Focusing performance of a multilayer Laue lens with layer placement error described by dynamical diffraction theory

E-ISSN： 1600-5775|22|4|936-945

ISSN： 0909-0495

Source： JOURNAL OF SYNCHROTRON RADIATION (ELECTRONIC), Vol.22, Iss.4, 2015-07, pp. : 936-945

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Abstract

The multilayer Laue lens (MLL) is essentially a linear zone plate with large aspect ratio, which can theoretically focus hard X‐rays to well below 1 nm with high efficiency when ideal structures are used. However, the focusing performance of a MLL depends heavily on the quality of the layers, especially the layer placement error which always exists in real MLLs. Here, a dynamical modeling approach, based on the coupled wave theory, is proposed to study the focusing performance of a MLL with layer placement error. The result of simulation shows that this method can be applied to various forms of layer placement error.