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Effects of sawtooth heat pulses on edge flows and turbulence in a tokamak plasma
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作者 赵开君 Yoshihiko NAGASHIMA +22 位作者 郭志彬 Patrick H DIAMOND 董家齐 严龙文 Kimitaka ITOH Sanae-I ITOH 李晓博 李继全 Akihide FUJISAWA Shigeru INAGAKI 程钧 许健强 yusuke kosuga Makoto SASAKI 王正汹 张怀强 陈俞钱 曹小岗 余德良 刘仪 宋显明 夏凡 王硕 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第1期1-9,共9页
Enhancements of edge zonal flows,radial electric fields,and turbulence are observed in electron cyclotron resonance heating-heated plasmas(Zhao et al 2013 Nucl.Fusion 53083011).In this paper,the effects of sawtooth he... Enhancements of edge zonal flows,radial electric fields,and turbulence are observed in electron cyclotron resonance heating-heated plasmas(Zhao et al 2013 Nucl.Fusion 53083011).In this paper,the effects of sawtooth heat pulses on flows and turbulence are presented.These experiments are performed using multiple Langmuir probe arrays in the edge plasmas of the HL-2A tokamak.The edge zonal flows,radial electric fields,and turbulence are all enhanced by sawteeth.Propagation of the zonal flow and turbulence intensities is also observed.The delay time of the maximal intensity of the electric fields,zonal flows,and turbulence with respect to the sawtooth crashes is estimated as~1 ms and comparable to that of the sawtooth-triggered intermediate phases.Not only the zonal flows but also the radial electric fields lag behind the turbulence.Furthermore,the intensities of both the zonal flows and electric fields nearly linearly increase/decrease with the increase/decrease of the turbulence intensity.A double-source predator-prey model analysis suggests that a relatively strong turbulence source may contribute to the dominant zonal flow formation during sawtooth cycles. 展开更多
关键词 TOKAMAK Langmuir probe arrays edge flows and turbulence sawtooth heat pulses
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