HL－1装置几种锯齿崩溃机制的层析摄影研究  

TOMOGRAPHIC RESEARCH ON SAWTOOTH CRASH MECHANISM IN THE HL 1 TOKAMAK

作　　者：董贾福[1] 郭干城[1] 钟云泽 严龙文[1] 杨光 刘仪[1] 付炳忠[1] 

机构地区：[1]核工业西南物理研究院

出　　处：《核聚变与等离子体物理》1996年第4期14-21,共8页Nuclear Fusion and Plasma Physics

摘　　要：本文采用二维层析摄影技术研究了ＨＬ－１装置几种锯齿崩溃的机制。在高密度欧姆放电中，观测到在类锯齿崩溃时，对流泡对中心热心的挤压。在纯欧姆放电中，观测到长达４４ｍｓ的大锯齿，在崩溃时出现了强的对流和冷泡对等离子体柱的扰动，并可能发生与其它磁流体不稳定模式的耦合作用。在微波反锯齿振荡和相对应的软Ｘ射线反锯齿振荡的研究中。Mechanisms of sawtooth crash in HL 1 tokamak have been investigated by using the soft x ray and tomographic technique. For the sawthooth like crash caused by an m=2 mode during high density discharges, it is shown that a hydrodynamic flow exists in the plasma. For the monster sawtooth crash in an Ohmic discharge, the hot core is squeezed by a cold flow and broken into two sections which then become crescents. During lower density discharges, inverse sawteeth superimposed on the microwave and soft x ray signals are observed. The magnetic surface for an soft x ray emission changes its profile to an ellipse from a circular when the inverse sawteeth burst suddenly.

关 键 词：层析摄影 锯齿崩溃机制 托卡马克装置 

分 类 号：TL631.24[核科学技术—核技术及应用]