HL-2A偏滤器位形的边缘等离子体特性  

Edge plasma characteristics of divertor configuration in HL-2A tokamak

作　　者：洪文玉[1] 严龙文[1] 钱俊[1] 潘宇东[1] 罗萃文[1] 徐征宇[1] 潘莉[1] 杨青巍[1] 黄渊[1] 

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2006年第2期81-86,共6页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(10375020;10235010)

摘　　要：通过中平面活动10探针组、往复快速扫描4探针和低杂波天线口的固定4探针测量了主等离子体边缘的温度、密度、悬浮电位、径向和极向电场、雷诺协强、径向和极向等离子体流速及其径向分布。用偏滤器靶板上的14组嵌入式静电3探针阵列测量了同一环向截面的内外中性化板上的电子温度、密度、悬浮电位及其分布。比较了在孔栏位形和偏滤器位形下边缘等离子体特性的差异,特别是两种位形下边缘温度和密度衰减长度的变化。分析了在多脉冲超声分子束加料和低杂波注入条件下的边界等离子体特性,以及雷诺协强的径向梯度与极向流和径向电场梯度与湍流损失的相互关系。Edge plasma temperature, density, poloidal electric field, radial electric field, Reynolds stress, poloidal rotation velocities and their profiles have been obtained using a movable array of Mach/Reynolds stress/Langmuir 10-probes and reciprocating fast scanning 4-probes in plasma discharges. Measurement results are used to analyze plasma confinement, fluctuations and their correlation. The fixed flush 3-probe arrays, mounted on the 4 divertor neutralization plates at the same toroidal cross-section in divertor chamber, are used to measure the profiles of the electron temperature, density and float potential. The profiles and decay lengths of energy or particle flow can be estimated from plasma temperature and density. Edge plasma behaviors between limiter and divertor configuration are compared. Edge characteristics are analyzed in discharges with supersonic molecular beam injection and lower hybrid current drive respectively. The dependence of the radial gradient of Reynolds stress on poloidal flow and the radial gradient of electric field on turbulent loss is discussed.

关 键 词：粒子约束 往复扫描探针 超声分子束加料 低杂波电流驱动 

分 类 号：TL656[核科学技术—核技术及应用]