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
作者单位
中国工程物理研究院 上海激光等离子体研究所,上海 201800
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.
参考文献

[1] 叶文华. 激光烧蚀R-T不稳定性线性增长率和非线性行为的数值研究[J]. 强激光与粒子束,1998,10(4):567-572

    Ye Wenhua. Numerical studies of linear growth rates and nonlinear evolution of laser ablative Rayleigh-Taylor insability[J]. High Power Laser and Particles Beams,1998,10(4):567-572

[2] . Shigemori,H. Azechi,M. Nakai et al.. Perturbations transfer from the front to rear surface of laser-irradiated targets[J]. Phys. Rev. E, 2002, 65: 045401.

[3] . Shigemori,H. Azechi,M. Nakai et al.. Measurements of Rayleigh-Taylor growth rate of planar targets irradiated directly by partially coherent light[J]. Phys. Rev. Lett., 1997, 78(2): 250-253.

[4] . Koenig,A. Ravasio,A. Benuzzi-Mounaix et al.. Density measurements of shock compressed matter using short pulse laser diagnostics[J]. Astrophys. Space Sci., 2007, 307: 257-261.

[5] . . First observation of density profile in directly laser-driven polystyrene targets for ablative Rayleigh-Taylor instability research[J]. Physics of Plasmas, 2003, 10(12): 4784-4789.

[6] . J. Pawley,S. E. Bodner. Observation of Rayleigh-Taylor growth to short wavelengths on nike[J]. Physics of Plasma, 1999, 6(2): 565-570.

[7] . G. Glendinning,S. N. Dixit,B. A. Hammel et al.. Measurements of laser-speckle-induced perturbations in laser-driven foils[J]. Phys. Rev. E, 1996, 54(4): 4473-4475.

[8] 张钧,常铁强. 烧蚀引起R-T不稳定性实验条件的初步研究[J]. 强激光与粒子束,1995,7(4):601-607

    Zhang Jun,Chang Tieqiang. Analyses and research for experimental conditions of Rayleigh-Taylor instability in an ablatively accelerating plasma[J]. High Power Laser And Particles Beams,1995,7(4):601-607

[9] 江少恩,黄翼翔,胡昕 等. 用于短波长R-T不稳定性的莫尔条纹成像技术[J]. 光学技术,2007,33(1):59-61

    Jiang Shaoen,Huang Yixiang,Hu Xin et al.. Moire interferometry technique for short wavelength Rayleigh-Taylor instability[J]. Optical Technique,2007,33(1):59-61

[10] . A. Remington,S. W. Haan,S. G. Glendinning et al.. Large growth planar Rayleigh-Taylor experiments on Nova[J]. Phys. Fluids B, 1992, 4(4): 967-978.

[11] . Kreis. Digital holographic interference-phase measurement using the Fourier-transform method[J]. J. Opt. Soc. Am. A, 1986, 3: 847-855.

[12] . A. Remington,S. V. Weber,M. M. Marinak et al.. Single-mode and multimode Rayleigh-Taylor experiments on NOVA[J]. Physics of Plasmas, 1995, 2(1): 241-255.

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.

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