Recent developments in X-ray lens modelling with SRW

Rafael Celestre; Oleg Chubar; Thomas Roth; Manuel Sanchez del Rio; Raymond Barrett

doi:10.1117/12.2567947

21 August 2020 Recent developments in X-ray lens modelling with SRW

Rafael Celestre, Oleg Chubar, Thomas Roth, Manuel Sanchez del Rio, Raymond Barrett

Proceedings Volume 11493, Advances in Computational Methods for X-Ray Optics V; 114930J (2020) https://doi.org/10.1117/12.2567947
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

The advent of 4th generation high-energy synchrotron facilities (ESRF-EBS and the planned APS-U, PETRA-IV and SPring-8 II) and free-electron lasers (Eu-XFEL and LCLS-II) allied with the recent demonstration of high- quality free-form refractive optics for beam shaping and optical correction have revived interest in compound refractive lenses (CRLs) as optics for beam transport, probe formation in X-ray micro- and nano-analysis as well as for imaging applications. Ideal CRLs have long been made available in the 'Synchrotron Radiation Workshop' (SRW), however, the current context requires more sophisticated modelling of X-ray lenses. In this work, we revisit the already implemented wave-optics model for an ideal X-ray lens in the projection approximation and propose modifications to it as to allow more degrees of freedom to both the front and back surfaces independently, which enables to reproduce misalignments and manufacturing errors commonly found in X-ray lenses. For the cases where simply tilting and transversely offsetting the parabolic sections of a CRL is not enough, we present the possibility of generating the figure errors by using Zernike and Legendre polynomials or directly adding metrology data to the lenses. We present the effects of each new degree of freedom by calculating their impact on point spread function and the beam caustics.

Conference Presentation

Citation Download Citation

Rafael Celestre, Oleg Chubar, Thomas Roth, Manuel Sanchez del Rio, and Raymond Barrett "Recent developments in X-ray lens modelling with SRW", Proc. SPIE 11493, Advances in Computational Methods for X-Ray Optics V, 114930J (21 August 2020); https://doi.org/10.1117/12.2567947

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