中国激光, 2010, 37 (1): 200, 网络出版: 2010-01-16
激光驱动瑞利泰勒不稳定性实验研究中的数据处理
Experimental Data Processing on Laser Drive Rayleigh-Taylor Instability
数据处理 瑞利泰勒不稳定性 快速傅里叶变换 激光驱动 惯性约束聚变 data processing Rayleigh-Taylor instability fast Fourier transform laser-drive inertial confinement fusion
摘要
建立了一套激光驱动瑞利泰勒(R-T)不稳定性正向诊断实验数据的处理流程和方法,主要包括:利用拟合背光曲线的方法扣除背光的不均匀性;采用快速傅里叶变换(FFT)方法对数据进行光滑化处理(去除高频噪声)后得到探针穿越调制靶后的强度信息;结合R-T不稳定性的物理模型,给出R-T不稳定性随时间演化的一些物理规律。并使用这套方法,对神光II装置上取得的直接驱动铝平面调制靶动态诊断实验原始数据进行了处理,并从中得到了光学厚度和增长振幅等物理量随时间的演化规律。
Abstract
A method of data processing has been established for the face-on backlit experimental results of laser ablative Rayleigh-Taylor (R-T) instability. First the backlight curve is fitted to eliminat nonuriformity of backlight;then the R-T experimental data was smoothed by the fast Fourier transform (FFT) method (to remove the high-frequency noise) to get intensity data after the probe passing through the target;with the physical model of the R-T growth for the backlit contrast (the peak-to-valley modulation),the temporal evolvement of the R-T growth factor is obtained. With the method,original data which is obtained directly from the Shenguang Ⅱ facility driving aluminum plate target dynamic diagnosis,is processed,and the temporal evolvement of optical depth and growing amplitude are obtained.
贾果, 傅思祖, 董佳钦, 舒桦, 熊俊, 顾援. 激光驱动瑞利泰勒不稳定性实验研究中的数据处理[J]. 中国激光, 2010, 37(1): 200. Jia Guo, Fu Sizu, Dong Jiaqin, Shu Hua, Xiong Jun, Gu Yuan. Experimental Data Processing on Laser Drive Rayleigh-Taylor Instability[J]. Chinese Journal of Lasers, 2010, 37(1): 200.