A discrepancy between the energy input into the plasma and the energy lost through the measured loss channels is observed in the Gas Dynamic Trap (GDT): while 2-3 megawatts of power are captured by the plasma from the neutral beams, the observed energy losses do not exceed hundreds of kilowatts. In this study, a proposal was investigated that a part of the input energy is lost on the limiters of the GDT. The proposal was based on numerical modelling results that predict an existence near the limiter of a peak of power transferred to the plasma via fast ion drag. The experimental results showed that the energy losses on the limiter are too small to explain the energy balance discrepancy and further investigations of large loss channels are required.

The paper analyzes the results of the first experiments to obtain the design parameters of the RF cannon beam of the linear accelerator of the Siberian Ring Synchrotron Radiation Source (SKIF) and describes the diagnostic methods used in this case. The studied parameters include the transverse and longitudinal profiles of the beam, its emittance, energy and energy spread, current, charge and particle losses. The obtained values are compared with the numerical simulation data.

BINP SB RAS together with RFNC-VNIITF carry out a research in the field of creating new sources of electromagnetic radiation in the THz range. Within the framework of this article, a project of the THz beam-plasma generator based on an electron beam generated by a linear induction accelerator is presented. The article provides generator scheme and describes the main elements of the electron beam formation system. In addition, the results of modeling the beam transport and its cross-section compression are presented. These calculations were performed under the current up to 1 kA and energy up to 1 MeV for the subsequent injection of the beam into the plasma section with plasma density up to 1015 –1016 cm–3. The article also contains the analysis of previous experimental studies results which are connected with the beam-plasma interaction for various beam and plasma parameters. Based on this analysis, a requirement for the ratio of the beam and plasma electron densities was formulated. This requirement should be satisfied for creation of the beam-plasma generator of EM radiation for the range of 0.1–1 THz with a pulse power of several MW.

Tests of a conical-spherical body in a supersonic wind tunnel were carried out on a free oscillation installation along the pitch angle at a Mach number M = 1.75 and two moments of inertia of the body relative to the axis of rotation. For a body with a large moment of inertia, self-oscillations with the amplitude of ca. 10 deg were obtained. For the first time, the phenomenon of degeneration of self-oscillations for a body with a smaller moment of inertia has been discovered. An attempt was made to model the phenomenon using an ordinary linear differential equation of the first order

Mono-crystal films of a graded-gap solid solution Si_1-x-yGe_xSn_y on Si <111>substrates were grown by liquid-phase epitaxy from a limited tin solution-melt in the temperature range 500–1100 °C. The chemical composition of the grown epitaxial films was determined using a scanning electron microscope.

The effect of hydrostatic compression on the elastic and electronic properties of β-glycine crystals has been studied by quantum-chemical modeling. A relationship has been established between changes in the microscopic quantum pressure, macroscopic compressibility, and also the geometric and energy characteristics of hydrogen bonds that form the structure of β-glycine crystals before and after the transition to the high-pressure β’-phase.