A.S. Gogolev

Device for X-ray spectral absorption analysis with use of acoustic monochromator

The method for X-ray elemental analysis and the device for its realization, based on the X-ray absorption spectroscopy technique, are proposed. Estimations of the method sensitivity have been carried out by means of numerical simulation. The simulation results indicate that the sensitivity of the proposed method for elemental analysis is not less than 10−4.

Acoustic "pumping effect" for quartz monochromators

There are investigations of dependences scattered at quartz crystals X-ray in Bragg direction of intensity on amplitude and frequency external alternating electromagnetic field, which initiates acoustic waves in crystal, in spectral mode.

X-Ray Cherenkov Radiation as a Source for Transverse Size Diagnostics of Ultra-relativistic Electron Beams

Development of advanced non-invasive methods for charged particle beam diagnostics is crucial in modern and future accelerators. Therefore, it is essential to develop non-invasive methods to generate EM radiation which properties depend on the beam parameters. In this paper we propose to use X-ray Cherenkov radiation (XCR) which can be generated by ultrarelativistic charged particles in the vicinity of the absorption edges of several materials. Due to a resonant nature of the refractive index near the absorption edges the generated radiation is quasi-monochromatic. On the other hand its properties depend on the parameters of the incident particle beam. In this paper we represent an approach for calculating the XCR generated along with transition radiation and diffraction radiation. The effect of the transverse electron beam size on the XCR characteristics is discussed.

Estimation of the sensitivity in dual wave X-ray absorptiometry

Dual wave X-ray absorptiometry is considered theoretically and the application of suggested technique extends to the multiphase flow analysis. Proposed method allows for specifying dynamically the percentage of fluid components with the resolution as high as 0.25% (according to the mathematical simulating). The accuracy of this measurement is one order higher by magnitude than that provided by the state of the art flow analyzing devices.

Spectral distribution in the reflection of parametric X-rays

The parametric X-ray radiation (PXR) spectra are measured on condition when the angular size of PXR cone is smaller than the angular resolution of the experiment. The PXR is generated under interaction of 50GeV proton beam with silicon crystal in Bragg geometry. The comparison of experimental data with results of developed theoretical model is presented and discussed.