| 用于几keV能点动态成像诊断的KB-KBA混合型光学系统设计 |
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| 引用本文： | 章逸舟,穆宝忠,伊圣振,王新,王占山,曹柱荣,刘慎业,丁永坤.用于几keV能点动态成像诊断的KB-KBA混合型光学系统设计[J].强激光与粒子束,2014,26(5):052002-135. |
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| 作者姓名： | 章逸舟 穆宝忠 伊圣振 王新 王占山 曹柱荣 刘慎业 丁永坤 |
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| 作者单位： | 1.同济大学 先进微结构材料教育部重点实验室, 上海 200092; |
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| 基金项目： | 国家自然科学基金项目(11305116, 11110598) |
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| 摘 要： | 围绕激光ICF研究中几keV能点的动态成像诊断需求,提出了具有大视场、高空间分辨、高集光效率和谱分辨特性的新型KB-KBA混合型光学结构。该结构以子午方向上两块单层膜球面镜校正像差,实现大视场内的高空间分辨;在弧矢方向上用一块多层膜球面镜聚焦,以保证较高的集光效率和谱分辨能力。该结构克服了传统单层膜和周期膜KBA结构在几keV能点动态成像诊断中存在的集光效率低,强度不均匀和有效视场受限等不足。针对2.5 keV和4.3 keV两个能点,给出了光学初始结构和膜系的设计,建立了考虑膜系反射性质的光线追迹模型。模拟结果表明,该KB-KBA混合型结构在子午方向1.4 mm视场内空间分辨均优于5μm,有效集光效率优于2×10~(-7)sr,可以满足动态成像诊断的需求。
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| 关 键 词： | KB显微镜 KBA显微镜 动态成像诊断 周期多层膜 光学设计 |
| 收稿时间： | 2013/6/18 |
Design of mixed KB-KBA microscope for multi-keV dynamic imaging diagnostics |
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| Affiliation: | 1.Key Laboratory of Advanced Micro-structured Materials,Ministry of Education, Tongji University,Shanghai 200092,China;2.Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China |
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| Abstract: | A type of mixed KB-KBA microscope for dynamic imaging diagnostics at multi-keV was proposed to obtain large field, high spatial resolution, high light efficiency and spectral resolution. It consists of two spherical mirrors with single-layer in tangential direction to obtain high spatial resolution and a spherical mirror with periodic multilayer in sagittal direction to ensure high light efficiency and spectral resolution. The problems of low effective solid angle, uneven brightness and limited effective object field existing in traditional single-layer and periodic multilayer KBA microscope for dynamic imaging diagnostics at multi-keV were solved. The optical design of mixed KB-KBA microscope at 2.5 keV and 4.3 keV was carried out by the ray-tracing model under the consideration of thin-films reflectance, and the spatial resolution better than 5 m within 1.4 mm object field in tangential direction and effective solid angle larger than 210-7 sr were achieved. |
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| Keywords: | KB microscope KBA microscope dynamic imaging diagnostics periodic multilayers optical design |
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