HT-7装置软X射线诊断系统及锯齿行为研究  

Study on sawtooth activities of HT-7 tokamak using soft X-ray diagnostic

作　　者：段艳敏[1] 陈开云[1] 胡立群[1] 

机构地区：[1]中国科学院等离子体物理研究所,合肥230031

出　　处：《核聚变与等离子体物理》2008年第2期105-110,共6页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(10675124)

摘　　要：利用HT-7装置上建立的多阵列软X射线诊断系统对等离子体放电中的锯齿不稳定性进行研究,发现锯齿的出现及其行为特点与等离子体电子密度Ne、电子温度Te、边界安全因子qα、壁条件等放电参数有密切关系。在低杂波电流驱动等离子体放电条件下,观察到m/n=1/1的中间模振荡出现在锯齿的上升阶段,并迅速发展、饱和、衰减,在锯齿塌陷或先兆振荡出现以前消失。分析和讨论了欧姆加热条件下和低杂波加热条件下的锯齿行为。Several arrays of soft X-ray diagnostic are developed on the HT-7 tokamak and used to study the sawtooth oscillations. The occurrence and characteristics of the sawtooth are related closely with the discharge conditions such as electron density Ne, electron temperature Te, safety factor q, on the plasma edge, as well as the wall condition, etc. In lower hybrid current drive （LHCD） plasmas, an mln=lll mid-mode oscillation can be observed, which appears during sawtooth ramps, rapidly-develops, saturates, damps and disappears before the sawtooth collapse. The sawtooth behaviors in ohmically heated plasma and LHCD plasma are discussed and summarized.

关 键 词：锯齿振荡 软X射线诊断 低杂波电流驱动 等离子体 

分 类 号：O536[理学—等离子体物理] TL65[理学—物理]