In this paper, to characterize the nanostructure of a wide range of oxide dispersion hardened (ODS) steels, small-angle X-ray scattering (SAXS) was used. The investigated steels have different alloying systems differing in the content of Cr, V, Ti, Al, and Zr. It is shown that the use of SAXS allows one to determine the number density of nanoscale inclusions in ODS steels and to determine their size distribution. 

The paper evaluates a possibility of principle to create conditions for mutually profitable influence of fusion neutrons emitted by three-component (D–T–3 He)-plasma and fission neutrons emitted by subcritical blanket. Irradiation of subcritical blanket by fusion neutrons can maintain stationary chain fission reaction while irradiation of plasma by fission neutrons can intensify tritium breeding through 3 He(n,p)T-reaction.

The results of calculating the threshold voltage levels causing multipactor discharge in single-gap buncher cavities at 80 MHz are presented in the article. Two types of gap geometry with an extension from 18 to 25 mm and with an extension from 18 to 80 mm are considered. The results of modeling a multipactor discharge using the MultP-M program are presented.

At present, the intrinsic energy resolution of a scintillation detector is understood by many authors in different ways. The existing formulas for energy resolution differ not only in names, but also in the physical meaning of the processes they take into account. The main drawback of all these theories of scintillation spectrometers is the unjustified introduction of different terms into the formula for the energy resolution without considering their connection with the specific characteristics of the scintillation detector. The intrinsic energy resolution of a scintillation detector is most correctly defined as the unavoidable limit that can be reached when all the parameters of the detector reach their limiting values without their fluctuations. On the basis of the microscopic standard theory of scintillation detectors, it is shown that the intrinsic energy resolution is determined by the light yield nonlinearity and fluctuations in the number of electron–hole pairs.

Atom probe tomography (APT) is a tool for detailed chemical composition analysis of advanced structural material nanostructure. The use of different Atomic Probe Tomography (APT) devices requires a certification of these setups prior to conducting research. In this paper a method of comparing APT setups in order to evaluate the influence of the overall system configuration on the accuracy of obtained data is proposed. The collected data comparison is presented for the aluminum alloy Al–3.3Cu–2.5Mn–0.5Zr and structural steel 16Kh12МVSFBR gathered on the APPLE-3D (“PAZL-3D”) setup and on the new ATLAS (“ATLAZ”) unit, created through upgrading the ECOTAP. Comparison of the results confirms the feasibility of carrying out research of the same material on similar setups without significant distortion of the data under its analysis and interpretation.

Cold neutron source with liquid deuterium moderator for the HEC-2 channel of PIK reactor is considered. Two variants of moderator chamber location in the reactor reflector are compared. It is shown, that the energy release in the chamber strongly increases when it approaches the reactor core. At the same time, the brilliance of the source increases only moderately. The great influence of the displacer in the liquid deuterium chamber of large volume is demonstrated. Cold neutron source brilliance for two positions of the chamber in the reflector is calculated as well as energy release in the chamber and supplying tubes. The cold neutron source with total heat release in the in-pile constructions about 10 kW can reach the record brilliance compared to brilliance of other cold neutron sources in the world.

In modern reactor installations, there is a problem of structural material wear under the influence of neutron flux. At the National Research Centre “Kurchatov Institute”, based on the TIPr accelerator (Heavy-Ion Prototype), work is underway to study the radiation resistance of new materials using accelerated ion beams simulating neutron flux. As part of the improvement of experiments at the accelerator, it is planned to create a second channel for simultaneous irradiation of the sample with both heavy ions and hydrogen and helium ions, which will allow modeling the effects of transmutation of the sample in the area of damage by heavy ions. To focus a beam of hydrogen and helium ions, it is planned to use a system of quadrupole magnetic lenses powered by adjustable direct current sources.

The HEBT channel is designed for transportation of 4 MeV/u energy ion beams with Z/A = 1/4– 1/8 from linac to stripping target to prepare the beam for injection into the booster. The channel consists of magnetic quadrupole lenses providing transverse focusing of the beam and the debuncher to reduce the particles momentum spread to ±0.3%. Beam dynamic simulation was carried out taking into account three-dimensional distributions of the quadrupole lenses magnetic fields and electric fields of the debuncher.

The work is devoted to the development of a low energy beam transport (LEBT) system for a high current multicharged ions injector based on a superconducting ECR ion source. ECR ion source is under development at JINR as part of superheavy element research program The LEBT includes a beam analysis system. The paper describes results of ion beams dynamic simulation in the LEBT with “ideal” field approximation for optic elements.

Measurements of the transverse profile of the incident beam have a crucial importance for determining the optimal energy deposition of ions in irradiated material and experimental data interpretation in forthcoming FAIR (Facility for Antiproton and Ion Research) experiments on heating of material by intense heavy ion beams. The diagnostic method of transverse distribution of ion beam intensity on a target by detecting of X-ray radiation arising in the target under irradiation of incident ions is proposed. In this work, using the Geant4 numerical code, a full-scale model of the experiment was developed. Numerical simulation of the X-ray diagnostics of the ion beam was performed. Testing of the proposed method and comparison with the experimental results were made using Au+26 ion beam with energy 11.4 MeV/a.m.u. from the UNILAC accelerator at GSI (Germany) incident on 10 μm Cu target. The X-Ray image of the target was formed on a CsI scintillator by a pinhole camera and registered by a CMOS camera with an intensity amplifier.

The multifunctional research complex is presented, designed to obtain fundamental knowledge in the field of physics of discharge on the dielectric surface, in vacuum and gas gaps, to study the plasma properties of vacuum arcs in metal vapors and the properties of laser plasma using various techniques.

The process of propagation of an electromagnetic wave in a strongly magnetized (magnetic fields, exceeding G), charge-symmetric plasma is investigated. Taking into account the change in the dispersion properties of a photon in a magnetic field and plasma, it was found that, as well as the case of a pure magnetic field, the process of photon damping in a magnetized plasma has a nonexponential character. It is shown that the effective absorption width of a photon is significantly smaller in comparison with the results known in the literature.

Using proton–proton collision data, collected by the LHCb experiment and corresponding to the integrated luminosity of 9 fb−1, the several new decays to charmonium and three light charged hadrons are observed. In particular, following channels are observed B_c⁺→ ψ(2S)π⁺π⁻π⁺, B_c⁺→ (ψ(2S) → → J/ψπ⁺π⁻)π⁺, B_c⁺→ J/ψK⁺π⁻π⁺, and B_c⁺→ J/ψK⁺K⁻K⁺. The first evidence of the → ψ(2S)K⁺K⁻π⁺ decays is obtained. The branching fractions of these decays are measured with respect to the high-statistic normalization channels.

A series of applicators based on phased array antenna (PAA) has been created for electromagnetic high-frequency hyperthermia and simultaneous radiation therapy of tumors characterized by high transparency for gamma radiation. Studies have been carried out on the stability of the material of the main element of the microstrip emitter its antenna to the ionizing radiation. Possible seven sizes of applicator operating at a frequency of 434 MHz were considered. The distribution of the square of the component of the electrical part of the electromagnetic field emitted by the applicator – SAR (Specific Absorption Rate) in the plane of the applicator aperture was measured. Experimental results of SAR distribution in the plane of the applicator aperture from single modules for different phases of electromagnetic fields of excitation are presented. The main parameters of the Quality Standard in oncological hyperthermia, which should be achieved in the treatment of cancer patients with a specific list of nosological forms of neoplasms, are considered.