Experimental Study of Turbulence and Zonal Flow in Edge Plasmas of the HL-2A Tokamak
作者： Jiaqi DONG , Kaijun ZHAO , Longwen YAN , Wenyu HONG , Changxuan YU
DOI: 10.1585/PFR.5.S2014
关键词:
摘要: Measurements with a three dimensional set of Langmuir probe arrays have unambiguously demonstrated the coexistence intensive low frequency zonal flows (LFZFs), geodesic acoustic modes (GAMs), fluctuations (LFFs) and high ambient turbulence (HFAT) in edge HL-2A tokamak plasmas, by verifying temporal spatial characteristics electrostatic fluctuations. The intensity LFZFs is observed to increase decrease increases ECRH power (∼ 300-700 kW) safety factor q 3.5-6.2), respectively, GAMs as well q. radial wave number-frequency spectra LFZF show that packets propagate outwards inwards equally likely events, while GAM predominantly outwards. coupling flows, including GAMs, LFFs HFAT investigated detail.
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