Progress toward fabrication of graded doped beryllium and CH capsules for the National Ignition Facilitya)
Progress toward fabrication of graded doped beryllium and CH capsules for the National Ignition Facilitya)
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DOI：
10.1063/1.2179054
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发表时间：
2006-05
影响因子：
2.2
通讯作者：
A. Nikroo;K. C. Chen;M. Hoppe;Haibo Huang;J. Wall;H. Xu;M. McElfresh;C. Alford;R. Cook;J. Cooley;R. Fields;R. Hackenberg;R. Doerner;M. Baldwin
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文献类型：
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作者：
A. Nikroo;K. C. Chen;M. Hoppe;Haibo Huang;J. Wall;H. Xu;M. McElfresh;C. Alford;R. Cook;J. Cooley;R. Fields;R. Hackenberg;R. Doerner;M. Baldwin
目前的点火设计需要梯度掺杂铍或CH胶囊。本文报道了在国家点火装置（NIF）上制造满足现行设计标准的铍和CH密封舱的进展情况[S。Hann等人，等离子体12，056316（2005）]。NIF尺度的梯度铜掺杂铍胶囊已通过溅射涂层，而梯度锗掺杂CH胶囊已通过等离子体聚合物沉积。用于制造梯度铍壳的溅射工艺产生的空隙率为0.5%。改变沉积参数可以产生几种不同的铍微结构，这些微结构已经被调整以将空隙尺寸和分数降低到规格范围内。此外，铍涂层炮弹的抛光降低了炮弹的外表面粗糙度，使其符合点火规格。透射电子显微镜已被用来表征铍涂层的孔隙率和晶粒结构。血浆...
Current ignition designs require graded doped beryllium or CH capsules. This paper reports on the progress toward fabricating both beryllium and CH capsules that meet the current design criteria for achieving ignition on the National Ignition Facility (NIF) [S. Hann et al., Phys. Plasmas 12, 056316 (2005)]. NIF scale graded copper doped beryllium capsules have been made by sputter coating, while graded germanium doped CH capsules have been made by plasma polymer deposition. The sputtering process used for fabricating graded beryllium shells was produced with a void fraction of ∼5%. Varying the deposition parameters can lead to several different beryllium microstructures, which have been tuned to reduce the void size and fraction to within specifications. In addition, polishing of beryllium-coated shells reduces the outer surface roughness of shells to ignition specifications. Transmission electron microscopy has been used to characterize void fraction and grain structure of beryllium coatings. The plasma ...