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The paper considers the possibility of using the diamond‐silicon carbide composite Skeleton® with a technological coating of polycrystalline silicon as a substrate for X‐ray mirrors used with powerful synchrotron radiation sources (third+ and fourth generation). Samples were studied after polishing to provide the following surface parameters: root‐mean‐square flatness ≃ 50 nm, micro‐roughness on the frame 2 µm × 2 µm σ ≃ 0.15 nm. The heat capacity, thermal conductivity and coefficient of linear thermal expansion were investigated. For comparison, a monocrystalline silicon sample was studied under the same conditions using the same methods. The value of the coefficient of linear thermal expansion turned out to be higher than that of monocrystalline silicon and amounted to 4.3 × 10−6 K−1, and the values of thermal conductivity (5.0 W cm−1 K−1) and heat capacity (1.2 J K−1 g−1) also exceeded the values for Si. Thermally induced deformations of both Skeleton® and monocrystalline silicon samples under irradiation with a CO2 laser beam have also been experimentally studied. Taking into account the obtained thermophysical constants, the calculation of thermally induced deformation under irradiation with hard (20 keV) X‐rays showed almost three times less deformation of the Skeleton® sample than of the monocrystalline silicon sample. [ABSTRACT FROM AUTHOR]

The results of a study of the structural and reflective characteristics of short-period multilayer X-ray mirrors based on Mo/B4C at wavelengths 1.54 Å, 9.89 Å and 17.59 Å are presented. The period of the samples varied in the range 8-35 Å. The average widths of the interfaces were ~3.5 and 2.2 Å at one and the other boundaries, with a tendency for weak growth with any decrease in the period. The interlayer roughness was ~1 Å. The research results indicate promising prospects for the use of multilayer Mo/B4C mirrors for synchrotron applications. [ABSTRACT FROM AUTHOR]

The paper considers the possibility of using the diamond-silicon carbide composite Skeleton ® with a technological coating of polycrystalline silicon as a substrate for X-ray mirrors used with powerful synchrotron radiation sources (third+ and fourth generation). Samples were studied after polishing to provide the following surface parameters: root-mean-square flatness ≃ 50 nm, micro-roughness on the frame 2 µm × 2 µm σ ≃ 0.15 nm. The heat capacity, thermal conductivity and coefficient of linear thermal expansion were investigated. For comparison, a monocrystalline silicon sample was studied under the same conditions using the same methods. The value of the coefficient of linear thermal expansion turned out to be higher than that of monocrystalline silicon and amounted to 4.3 × 10 -6  K -1 , and the values of thermal conductivity (5.0 W cm -1  K -1 ) and heat capacity (1.2 J K -1  g -1 ) also exceeded the values for Si. Thermally induced deformations of both Skeleton ® and monocrystalline silicon samples under irradiation with a CO 2 laser beam have also been experimentally studied. Taking into account the obtained thermophysical constants, the calculation of thermally induced deformation under irradiation with hard (20 keV) X-rays showed almost three times less deformation of the Skeleton ® sample than of the monocrystalline silicon sample., (open access.)

The results of a study of the structural and reflective characteristics of short-period multilayer X-ray mirrors based on Mo/B 4 C at wavelengths 1.54 Å, 9.89 Å and 17.59 Å are presented. The period of the samples varied in the range 8-35 Å. The average widths of the interfaces were ∼3.5 and 2.2 Å at one and the other boundaries, with a tendency for weak growth with any decrease in the period. The interlayer roughness was ∼1 Å. The research results indicate promising prospects for the use of multilayer Mo/B 4 C mirrors for synchrotron applications., (open access.)