强激光与粒子束, 2010, 22 (12): 2905, 网络出版: 2011-01-05   

ICF实验软X光能谱的基函数解谱法

Unfolding soft X-ray spectra in ICF experiments with base function method
作者单位
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
摘要
惯性约束聚变实验中, 14通道软X光能谱仪是测量软X射线能谱、等效积分温度和辐射能流时间过程的重要诊断设备。基函数法是还原能谱分布的一种常用方法。通过对双峰谱形的还原,对不同类型基函数的选择、基函数参数的设置和求解方法等影响解谱的因素进行了比较分析。根据大量算例的结果, 使用优化后的基函数和求解方法对实际测量辐射谱进行了计算, 并与透射光栅谱仪的测量结果进行了比较。结果显示,根据谱仪通道响应选择三次样条的节点, 能够较好还原软X射线的能谱。
Abstract
In inertial confinement fusion experiments, three 14-channel soft X-ray spectrometers are used to detect the soft-X-ray spectra and obtain the time history of radiation flux and equivalent temperature. Base function method is one of the unfolding methods. Different parameters of the base functions and different solution methods are compared for the capability to unfold a two-peak predefined spectrum. Based on the unfolding test, the optimized base function and solution method are used to unfold spectrum in our experiment and the results are compared with the measurement of transmission grating spectrometers. The computation and analysis show that iterative method using third-order spline as base function has a better recovery of the soft-X-ray spectrum than other base functions and solution methods.
参考文献

[1] Kornblum H N, Kauffman R L, Smith J A. Measurement of 0.1-3 keV X rays from laser plasmas[J].Review of Scientific Instruments,1986,57(8):2179-2181.

[2] 孙可煦, 杨建国, 郑志坚. 用于激光等离子体诊断的亚仟X 射线能谱仪[J]. 强激光与粒子束, 1990, 2(1):16-22.(Sun Kexu, Yang Jianguo, Zheng Zhijian. A subkeV X-ray spectrometer used in laser plasma interaction experiments.High Power Laser and Particle Beams,1990,2(1):16-22)

[3] Campbell K M, Weber F A, Dewald E L, et al.Omega Ddante soft X-ray power diagnostic component calibration at the National Synchrotron Light Source[J].Review of Scientific Instruments,2004,75(10):3768-3771.

[4] 孙可熙, 易荣清, 黄天喧, 等.软X光能谱仪探测元件响应曲线标定[J].高能物理与核物理, 2001,25(5):448-454.(Sun Kexu, Yi Rongqing, Huang Tianxuan, et al. Calibration of energy response of detection elements for soft X-ray spectrometer.High Energy Physics and Nuclear Physics,2001,25(5):448-454)

[5] 唐永建, 孙可煦, 徐和平, 等. 激光等离子实验中的低能X射线时间谱解谱方法[J].强激光与粒子束, 1991, 3(4):483-492.(Tang Yongjian, Sun Kexi, Xu Heping. An iterative method for unfolding time-resolved soft X-ray spectra of laser plasmas.High Power Laser and Particle Beams,1991,3(4):483-492)

[6] 江少恩, 郑志坚, 孙可煦. 软X光能谱仪的一种新的解谱方法[J]. 计算物理, 2001, 18(3):276-280.(Jiang Shaoen, Zheng Zhijian, Sun Kexu. A new method unfolding spectra for the soft X-ray spectrometer.Chinese Journal of Computational Physics,2001,18(3):276-280)

[7] 王彦飞.反演问题的计算方法及其应用[M].北京:高等教育出版社, 2007.(Wang Yanfei. Computational methods for inverse problems and their applications. Beijing: Higher Education Press, 2007)

[8] Press W H, Teukolsky S A, Vetterling W T, et al. Numerical recipes in C:The art of scientific computing[M].2nd ed. England:Cambridge University Press, 1997.

[9] D’Agostini G. A multidimensional unfolding method based on Bayes’ theorem[J].Nuclear Instruments and Methods in Physics Research A,1995,362:487-498.

[10] Hooke R, Jeeves T A. “Direct search” solution of numerical and statistical problems[J].J Ass Comput Mach,1961,8:212-229.

[11] Holland J.Adaptation in natural and artificial systems[M]. Ann Arbor: MI: The University of Michigan Press,1975.

[12] 刘成海, 陆正强. 激光核聚变中X光解谱方法的光滑化技术[J]. 计算物理, 1985, 2(3):313-320.(Liu Chenghai, Lu Zhengqiang. A smoothing technique in method solved X-ray spectra in laser nuclear fusion.Chinese Journal of Computational Physics,1985,2(3):313-320)

[13] de Boor C.A practical guide to splines[M]. New York:Springer,1977:96-106.

[14] 杨家敏, 丁耀南, 郑志坚, 等. 高谱分辨 X光能谱诊断技术[J]. 强激光与粒子束, 2003, 15(1):69-72.(Yang Jiamin, Ding Yaonan, Zheng Zhijian, et al. High spectral resolution measurement of soft-X-ray spectrum using transmission grating spectrometer.High Power Laser and Particle Beams,2003,15(1):69-72)

宋天明, 杨家敏, 易荣清. ICF实验软X光能谱的基函数解谱法[J]. 强激光与粒子束, 2010, 22(12): 2905. Song Tianming, Yang Jiamin, Yi Rongqing. Unfolding soft X-ray spectra in ICF experiments with base function method[J]. High Power Laser and Particle Beams, 2010, 22(12): 2905.

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