CAJ | 학술논문

利用往返式朗缪尔探针组在HL-2A装置等离子体边缘首次同时观测到明显的低频(f=0～5kHz)和测地声模(f=16kHz)带状流的极向和环向对称性(m～0,n～0),径向结构及其传播特征.并同时推算出流的径向波矢(K_(r-LF)=0.6 cm~(-1),K_(r-GAM)=2cm~(-1)).双谱分析的结果表明低频和测地声模带状流的形成可能都是由于高频湍流和这种流之间的非线性三波耦合引起的.初步研究了电子回旋加热功率和边界安全因子引起带状流幅度的变化.此外,也观测了带状流幅度在径向方向的改变.
이용왕반식랑무이탐침조재HL-2A장치등리자체변연수차동시관측도명현적저빈(f=0～5kHz)화측지성모(f=16kHz)대상류적겁향화배향대칭성(m～0,n～0),경향결구급기전파특정.병동시추산출류적경향파시(K_(r-LF)=0.6 cm~(-1),K_(r-GAM)=2cm~(-1)).쌍보분석적결과표명저빈화측지성모대상류적형성가능도시유우고빈단류화저충류지간적비선성삼파우합인기적.초보연구료전자회선가열공솔화변계안전인자인기대상류폭도적변화.차외,야관측료대상류폭도재경향방향적개변.
The toroidal and poloidal symmetries(m～0, n～0) of the measured low frequency zonal flows (f =0～5kHz) and geodesic acoustic mode zonal flow(f=16kHz) electric potential and radial promulgate features were unambiguously identified with displaced Langmuir probe arrays in the edge plasma of the HL-2A tokamak for the first time. The finite radial wave vector (K_(r-LF)=0.6cm~(-1), K_(r-GAM)=2cm~(-1))of the flows was simultaneously estimated. The formation mechanism of the flows is identified to be nonlinear three wave coupling between high frequency turbulent fluctuations and the flows. Changes of zonal flow amplitude bring by ECRH power and the boundary safety factors were simply studied. Moreover, change of zonal flow amplitude in radial direction was too observed.