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Reconstruction of Ge spatial distribution in ICF target using PIXE-T

文献类型：期刊论文

作者Lu, H. Y.1; He, X. D.1; Meng, J.2; Guo, N.1; Rong, C. C.1; Zhang, W.1; Zhang, Y. J.1; Wang, Z. W.2; Gao, D. Z.2; Ma, X. J.2
刊名FUSION ENGINEERING AND DESIGN
出版日期2016-12-01
卷号113页码:43-50
关键词PIXE-T ICF target Reconstruction of Ge spatial distribution Correction of X-ray yield
ISSN号0920-3796
DOI10.1016/j.fusengdes.2016.10.006
英文摘要Inertial confinement fusion (ICF) target is a microsphere with diameter at millimeter scale and shell thickness at micrometer scale. Ge-doped glow discharge polymer (GDP) is an ideal material for the target. The homogeneity of dopant is vital for uniform compression and minimization of Rayleigh-Taylor (RT) instabilities in ignition. However, the method of quantitative measurement of dopants' spatial distribution is still not mature. Quantitation is not accurate and image resolution is low. Particle induced X-ray emission tomography (PIXE-T) is a suitable technique for measuring trace elements' spatial distribution in small sample at micrometer scale. This paper demonstrates the capabilities of PIXE-T to obtain quantitative spatial distribution of dopant (Germanium) in ICF target for the first time. We also developed a program run in MATLAB to reconstruct Ge spatial distribution 3D image using Filtered Back Projection (FBP) algorithm. When ion beam is transmitted through the target, its energy is attenuated due to collisions. This energy attenuation causes decrease of X-ray emission cross section. For X-ray emitted from target inside, it will be absorbed by target itself before being collected by detector. Both effects cause loss of X-ray counts, especially at the rear of target toward beam. The program can compensate the loss of X-ray counts caused by these two effects, non-linear X-ray production (NLXP) along the path of the beam and X-ray attenuation (XA). This correction is based on a uniform mass density (1.08 g/cm(3)) and a uniform major composition (stoichiometric ratio C:H =5:7 for GDP material) within the sample. Corrections are applied before tomographic reconstruction, producing a more accurate Ge spatial distribution image. After converting X-ray counts in every voxel to Ge concentration using standard reference material (SRM), the image shows quantitative spatial distribution. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词INERTIAL CONFINEMENT FUSION ; ION MICROSCOPY TOMOGRAPHY ; RAY-EMISSION TOMOGRAPHY ; SOFTWARE PACKAGE ; QUANTITATIVE RADIOGRAPHY ; STIM ; CALIBRATION ; ALGORITHM ; BEAM
WOS研究方向Nuclear Science & Technology
语种英语
WOS记录号WOS:000390733200007
出版者ELSEVIER SCIENCE SA
源URL[http://119.78.100.186/handle/113462/44017]  
专题中国科学院近代物理研究所
通讯作者Shen, H.
作者单位1.Fudan Univ, Inst Modern Phys, Appl Ion Beam Phys Lab, Shanghai 200433, Peoples R China
2.China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
推荐引用方式
GB/T 7714		 Lu, H. Y.,He, X. D.,Meng, J.,et al. Reconstruction of Ge spatial distribution in ICF target using PIXE-T[J]. FUSION ENGINEERING AND DESIGN,2016,113:43-50.
APA Lu, H. Y..,He, X. D..,Meng, J..,Guo, N..,Rong, C. C..,...&Shen, H..(2016).Reconstruction of Ge spatial distribution in ICF target using PIXE-T.FUSION ENGINEERING AND DESIGN,113,43-50.
MLA Lu, H. Y.,et al."Reconstruction of Ge spatial distribution in ICF target using PIXE-T".FUSION ENGINEERING AND DESIGN 113(2016):43-50.

入库方式： OAI收割

来源：近代物理研究所

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