Reconstruction and interpretation of photon Doppler velocimetry spectrum for ejecta particles from shock-loaded sample in vacuum  

作　　者：Xiao-Feng Shi Dong-Jun Ma Song-lin Dang Zong-Qiang Ma Hai-Quan Sun An-Min He Pei Wang 石晓峰;马东军;党松琳;马宗强;孙海权;何安民;王裴(Institute of Applied Physical and Computational Mathematics,Beijing 100094,China;Jiangxi University of Applied Science,Nanchang 330103,China;Center for Applied Physics and Technology,Peking University,Beijing 100871,China)

机构地区：[1]Institute of Applied Physical and Computational Mathematics,Beijing 100094,China [2]Jiangxi University of Applied Science,Nanchang 330103,China [3]Center for Applied Physics and Technology,Peking University,Beijing 100871,China

出　　处：《Chinese Physics B》2021年第6期419-429,共11页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11902043 and 11772065);the Science Challenge Project (Grant No. TZ2016001)。

摘　　要：The photon Doppler velocimetry(PDV) spectrum is investigated in an attempt to reveal the particle parameters of ejecta from shock-loaded samples in a vacuum. A GPU-accelerated Monte–Carlo algorithm, which considers the multiplescattering effects of light, is applied to reconstruct the light field of the ejecta and simulate the corresponding PDV spectrum.The influence of the velocity profile, total area mass, and particle size of the ejecta on the simulated spectra is discussed qualitatively. To facilitate a quantitative discussion, a novel theoretical optical model is proposed in which the singlescattering assumption is applied. With this model, the relationships between the particle parameters of ejecta and the peak information of the PDV spectrum are derived, enabling direct extraction of the particle parameters from the PDV spectrum.The values of the ejecta parameters estimated from the experimental spectrum are in good agreement with those measured by a piezoelectric probe.

关 键 词：EJECTA photon Doppler velocimetry Monte–Carlo algorithm light scattering 

分 类 号：O43[机械工程—光学工程]