Development of a compact torus injector system for central fuelling technology of EAST

Zhao, Zhihao; Lan, Tao; Kong, Defeng; Ye, Y.; Zhang, S.B.; Zhuang, G.; Zhang, X.H.; Hu, G.H.; Chen, C.; Wu, Jiadi; Zhang, S.; Qi, Meibin; Li, C.H.; Yang, Xiaokang; Nie, Lin; Wen, Fei; Zi, Pengfei; Li, L.; Meng, Fanwei; Li, B.; Dong, Qilong; Huang, Yuanqing

doi:10.1088/1748-0221/17/05/p05020

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…The experimental results verify its powerful ability for central fueling and also indicate some other beneficial effects, such as high-confinement mode transition and the mitigation of disruptions [6,7]. Recently, a CTI system was designed and built on experimental advanced superconducting tokamak (EAST), which is a medium-sized tokamak with strong magnetic fields (2 ∼ 3 T) [8,9]. The mass and the maximum velocity of the CTI plasma were 90 μg and 150 km•s −1 , respectively, in the first round experiments.…”

Section: Introductionmentioning

confidence: 62%

Vacuum-Ultraviolet spectrometer system for impurity emission measurement on a Compact Torus Injection System of EAST

Shen,

Niu,

Kong

et al. 2024

J. Inst.

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Recently, a compact torus injection (CTI) system was developed for central fueling on experimental advanced superconducting tokamak (EAST). As impurity generated by the interaction between CTI plasma and the electrode material can dilute the fuel particle, it is important to measure impurity content in CTI and evaluate the effect of impurity on the plasma before the application of CTI to EAST. A vacuum-ultraviolet (VUV) spectrometer that utilizes a concave holographic grating with 1200 groove mm-1 was developed and installed on EAST-CTI for impurity emission measurement and transport study. The mainly parts of the spectrometer are an entrance slit, a concave holographic grating with 1200 groove mm-1 and a charge coupled device (CCD). The spectrometer is designed to image the spectra of 50–460 nm by turning the grating. Preliminary experimental results were obtained from the recent EAST-CTI campaign. Impurity line spectra from 50 to 460 nm wavelength range were measured and identified for several impurity species, such as iron, copper, chromium, oxygen, carbon and fluorine. For example, spectra in the intervals of 150 nm to 300 nm contained strong Fe lines. Helium spectra are also measured in the form of He I and He II spectral lines as helium is the main component of the plasma. The results show that the VUV spectrometer is capable of measuring impurity radiations on EAST-CTI and will be a useful tool for impurity behavior study.

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