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Non-Gaussian Spread Function of a Polycapillary Lens with Longitudinal Defocusing

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Optoelectronics, Instrumentation and Data Processing Aims and scope

Abstract

We have tried to accurately describe and generalize spatial distribution of the spread function for different cases of alignment of an X-ray polycapillary lens in angular and transverse coordinates. A series of experiments is carried out to determine the spread function of the lens in the areas corresponding to significant changes of the area of its focus in the longitudinal direction. An analysis of the results allowed us to propose two approximating models that can potentially approximate spread function with satisfactory accuracy for most typical cases of lens adjustment. A detailed analysis of the results of three series of experiments to determine the SF in a vast region of space with different cases of adjustment of a polycapillary lens made it possible to show that the models are universal and in good agreement with experimental SF distribution.

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ACKNOWLEDGMENTS

Experiments to determine the spread function were carried out on the Local and Scanning XRD-SR station of the VEPP-3M facility at the Siberian Center for Synchrotron and Terahertz Radiation (SCSTR) (unique identifier is UNU RFMEFI62119X0022) and the RT-MT station of the VEPP-3M facility (Kurchatov Acceleration-Storage Complex of Specialized Synchrotron Radiation Source (KISI-Kurchatov)) at the Kurchatov Complex for Synchrotron and Neutron Investigations (unique identifier is UNU RFMEFI61914X0002).

Funding

This work was supported by the Russian Foundation for Basic Research, project no. 19-05-50046.

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Authors and Affiliations

  1. Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, 630073, Novosibirsk, Russia

    D. S. Sorokoletov, Ya. V. Rakshun & F. A. Dar’in

  2. National Research Center Kurchatov Institute, 123182, Moscow, Russia

    A. A. Gogin

Authors
  1. D. S. Sorokoletov
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  2. Ya. V. Rakshun
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  3. F. A. Dar’in
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  4. A. A. Gogin
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Corresponding author

Correspondence to D. S. Sorokoletov.

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The authors declare that they have no conflicts of interest.

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Translated by I. Obrezanova

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Sorokoletov, D.S., Rakshun, Y.V., Dar’in, F.A. et al. Non-Gaussian Spread Function of a Polycapillary Lens with Longitudinal Defocusing. Optoelectron.Instrument.Proc. 58, 55–60 (2022). https://doi.org/10.3103/S8756699022010113

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  • DOI: https://doi.org/10.3103/S8756699022010113

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