Development of micro-pore optics for x-ray applications
Development of micro-pore optics for x-ray applications
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用于 X 射线应用的微孔光学器件的开发
DOI：
10.1117/12.614939
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Krumrey
中科院分区：
文献类型：
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作者：
K. Wallace;M. Collon;M. Bavdaz;M. Beijersbergen;R. Fairbend;J. Séguy;M. Hoffmann;M. Krumrey
欧空局与Photonis和cosine Research BV合作，一直在开发和测试用于X射线成像的微孔光学器件。预计该技术的应用将减少行星x射线成像仪、x射线计时观测台或高能天体物理学等方面的质量和体积。Photonis是微孔光学设计和开发领域的世界领导者，已经开发出一种制造由挤出玻璃纤维形成的方形通道孔的技术。用可溶性玻璃芯形成的单根正方形纤维被堆叠到成形器中并重新拉伸以形成所需尺寸的多纤维。然后，从通过堆叠多纤维并将它们熔合以形成单片玻璃结构而形成的块切割光学器件的径向扇区。扇区可以被切片、抛光、蚀刻和塌陷以形成具有特定半径的光学部的段。这些扇区中的两个将被安装以形成例如Wolter I光学配置。为了提高通道表面的反射率，还考虑了涂层技术。本文将讨论欧空局和余弦研究公司利用联邦物理技术局BESSY-II同步加速器设施四晶体单色光束线对多纤维、扇形体和塌陷扇形体进行的X射线测试的结果。测试测量确定X射线透射率和聚焦特性，因为它们与整体透射率、通道壁的X射线反射率、纤维的径向对准、塌陷半径和熔融块中的纤维位置有关。还在显微镜和扫描电子显微镜（SEM）下检查了多纤维和扇区，以检查通道壁并确定纤维堆叠的改进。
With Photonis and cosine Research BV, ESA has been developing and testing micro pore optics for x-ray imaging. Applications of the technology are foreseen to reduce mass and volume in, for example, a planetary x-ray imager, x-ray timing observatory or high-energy astrophysics. Photonis, a world leader in the design and development of micro pore optics, have developed a technique for manufacturing square channel pores formed from extruded glass fibres. Single square fibres, formed with soluble glass cores, are stacked into a former and redrawn to form multifibres of the required dimension. Radial sectors of an optic are then cut from a block formed by stacking multifibres and fusing them to form a monolithic glass structure. Sectors can be sliced, polished, etched and slumped to form the segment of an optic with specific radius. Two of these sectors will be mounted to form, for example, a Wolter I optic configuration. To improve reflectivity of the channel surfaces coating techniques have also been considered. The results of x-ray tests performed by ESA and cosine Research, using the BESSY-II synchrotron facility four-crystal monochromator beamline of the Physikalisch-Technische Bundesanstalt (PTB), on multi-fibres, sectors and slumped sectors will be discussed in this paper. Test measurements determine the x-ray transmission and focussing characteristics as they relate to the overall transmission, x-ray reflectivity of the channel walls, radial alignment of the fibres, slumping radius and fibre position in a fused block. The multifibres and sectors have also been inspected under microscope and Scanning electron Microscope (SEM) to inspect the channel walls and determine the improvements made in fibre stacking.