Observation of the toroidal rotation in a new designed compact torus system for EAST
Z. H. Zhao, T. Lan, D. F. Kong, Y. Ye, S. B. Zhang, G. Zhuang, X. H., Zhang, G. H. Hu, C. Chen, J. Wu, S. Zhang, M. B. Qi, C. H. Li, X. M. Yang, L., Y. Nie, F. Wen, P. F. Zi, L. Li, F. W. Meng, B. Li, Q. L. Dong, Y. Q. Huang

TL;DR
This paper reports the observation of plasma rotation and preliminary results from a new compact torus injection system designed for the EAST tokamak, demonstrating promising parameters for future tokamak fueling.
Contribution
It introduces a new compact torus injection system for EAST and provides initial experimental observations of plasma rotation and density evolution.
Findings
Plasma velocity reached 56 km/s
Electron density achieved 8.73×10^20 m^(-3)
Significant plasma rotation observed during formation
Abstract
Compact torus injection is considered as a high promising approach to realize central fueling in the future tokamak device. Recently, a compact torus injection system has been developed for the Experimental Advanced Superconducting Tokamak, and the preliminary results have been carried out. In the typical discharges of the early stage, the velocity, electron density and particles number of the CT can reach 56.0 km/s, 8.73*10^20 m^(-3) and 2.4*10^18 (for helium), respectively. A continuous increase in CT density during acceleration was observed in the experiment, which may be due to the plasma ionized in the formation region may carry part of the neutral gas into the acceleration region, and these neutral gases will be ionized again. In addition, a significant plasma rotation is observed during the formation process which is introduced by the E*B drift. In this paper, we present the…
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Taxonomy
TopicsSuperconducting Materials and Applications · Magnetic confinement fusion research · Particle accelerators and beam dynamics
