Focusing of X-Rays inside a single crystal under the temperature gradient

A method for experimental investigation of the effect of X-ray focusing inside a single crystal subject to temperature gradient is proposed. The definition of diffracted X-ray focusing inside the crystal is shown to increase depending on the value of temperature gradient.     

Spatial modulation of X-rays in the presence of external acoustic field

The two-crystal X-ray diffraction from (111?1) reflecting atomic planes of quartz single crystal with AT-cut was experimentally considered in the Laue geometry, when both the crystals are simultaneously in the field of bulk acoustic waves. It is shown that as a result of spatial modulation of reflected beam an odd number of parallel X-ray beams is obtained.     

Ion Beam Generation in a Vacuum Arc Ion Source with a Multicomponent Cathode

Russian Physics Journal - Vacuum arc ion sources are widely used for modifying the properties of various surfaces using ion implantation. The use of cathodes consisting of multicomponent compounds...     

Control of the parameters of a beam of thermal neutrons

The reflection of thermal neutron beams from a quartz single crystal was investigated in the Laue geometry under the external influences. The controllability of a neutron beam in space and time is analyzed and its parameters are estimated (relative maximum intensity, the angular and energy distribution of obtained beams etc.).     

Tomography Imaging Taking Into Account Spectral Information

A technique for increasing the information content of tomography imaging by using additional information about radiation absorption at various energies is considered. The positive effect of this technique is the determination of the distribution of various components over the sample volume. The technique differs in the fact that initial radiograms taking into account spectral information are obtained for one scanning without tuning irradiation conditions when using a spectrally sensitive matrix detector.     

Plasma Anode Formation in a High-Current Electron Gun with the Use of a Hybrid Discharge

Russian Physics Journal - The paper presents the results of a study of a glow spatial structure and temporal dynamics of a hybrid discharge combining a high-current reflective discharge with vacuum...     

Dynamics of pulsed magnetron discharge in high-current electron guns

High-speed video filming is applied to investigate low-pressure (argon 0.053–0.133 Pa) pulsed gas discharge dynamics in a planar magnetron built-in the explosive emission cathode of a high-current electron gun. It has been found that, in the beginning, the discharge starts at the side surface of the cathode and then spreads to its face. The stability of the discharge ignition instant at the cathode face as a function of the working pressure of the gas and the cathode design has been studied. It has been found that the pulsed longitudinal magnetic field results in the discharge switching over in the axial direction onto the electron gun collector. A qualitative explanation of the observed discharge behavior has been given.