HT-7装置软X射线诊断系统及锯齿行为研究

核聚变与等离子体物理 ›› 2008, Vol. 28 ›› Issue (2): 105-110.

HT-7装置软X射线诊断系统及锯齿行为研究

段艳敏，陈开云，胡立群

(中国科学院等离子体物理研究所，合肥 230031)

收稿日期:2007-08-17 修回日期:2008-02-26 出版日期:2008-06-15 发布日期:2011-02-21
作者简介:段艳敏(1981-)，女，汉族，山东聊城人，核技术及应用专业硕士，主要从事等离子体物理实验方面的工作。
基金资助:
国家自然科学基金资助项目(10675124)

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

DUAN Yan-min, CHEN Kai-yun, HU Li-qun

(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031)

Received:2007-08-17 Revised:2008-02-26 Online:2008-06-15 Published:2011-02-21

摘要/Abstract

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N_e、电子温度T_e、边界安全因子q_α、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。

关键词: 锯齿振荡, 软X射线诊断, 低杂波电流驱动, 等离子体

Abstract:

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 N_e, electron temperature T_e, safety factor qα on the plasma edge, as well as the wall condition, etc. In lower hybrid current drive (LHCD) plasmas, an m/n=1/1 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.

Key words: Sawtooth oscillation, Soft X-ray diagnostics, LHCD, Plasma

中图分类号:

O536
TL65

段艳敏，陈开云，胡立群. HT-7装置软X射线诊断系统及锯齿行为研究[J]. 核聚变与等离子体物理, 2008, 28(2): 105-110.

DUAN Yan-min, CHEN Kai-yun, HU Li-qun. Study on sawtooth activities of HT-7 tokamak using soft X-ray diagnostic[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2008, 28(2): 105-110.

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