英国物理学会
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作者:R. Ke , M. Xu ...
来源:[J].Journal of Instrumentation(IF 1.869), 2018, Vol.13 (05)IOP
摘要:Multi-step Langmuir probe arrays have been designed and installed on the HL-2A tokamak [1]–[2] to study the turbulent transport in the edge plasma, especially for the measurement of poloidal momentum flux, Reynolds stress Rs . However, except the probe tips on the top step, ...
作者:R. Ke , L. Nie ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (11)IOP
摘要:The oscillations of poloidal plasma flows induced by radially sheared zonal flows are investigated by newly developed correlation Doppler reflectometers in the HL-2A tokamak. The non-disturbing diagnostic allows one to routinely measure the rotation velocity of turbulence, and he...
作者:R. Ke , M. Xu ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (2)IOP
摘要:The cross phase between radial velocity perturbation and poloidal velocity perturbation plays an important role in the radial distribution of Reynolds stress. Recently, a novel theory of cross-phase dynamics predicts that, depending on the strength of the E × B shearing, the...
作者:R. Ke , B.D. Yuan ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (3)IOP
摘要:Systematic calibration experiment of Langmuir probe sheath potential coefficient Λ, which is a critical coefficient for estimating plasma sheath potential, has been carried out in the HL-2A tokamak deuterium plasmas. The electron energy probability function (EEPF) shows that...
作者:R. Ke , D. Guo ...
来源:[J].Journal of Instrumentation(IF 1.869), 2018, Vol.13 (03)IOP
摘要:A new gas puff imaging (GPI) diagnostic has been developed on the HL-2A tokamak to study two-dimensional plasma edge turbulence in poloidal vs. radial plane. During a discharge, neutral helium or deuterium gas is puffed at the edge of the plasma through a rectangular multi\nobrea...
作者:R. Ke , T. Long ...
来源:[J].Journal of Instrumentation(IF 1.869), 2018, Vol.13 (10)IOP
摘要:Diffraction effects of diagnostic windows and a phase plate are evaluated in sets of phase contrast imaging (PCI) systems on HL-2A tokamak. Results show that wave field of an incident laser with shorter wavelength is less effected by diffraction. The diameter of viewing wind...
作者:R. Ke , M. Xu ...
来源:[J].Journal of Instrumentation(IF 1.869), 2018, Vol.13 (10)IOP
摘要:Neutral beam (NB) attenuation and beam emission are important aspects for Beam Emission Spectroscopy diagnostic on magnetic confinement devices. In this article, we present the simulation of beam attenuation and beam emission in typical HL-2A discharge scenarios, i.e. Low mo...
作者:R. Ke , Y. Wu ...
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (1)IOP
摘要:Edge shear flow and its effect on regulating turbulent transport have long been suspected to play an important role in plasmas operating near the Greenwald density limit n G. In this study, equilibrium profiles as well as the turbulent particle flux and Reynolds stress...

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