XXIX Symposium "Nanophysics and Nanoelectronics" in Nizhny Novgorod, March 10-14, 2025
Experimental instruments and technique

Kirkpatrick–Baez focusing system for synchrotron applications

D. G. Reunov^a, A. D. Akhasalyan^a, E. I. Glushkov^a, I. P. Dolbnya^b, I. G. Zabrodin^a, I. A. Kas'kov^a, I. V. Malyshev^a, M. S. Mikhailenko^a, E. V. Petrakov^a, A. E. Pestov^a, V. N. Polkovnikov^a, A. K. Chernyshev^a, N. I. Chkhalo<sup>a

a</sup> Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
^b Diamond Light Source, United Kingdom, OX11 0DE, Oxfordshire, Didcot, Harwell Science and Innovation Campus

Abstract: The paper describes the Kirkpatrick–Baez focusing system for the 4+ generation synchrotron source based on the Siberian Ring Photon Source. The system is designed to operate in the photon energy range of 10–30 keV and should provide a submicron-sized focusing spot. The design principles and composition of the focusing system, as well as the technique for measuring the focusing spot size are reported. A brief description of the key problems and methods used in creating this system is given. The results of testing the focusing properties of the system obtained using a laboratory setup and the first experimental set of elliptical mirrors are presented. The minimum focusing spot size was about 5.2 $\mu$m, which, taking into account the size of the laboratory source and the quality of the collimating optics of the setup, will correspond to a focusing spot of about 2.6 $\mu$m on the synchrotron. The reasons for the discrepancy between the calculated and experimental data are discussed.

Keywords: synchrotron, ring photon source, focusing, Kirkpatrick–Baez system.

Received: 29.05.2025
Revised: 29.05.2025
Accepted: 29.05.2025

DOI: 10.61011/JTF.2025.10.61349.124-25n

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