HL－1装置热脉冲传播的傅里叶分析  

FOURIER ANALYSIS OF SAWTOOTH HEAT PULSE PROPAGATION IN THE HL-1 TOKAMAK PLASMA

作　　者：严龙文[1] 石秉仁[1] 郭干城[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》1995年第4期27-33,共7页Nuclear Fusion and Plasma Physics

摘　　要：本文采用一种新提出的数值方法［１］，即傅里叶变换分析法，研究了ＨＬ－１装置中用软Ｘ射线测量得到的锯齿振荡诱导的热脉冲传播行为。此方法不仅可以计算扰动调制的热传导系数，而且可以分析各次谐波的幅值和相位随频率及空间的演变，并与热脉冲峰值时间延迟分析法进行了比较，两者推算的热传导系数符合较好。所得结果和稳态能量平衡方法的推测值也为同一量级。在相似条件下，氘放电的热传导系数比氢小，即同位素效应能改善约束。大量运算结果表明，傅里叶分析法和峰值时间延迟分析法都可用于ＨＬ－１装置热脉冲传播的常规数值分析，并可应用于ＨＬ－１Ｍ的数据处理。In this paper, a recently proposed method for Fourier analysics of sawtooth heat pulse propagation is applied to the HL-1 data. Not only can the method be used to calculate the incremental heat diffusivity, but also to obtain information on the amplitude and the phase of harmonis inviolved. A comparison with other method shows good agreement between the heat diffusivity determined by the arrival time of peak and that estimated by using energy confinement scaling. An isotope effect of improving confinement in the HL-1 tokamak has also been observed.

关 键 词：热脉冲传播 热传导系数 傅里叶分析 托卡马克 

分 类 号：TL631.24[核科学技术—核技术及应用]