Author:
HE Yu,CHENG Jun,XU Yuhong,FANG Qian,LI Yucai,XU Jianqiang,WANG Weice,YAN Longwen,HUANG Zhihui,WU Na,JIANG Min,SHI Zhongbing,LIU Yi,ZHONG Wulyu,XU Min
Abstract
Abstract
The impact of the mass isotope on plasma confinement and transport properties has been investigated in Ohmically-heated hydrogen and deuterium plasmas in the HL-2A tokamak. Experimental results show that under similar discharge parameters the deuterium plasma has better confinement and lower turbulent transport than the hydrogen one, and concomitantly, it is found that the magnitude of geodesic acoustic mode zonal flows, the tilting angle of the Reynolds stress tensor and the turbulence correlation lengths are all larger in the edge region of the deuterium plasma. The results provide direct experimental evidence on the importance of the nonlinear energy coupling between ambient turbulence and zonal flows for governing the isotope effects in fusion plasmas.
Funder
Sichuan International Science and Technology Innovation Cooperation Project
National Natural Science Foundation of China
National Key R&D Program of China
National Magnetic Confinement Fusion Science Program of China
Science and Technology Plan Project in Sichuan Province of China
Cited by
1 articles.
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