Two-dimensional hard X-ray beam compression by combined focusing and waveguide optics
Two-dimensional hard X-ray beam compression by combined focusing and waveguide optics
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DOI：
10.1103/physrevlett.94.074801
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发表时间：
2005-02-25
影响因子：
8.6
通讯作者：
Salditt, T
中科院分区：
文献类型：
--
作者：
Jarre, A;Fuhse, C;Salditt, T
二维限制X射线通道波导结构与高增益Kirkpatrick-Baez预聚焦镜系统相结合，产生横截面为25 x 47 nm（2）（FWHM）的硬X射线束。与先前采用的谐振光束耦合方案不同，入射光束从波导的前侧耦合进来，并且波导光束不再伴随有虚假的反射或透射光束。数值计算了波导通道内的场分布。计算的透射率和远场光强分布与实验结果符合得很好。
A two-dimensionally confining x-ray channel waveguide structure is combined with a high gain Kirkpatrick-Baez prefocusing mirror system yielding a hard x-ray beam with a cross section of 25 x 47 nm(2) ( FWHM). Unlike the previously employed resonant beam coupling scheme, the incoming beam is coupled in from the front side of the waveguide and the waveguided beam is no longer accompanied by spurious reflected or transmitted beams. The field distribution in the waveguide channel has been calculated numerically. The calculated transmission and far-field intensity pattern are in good agreement with the experimental results.