【摘 要】
：
To investigate the radiative divertor behavior and physics for the scenario of impurity seeded plasma in ITER,the radiative divertor experiments with argon (Ar)
【机 构】
：
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China“,”Science Island Branc
论文部分内容阅读
To investigate the radiative divertor behavior and physics for the scenario of impurity seeded plasma in ITER,the radiative divertor experiments with argon (Ar) seeding under ITER-like tungsten divertor condition were carried out during recent EAST campaigns.The experimental results reveal the high efficiency of reducing heat load and particle flux onto the divcrtor targets owing to increased radiation by Ar seeding.We achieve detached plasmas in these experiments.The inner-outer divertor asymmetry reduces after Ar seeding.Impurities,such as Ar,C,Li,and W,exist in the entire space of the vacuum chamber during EAST operations,and play important roles in power exhausting and accelerating the plasma detachment process.It is remarkable that the contamination of the core plasma is observed using Ar seeding owing to the sputtering of plasma facing components (PFCs),particularly when Ar impurity is injected from the upper tungsten divertor.
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