共查询到20条相似文献,搜索用时 93 毫秒
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利用浇注法制备了具有正弦波调制图纹的溴代聚苯乙烯薄膜,并在此基础上将低密度聚-4-甲基-1-戊烯(PMP)泡沫溶胶浇注在薄膜调制图纹的表面,从而得到了薄膜-泡沫复合平面调制靶样品。较为详细的讨论了具有正弦波调制图纹的复合平面调制靶的制备方法并通过台阶仪、显微镜观测了薄膜表面条纹的起伏以及薄膜-泡沫截面的复合情况,实验结果发现,采用此种方法得到的复合平面调制靶样品,其薄膜厚度、泡沫密度易于控制,薄膜、泡沫调制界面清晰,易于微靶的加工与装配。 相似文献
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为了研究惯性约束聚变(ICF)实验用靶丸不同密度界面的流体力学不稳定性增长,设计并制备了聚苯乙烯(CH)/碳气凝胶(CRF),CRF/硅气凝胶(SiO2)和CH/Al三种双介质调制靶。采用溶胶-凝胶工艺制备了密度分别为250和800mg/cm3的CRF气凝胶薄片;采用激光微加工工艺分别在两种不同密度的CRF薄片和工业用纯Al箔上引入调制图形;采用旋涂工艺在Al箔和CRF薄片(250mg/cm3)的调制表面制备一层CH薄膜,得到CH/Al和CH/CRF双介质调制靶,采用溶胶-凝胶工艺在CRF薄片(800mg/cm3)表面制备一层低密度SiO2气凝胶,得到CRF/SiO2双介质调制靶。采用电子天平、扫描电子显微镜、工具显微镜和台阶仪对所制备的CH/CRF,CRF/SiO2和CH/Al三种双介质调制靶进行靶参数测量。结果表明:三种双介质调制靶层与层之间结合紧密,界面清晰,调制图形为正弦,靶参数测量准确。 相似文献
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I. Aleksandrova A. Belolipetskiy E. Koresheva A. Safronov T. Timasheva I. Timofeev S. Tolokonnikov 《Journal of Russian Laser Research》2008,29(5):428-440
The results of mathematical modeling of thermal and mechanical responses of fuel materials in the process of direct drive
target delivery into the reaction chamber are presented. Special attention is paid to the influence of fuel-layer anisotropy
on the layer degradation that is of critical importance for the optimization of the delivery process. 相似文献
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Abstract Experiments carried out demonstrate the production due tosoft X-rays of enhanced ablation pressure. The targets used were planar gold foils. Aluminium targets were also used to demonstrate the relative effect. 相似文献
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As a category of special control points which can be automatically identified, artificial coded targets have been widely developed in the field of computer vision, photogrammetry, augmented reality, etc. In this study, a novel color coded target is designed for vision measurements. A reference position is defined to avoid the repeated coding as well as simplify the coding structure, and a pair of concentric circles is utilized for the precise location of the target. An edge-based identification and location algorithm is proposed for the designed coded target. In this algorithm, a coarse-fine strategy is employed to improve the efficiency and various judgments are made to ensure the correctness of the identification. No human involvement is required except for the adjustment of thresholds in the beginning, which is conducive to the automation of measurement. The algorithm shows high accuracy and robustness in experiments. 相似文献
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