Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles

doi:10.1088/1361-6587/aca4f6

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	Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles
	C. X. Zhao; Y. Y. Chen; J. Song; X. X. Mei; Q. K. Pan; R. R. Zhang; L. Yang; F. T. Zhao; J. W. Li and D. Z. Wang
	2023
Source Publication	Plasma Physics and Controlled Fusion
ISSN	0741-3335
Volume	65 Issue:1 Pages:14
Abstract	Plasma wall interaction inevitably occurs during the operation of tokamaks. The coaxial gun device has low operation cost and the parameters of plasma produced by the gun are close to those of type I edge localized mode (ELM); therefore, the coaxial gun is suitable in simulation experiments as a heat flux source of transient events such as type I ELM under the condition of H-mode in the International Thermonuclear Experimental Reactor. In this paper, the plasma generated by the discharge of a tapered coaxial accelerator thermal shock on a tungsten target is used to simulate the damage effect of the divertor. The plasma parameters are measured in the experiment. The velocity of the plasma is 41.7 km s(-1), and the kinetic energy of a single hydrogen ion is 9.2 eV. The energy density at the center of the plasma can reach 1.5 MJ m(-2), and the density can reach about 2.78 x 10(15) cm(-3). The reflection of plasma in the process of exposure at different angles is observed. It is observed that droplets of millimeter size splash from the target. Traces of liquid flow are observed on the surface of the target, which shows that there is a melting process on the surface of the target. The mass loss of the target is of the order of milligrams after 20 pulses. The ablation and residual stress of the target surface both decrease with a decrease in the angle. This is because the accumulated energy per unit area of the target surface decreases with a decrease in the angle. The results of the simulation experiment help us to understand the working state around the divertor target in tokamak devices.
DOI	10.1088/1361-6587/aca4f6
URL	查看原文
Indexed By	sci
Language	英语
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Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/66650
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	C. X. Zhao,Y. Y. Chen,J. Song,et al. Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles[J]. Plasma Physics and Controlled Fusion,2023,65(1):14.
APA	C. X. Zhao.,Y. Y. Chen.,J. Song.,X. X. Mei.,Q. K. Pan.,...&J. W. Li and D. Z. Wang.(2023).Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles.Plasma Physics and Controlled Fusion,65(1),14.
MLA	C. X. Zhao,et al."Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles".Plasma Physics and Controlled Fusion 65.1(2023):14.

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