P. Li, Y. D. Li, F. Chen, Y. Q. Chu, N. Sun, Y. X. Li, Y. F. He, C. B. Wu, X. H. Wu, Y. X. Sun, Y. C. Hu, D. G. Wu, P. J. Sun, Y. F. Jin, H. L. Zhao, T. Zhang, T. F. Zhou, G. L. Lin, Q. Zang, H. Q. Liu   +20 more
doaj   +2 more sources

Overview of initial negative triangularity plasma studies on the ASDEX Upgrade tokamak

Nuclear Fusion, 2022
An overview of results of negative triangularity (NT) studies from the ASDEX Upgrade tokamak (AUG) is given. Moderate values of the triangularity in the range of δ _average ≈ −0.2 have been obtained.
T. Happel, T. Pütterich, D. Told, M. Dunne, R. Fischer, J. Hobirk, R.M. McDermott, U. Plank, ASDEX Upgrade Team the   +8 more
doaj   +1 more source

Interplay between beam-driven chirping modes and plasma confinement transitions in spherical tokamak ST40

Nuclear Fusion, 2022
Experiments on the high field spherical tokamak ST40 have led to the recent observation of interplay between beam-driven modes of sweeping frequency (chirping modes) and transitions to the enhanced global confinement regime (H-mode) and back to the low ...
J. Bland, J. Varje, N.N. Gorelenkov, M.P. Gryaznevich, S.E. Sharapov, J. Wood, Team The ST40   +6 more
doaj   +1 more source

Confinement transitions (H-mode) in JET inner wall limiter plasmas [PDF]

Plasma Physics and Controlled Fusion, 2006
Transitions in confinement with characteristics of H-mode are observed in JET inner wall limited plasmas in experiments performed at a magnetic field of 0.8 T and at a current of 0.9 MA, using up to 7 MW of auxiliary heating power. These transitions in confinement are short lived, with durations of up to 20 ms, but the overall stored energy increases ...
D Borba, B Alper, G D Conway, I Nunes, S Hacquin, D C McDonald, G Maddison, P Lomas, S D Pinches, the JET EFDA contributors   +9 more
openaire   +1 more source

Investigation of Tearing Modes on the Spherical Tokamak Globus-M2 Using the Doppler Backscattering Method

Applied Sciences, 2023
In this study, we observed magnetohydrodynamic (MHD) activity of the spherical tokamak Globus-M2 which led to a deterioration in plasma confinement, such as a transition from the H-mode to L-mode, or even disruption.
Alexander Yashin, Anna Ponomarenko, Ivan Balachenkov, Gleb Kurskiev, Evgenii Kiselev, Vladimir Minaev, Alexander Petrov, Yury Petrov, Nikolay Sakharov, Nikita Zhiltsov   +9 more
doaj   +1 more source

Lithium splashing from flowing liquid lithium limiter and its effect on high confinement plasma performance in EAST tokamak

Nuclear Materials and Energy, 2020
To study the potential applications of liquid lithium (Li) as plasma facing material, the third generation of flowing liquid Li (FLiLi) limiter has been designed and successfully tested in EAST tokamak H-mode discharges in the 2018 run campaign.
Z.L. Tang, G.Z. Zuo, C.L. Li, R. Maingi, X.C. Meng, W. Xu, Z. Sun, Y.Z. Qian, M. Huang, D.H. Zhang, D. Andruczyk, K. Tritz, X.L. Yuan, X.B. Zhang, J.S. Hu   +14 more
doaj   +1 more source

Neural network identification of the weakly coherent mode in I-mode discharge on EAST

Nuclear Fusion, 2023
The improved energy confinement mode (I-mode) is widely considered as an important operation regime for ITER. I-mode implementation depends on the specified basic plasma parameters and certain operation conditions, which are discovered by statistical ...
K.N. Yang, Z.X. Liu, J. Liu, F.F. Long, T.Y. Xia, X. Gao, Y.J. Liu, J.Y. Li, P.C. Li, C.C. Deng, X.Y. Yin, H. Li, J.L. Xie, T. Lan, W.Z. Mao, A.D. Liu, C. Zhou, W.X. Ding, G. Zhuang, W.D. Liu, the EAST Team   +20 more
doaj   +1 more source

Self-sustained turbulence and H-mode confinement in toroidal plasmas

Plasma Physics and Controlled Fusion, 1996
A theory of the anomalous transport coefficient in toroidal helical systems (such as stellarators, torsatron and Heliotron devices) is developed. The theoretical formalism of self-sustained turbulence is applied to the interchange mode turbulence and ballooning mode turbulence.
Sanae-I Itoh, Kimitaka Itoh, Masatoshi Yagi, Atsushi Fukuyama   +3 more
openaire   +1 more source