论文信息 - Overview of recent HL-2A experiments - 字舞流文

Overview of recent HL-2A experiments

For the first time supersonic molecular beam injection (SMBI) and cluster jet injection (CJI) were applied to mitigate edge-localized modes (ELMs) in HL-2A successfully. The ELM frequency increased by a factor of 2–3 and the heat flux on the divertor target plates decreased by 50% on average after SMBI or CJI. Energetic particle induced modes were observed in different frequency ranges with high-power electron cyclotron resonance heating (ECRH). The high frequency (200–350 kHz) of the modes with a relatively small amplitude was close to the gap frequency of the toroidicity-induced Alfven eigenmode. The coexistent multi-mode magnetic structures in the high-temperature and low-collision plasma could affect the plasma transport dramatically. Long-lived saturated ideal magnetohydrodynamic instabilities during strong neutral beam injection heating could be suppressed by high-power ECRH. The absolute rate of nonlinear energy transfer between turbulence and zonal flows was measured and the secondary mode competition between low-frequency (LF) zonal flows (ZFs) and geodesic acoustic modes (GAMs) was identified, which demonstrated that ZFs played an important role in the L–H transition. The spontaneously generated E × B shear flow was identified to be responsible for the generation of a large-scale coherent structure (LSCS), which provided unambiguous experimental evidence for the LSCS generation mechanism. New meso-scale electric potential fluctuations (MSEFs) at frequency f ∼ 10.5 kHz with two components of n = 0 and m/n = 6/2 were also identified in the edge plasmas for the first time. The MSEFs coexisted and interacted with magnetic islands of m/n = 6/2, turbulence and LF ZFs.

Yi Liu | Shigeru Inagaki | Masahiko Isobe | Shigeru Morita | L. Delpech | D. Mazon | G. Y. Zheng | A. Ekedahl | Y. Peysson | X. Y. Bai | H. J. Li | X. L. Zou | Katsumi Ida | J. Q. Dong | Y. P. Zhang | Wang Yong | Patrick Diamond | Xingguo Li | Hl A Team | X. R. Duan | X. T. Ding | X. M. Song | Y. B. Dong | X. Q. Ji | J. Cheng | W. Chen | D. L. Yu | Z. Y. Cui | Y. Xu | G. J. Lei | J. Y. Cao | L. Y. Chen | L. W. Yan | Q. W. Yang | M. Huang | D. Q. Liu | Yanping Huang | B. S. Yuan | K. Itoh | S.-I. Itoh | G. Li | T. Hoang | B. Lu | J. Rao | W. M. Xuan | W. C. Mao | Q. Wang | Z. Cao | B. Li | C. H. Cui | B. B. Feng | Qing Li | J. F. Peng | K. J. Zhao | Y. Zhou | Yong Liu | M. Xu | W. L. Zhong | Q. J. Li | J. Zhang | Z. B. Shi | Xiaogang Wang | G. L. Xiao | L. M. Yu | Y. G. Li

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