HL-1M弹丸加料等离子体中的蛇形振荡  

Snake-like oscillations in the HL-1M pellet-fueled plasma

作　　者：刘仪[1] 郭干城[1] 付炳忠[1] 肖正贵[1] 董云波[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》2004年第3期161-166,共6页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(10075014)

摘　　要：根据PIN光二极管阵列探测器所探测到的1～10keV能量范围的软X射线辐射扰动,研究了HL 1M装置等离子体中在多发弹丸注入条件下产生的蛇形振荡不稳定性特性,对其机制进行了仔细讨论。实验表明,在中等密度欧姆放电中,高速弹丸注入能直接在等离子体芯部激发出蛇形振荡。对于较高密度的放电,在弹丸加料等离子体的后续演变中经常观测到锯齿稳定化结束时诱发出的准稳态大幅度蛇形振荡。The essential feature of snake-like oscillations observed in pellet-fueled discharges on the HL-1M has been investigated with soft X-ray measurements in the range of 1～10keV energy using a PIN photon diode array.Possible mechanisms of snake-like oscillation are discussed.In medium density discharges,snakes are observed after injection of high velocity solid pellets ablated in the central region of plasma.A large,long living snake is frequently observed at the end of sawtooth-stabilization discharge exhibiting highly peaked pressure profile at early time following the pellet injection in high density discharges.

关 键 词：HL-1M弹丸加料 等离子体 蛇形振荡 软X射线 欧姆放电 

分 类 号：O536[理学—等离子体物理]