| HL－1装置几种锯齿崩溃机制的层析摄影研究 |
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| 引用本文： | 董贾福,郭干城,钟云泽,严龙文,杨光,刘仪,付炳忠.HL－1装置几种锯齿崩溃机制的层析摄影研究[J].核聚变与等离子体物理,1996(4). |
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| 作者姓名： | 董贾福 郭干城 钟云泽 严龙文 杨光 刘仪 付炳忠 |
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| 作者单位： | 核工业西南物理研究院 |
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| 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，观察到了软Ｘ射线辐射截面从一个圆变成一个椭圆的现象
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| 关 键 词： | 层析摄影 锯齿崩溃机制 磁流体不稳定性 |
TOMOGRAPHIC RESEARCH ON SAWTOOTH CRASH MECHANISM IN THE HL 1 TOKAMAK |
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| DONG,Jiafu,GUO,Gancheng,ZHONG,Yunze,YAN,Longwen,YANG,Guang,LIU,Yi,FU,Bingzhong.TOMOGRAPHIC RESEARCH ON SAWTOOTH CRASH MECHANISM IN THE HL 1 TOKAMAK[J].Nuclear Fusion and Plasma Physics,1996(4). |
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| Authors: | DONG Jiafu GUO Gancheng ZHONG Yunze YAN Longwen YANG Guang LIU Yi FU Bingzhong |
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| Abstract: | 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. |
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| Keywords: | Soft x ray sawtooth oscillation Crash machanism tomography |
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