Rustem V. Fedorchuk

Investigation of synchrotron-radiation beam turning using a cylindrical surface

AbstractWe report theoretical and experimental investigations of the x-ray properties of concave cylindrical mirrors for the soft x-ray (SX) band. Elements of this type facilitate solutions of many problems in the control of synchtrotron-radiation (SR) beams. These include: operation of SR channels; production of a vertical SR beam; transmission of an SR beam to another horizontal plane (to the second story); effective filtering-out of short-wave radiations. We describe the main features of deflection of SX beams by concave surfaces. The angular and spatial distributions of the radiation intensity at the exit from a cylindrical mirror are analyzed by the tridiagonal method. Experimental results are presented on the rotation of an SR beam through 90° by a cylindrical mirror with a reflecting carbon coating. The efficiency of the SR transfer was investigated in wide range

Optical luminescence of solids under focusing of soft x rays by capillary systems

\underset{\raise0.3em\hbox{

Synchrotron radiation focusing by means of Kumakhov lenses

\smash{\scriptscriptstyle-}

Passage of synchrotron radiation through capillary macrosystems

}}{\lambda }

Enhancement of optical luminescence of solids using a capillary lens

∼10–100Å, and furthermore the angular and spectral distributions at the exit of the rotary mirror were measured. The influence of a thin carbon film covering the refecting surface on the x-ray and optical parameters of the cylindrical lens are discussed in the conclusion.

Capillary optics: experimental study by the S-60

In the last years several coherent phenomena associated with the propagation of soft x-ray synchrotron radiation through capillary optical elements (polycapillary lenses and systems of capillaries) have been observed and investigated. Interference effects produced by soft x radiation travelling inside assembled capillary systems may be explained in the framework of the wave propagation theory. In this report a theoretical analysis of the dependence of the transmission characteristics by the internal structure of the capillary channel is presented and discussed.

Bending of a synchrotron radiation beam by means of capillary systems

The capillary focusing system has been installed into the entrance arm of the station for time-resolved studying otpical luminescence of solid state materials under soft x- ray excitation. A sensitivity of the installation as well as a spectral resolution of the analyzing monochromator can be strongly enlarged by means of the lens giving a small spot of radiation on the sample with considerably higher photon flux compared with a direct synchrotron radiation beam.

Features of synchrotron radiation focusing by separate capillaries of definite geometry

Results of experiments on focusing of synchrotron radiation by means of Kumakhov lens are presented. For explanation of observed interference structure the wave theory describing channeling radiation is applied.