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Calculation of the Reflection Coefficient of Multilayer X-Ray Mirrors for Sources Based on Inverse Compton Scattering

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Abstract

It is shown that the use of traditional multilayer X-ray Pt/C mirrors with a periodic gradient only along the direction of propagation of the central X-ray beam, so-called Goebel mirrors, with a source based on the inverse Compton effect, leads to a significant loss of reflected intensity. The efficiency of such mirrors will be about 2% of the total power of the source. To solve this problem, a new approach is proposed based on the use of a set of multilayer mirror strips with different profiles, widths, and periods determined by the parameters of the incident radiation. This work describes the method proposed by us for calculating the period distribution over the mirror surface. The calculation parameters are: the angular dependence of the source photon energy, the mirror size, the distance from the source to the center of the mirror, and the central angle of incidence of radiation on the mirror. The developed method for calculating the periods of a multilayer X-ray mirror is demonstrated by the example of solving a specific problem of X-ray reflection from a source based on the inverse Compton effect, considered earlier in publications. It is noted that in order to apply the technique described in the article when constructing mirrors, it will be necessary to resort to lithography, since obtaining a set of mirrors described in the work using magnetron sputtering seems to be extremely difficult to implement.

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Funding

The work was supported by the Russian Science Foundation, grant no. 21-72-30 029.

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Authors and Affiliations

  1. Institute for Physics of Microstructures, Russian Academy of Sciences, 603087, Nizhny Novgorod, Russia

    S. S. Morozov, S. A. Garakhin & N. I. Chkhalo

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  1. S. S. Morozov
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  2. S. A. Garakhin
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  3. N. I. Chkhalo
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Correspondence to S. A. Garakhin.

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Morozov, S.S., Garakhin, S.A. & Chkhalo, N.I. Calculation of the Reflection Coefficient of Multilayer X-Ray Mirrors for Sources Based on Inverse Compton Scattering. J. Surf. Investig. 17 (Suppl 1), S250–S258 (2023). https://doi.org/10.1134/S1027451023070340

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