Inaugural central fueling experiment with Compact Torus in EAST

Abstract We report, for the first time, non-disruptive central fueling experiments utilizing Compact Torus (CT) plasma injection in the medium-sized fully-superconducting tokamak, EAST ( R 0 = 1.9 m, a = 0.45 m, B t = 1.5–2.5 T). In these experiments, the CT plasma achieved velocities near 150 km s −1 , with electron densities of 1.6 × 10 22 m −3 and particle numbers reaching 1.3 × 10 20 . After traversing approximately 1300 mm through the drift tube, the CT plasma was successfully injected into the normalized poloidal flux surface at Ψ N = 0.8–0.85, corresponding to a magnetic field strength of 2.05–2.02 T. This direct injection depth exceeds predictions from empirical formulas and represents the highest magnetic field strength at which CT injection has been demonstrated to date. Following the direct injection, CT particles underwent further indirect inward diffusion toward the core region. Density measurements revealed that CT deposition disrupted the density profile in the core of the tokamak, resulting in a hollow distribution that ultimately evolved into a more peaked density profile. These findings have important implications for improving plasma confinement in tokamaks.

Authors

Institutions

Publication Details

Journal
Nuclear Fusion
Published
2025-07-24
DOI
https://doi.org/10.1088/1741-4326/adf3c8
Primary Topic
Nuclear reactor physics and engineering
Type
article
Field-Weighted Citation Impact
0.00

Funders

Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Inaugural central fueling experiment with Compact Torus in EAST

Defeng Kong, Y.Q. Huang, Shoubiao Zhang, Shouxin Wang et al.
Nuclear Fusion
Nuclear reactor physics and engineering
article

Inaugural central fueling experiment with Compact Torus in EAST

Defeng Kong, Y.Q. Huang, Shoubiao Zhang, Shouxin Wang, Zhaoxuan Li, Bin Cao, Chengming Qu, Yahao Wu, Mingsheng Tan, Hailin Zhao, Jiangang Li, Tao Zhang, Yang Ye, Ling Zhang, Junwei Yan, Xiaohui Zhang, Lixiang Yang, Zhihao Zhao, Fubin Zhong, X.P. Wang
article en

Abstract

Abstract We report, for the first time, non-disruptive central fueling experiments utilizing Compact Torus (CT) plasma injection in the medium-sized fully-superconducting tokamak, EAST ( R 0 = 1.9 m, a = 0.45 m, B t = 1.5–2.5 T). In these experiments, the CT plasma achieved velocities near 150 km s −1 , with electron densities of 1.6 × 10 22 m −3 and particle numbers reaching 1.3 × 10 20 . After traversing approximately 1300 mm through the drift tube, the CT plasma was successfully injected into the normalized poloidal flux surface at Ψ N = 0.8–0.85, corresponding to a magnetic field strength of 2.05–2.02 T. This direct injection depth exceeds predictions from empirical formulas and represents the highest magnetic field strength at which CT injection has been demonstrated to date. Following the direct injection, CT particles underwent further indirect inward diffusion toward the core region. Density measurements revealed that CT deposition disrupted the density profile in the core of the tokamak, resulting in a hollow distribution that ultimately evolved into a more peaked density profile. These findings have important implications for improving plasma confinement in tokamaks.

Nuclear FusionVol. 65(8)
Hengyang Normal University (CN), Hefei University of Technology (CN), Anhui University of Science and Technology (CN), Chinese Academy of Sciences (CN), Institute of Plasma Physics (CN)
National Natural Science Foundation of China
Openalex Percentile: Top 76%
Nuclear reactor physics and engineering
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.