A Soft X-ray Source with Focusing Optics for Spectroscopy

该研究计划的目标是研究使用准直光学和过渡辐射源来产生低成本、实验室规模、高强度、聚焦的软X射线光谱源。从使用同步辐射的快速增长中可以看出，材料研究和其他科学和医学研究需要明亮、相对便宜的X射线源。将建造一个X射线系统。该系统由过渡辐射体和准直光学元件组成，这将允许整个辐射锥体聚焦到1-2 mm~2的光斑。灵活的毛细管将允许改变X射线的方向。第一阶段的研究将用于测试光谱源的光学性能和可行性。开发了一个计算机驱动的射线跟踪程序，以优化X射线光学系统的设计。在阿德尔菲的初步实验表明，1-3keV光谱范围内的X射线可以聚焦到距离源1.35米处直径2毫米的光斑。首席研究人员和他的同事首先观测到了过渡辐射体的软X射线，并显示了距离辐射体很远的辐射的聚焦。

The objective of the research program is to investigate the use of collimating optics with a transition-radiation source to produce a low cost, laboratory scale, intense, focused, soft x- ray source for spectroscopy. As has been seen from the rapid rise in the use of synchrotron radiation, bright, relatively inexpensive x-ray sources are needed for materials studies and other scientific and medical research. An x-ray system will be constructed. This system consists of a transition radiator and collimating optics, which will permit the entire radiation cone to be focused to a 1 - 2 mm2 spot. Flexible capillary tubes will permit the direction of the x-rays to be changed. Phase I research will be used to test the optics and the feasibility of the source for spectroscopy. A computer-driven ray-tracing program has been developed to optimize the design of the x-ray optics. Preliminary experiments at Adelphi have shown that x-rays in the 1 - 3 ke V spectra range can be focused to a 2 mm diameter spot at a distance of 1.35 m from the source. The principal investigator and his colleagues were the first to observe soft x- rays from transition radiators and show focusing of the radiation of large distances from the radiator.