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摘要:
In the recent experiment on the HL-2A tokamak,two types of improved confinement regimes have been achieved in different configurations.One is the improved confinement regime in Umiter configuration during electron cyclotron resonant heating(ECRH),characterized by a sharp decrease in Hσ emission accompanied by an increase in the total radiation of plasma,the line averaged electron density and the stored energy of plasma.The other is high confinement regime(H-mode)in divertor configuration during a combination of ECRH and Neutral beam injection(NBI)heating,characterized with edge localized modes(ELMs)besides the features mentioned above.The ELMs are found to be localized on the plasma edge(r/α≥0.8),causing average losses of particles and stored energy in the ranges of about1-3% and 3-5% respectively during a single ELM event.So far,the ELMs observed in the HL-2A are type Ⅲ ELMs with low amplitude and high repetition frequency in a range from 200 Hz to 350 Hz.An investigation of the radiated power density profiles shows that radiative cooling effect plays a significant role in the transition back to the L-mode and the triggering of ELM events.
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篇名 Properties of plasma radiation during discharges with improved confinement on HL-2A Tokamak
来源期刊 中国物理B(英文版) 学科
关键词 improved confinement edge localized modes radiative cooling effect
年,卷(期) 2010,(11) 所属期刊栏目
研究方向 页码范围 465-474
页数 10页 分类号
字数 语种 英文
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improved confinement
edge localized modes
radiative cooling effect
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中国物理B(英文版)
月刊
1674-1056
11-5639/O4
北京市中关村中国科学院物理研究所内
eng
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17050
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27962
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