Simulation technologies in modern radiation material science

The results of simulation experiments on different materials are analyzed. Using irradiation with charged particle beams one can reproduce and examine practically all the known radiation effects and investigate physical nature of these effects in more details under well-controlled conditions. Characteristics of some radiation sources used for studies of radiation effects and radiation resistance and experimental procedures are presented. The accelerator systems, high-tech instrumentations and methodologies for the analysis of experimental data provide a comprehensive tool for determination of mechanisms of radiation damage and selection of materials with high radiation resistance.Проанализированы результаты имитационных экспериментов на различных материалах. Используя облучение пучками заряженных частиц, можно воспроизвести и исследовать практически все известные радиационные эффекты, а также изучить физическую природу этих эффектов более детально в хорошо контролируемых условиях. Представлены характеристики некоторых источников облучения, используемых для исследования радиационных эффектов, радиационной стойкости, и экспериментальные процедуры. Ускорительные системы, высокотехнологичные измерительные приборы и методики для анализа экспериментальных данных являются всеобъемлющим инструментом для определения механизмов повреждения и отбора материалов с высокой радиационной стойкостью.Проаналізовано результати імітаційних експериментів на різних матеріалах. Використовуючи опромінення пучками заряджених часток, можна відтворити та дослідити практично всі відомі радіаційні ефекти, а також вивчити фізичну природу цих ефектів більш детально в добре контрольованих умовах. Представленo характеристики деяких джерел опромінення, що використовуються для дослідження радіаційних ефектів, радіаційної стійкості, та експериментальні процедури. Прискорювальні системи, високотехнологічні вимірювальні прилади та методики для аналізу експериментальних даних є всеосяжним інструментом для визначення механізмів пошкодження та відбору матеріалів з високою радіаційною стійкістю

The Kharkov X-ray Generator Facility NESTOR

WEPWA060 - ISBN 978-3-95450-122-9International audienceThe last few years the sources of the X-rays NESTOR based on a storage ring with low beam energy and Compton scattering of intense laser beam are under design and development in NSC KIPT. The main task of the project is to develop compact intense X-ray generator on the base of relatively cheap accelerator equipment and up-to-date laser technologies. The paper is devoted to description of the last results on construction and commissioning of the facility

Homo- and Heteroligand Copper(II) Complexes with Some Aromatic Acid Hydrazides and L-Histidine

© 2020, Pleiades Publishing, Ltd. Abstract―: The composition and stability constants of homo- and heteroligand copper(II) complexes with benzoic acid, p-methoxybenzoic acid, or o-hydroxybenzoic acid hydrazide and L-histidine have been determined by spectrophotometry and mathematical modeling methods in aqueous solution with 0.1 M KNO3 as background at 25.0°C. Structural features of some complexes formed in binary and ternary systems have been determined using IR spectroscopy and quantum-chemical calculations

1,6-Bis(hydrazidomethylsulfinyl)hexane: the solution state and complexation with copper(II)

© 2020, Springer Science+Business Media LLC. The solution state of a new antituberculosis drug 1,6-bis(hydrazidomethylsulflnyl)hexane (L) and its complexation with copper(II) were investigated by spectrophotometry, pH-potentiometry (T = 25 °C; at variable ionic strength), and mathematical modeling. The dissociation constants of the protonated and imidol forms of compound L were determined. Complexation reactions in the Cu2+—L system result in mononuclear complexes [CuL]2+ and [CuL2]2+ with the amide form of the ligand provided that the redox reactions are excluded. The most probable (optimized) structures of 1,6-bis(hydrazidomethylsulfinyl)hexane and its complexes were obtained from quantum chemical calculations within the framework of the density functional theory (PBE/6-311G (d) method). Compound L adopts a folded conformation. The coordination site of the 1:1 complex includes six oxygen atoms from two carbonyl groups, two sulfoxide groups, and two water molecules. In the 1:2 complex, each ligand molecule is coordinated in bidentate mode through the carbonyl oxygen atom and the primary amino nitrogen of a hydrazide fragment

α,ω-Bis(Hydrazidomethylsulfinyl and Sulfonyl)Alkanes: State in solution and interaction with copper(II)

In this paper, the results of our previous findings on the solvent, protolytic, and complexing abilities of α,ω-bis(amido- and hydrazidomethylsulfinyl and sulfonyl)alkanes were summarized and compared. In addition, the most probable structures of copper(II) complexes (mononuclear 1:1 and 1:2, binuclear 2:4) with 1,8-bis(hydrazidomethylsulfonyl)octane and 1,10-bis(hydrazidomethylsulfonyl)decane were characterized by DFT at PBE/6-311G(d) level of theory. 1,8-Bis(hydrazidomethylsulfonyl)octane and 1,10-bis(hydrazidomethylsulfonyl)decane were found to have unfolded conformations and to be coordinated by copper(II) in the amide form like hydrazides of carboxylic acids. In the binuclear complex, all four ligands are bridging and differ in coordination ways, exhibiting the denticity of four, two, and three. It was demonstrated that sulfoxide groups do not take part in coordination

Complexes of 1,8-bis(hydrazidomethylsulfonyl)octane and 1,10-bis(hydrazidomethylsulfonyl)decane with copper(II)

© 2020 Kazan Federal University. All rights reserved. 1,8-bis(hydrazidomethylsulfonyl)octane and 1,10-bis(hydrazidomethylsulfonyl)decane differ by hydrocarbon spacer length, solubility in water, and polymerization tendencies. They and their amides are known to be new antitubercular agents. The substances act as polydentate ligands; in the pH range of 4.5–5.0 and with copper(II), they form cationic mono- and binuclear complexes. Preparatively isolated copper complexes with each of the two compounds have different compositions, which also differ from the composition of complexes in the solution

Experimental study of plasma-surface interaction and material damage relevant to ITER type i ELMs

The paper presents experimental investigations of main features of plasma-surface interaction and energy transfer to the material surface in dependence on plasma heat loads. The experiments were performed with QSPA repetitive plasma pulses of the duration of 0.25 ms and the energy density up to 2.5 MJ/m2 . Surface morphology of the targets exposed to QSPA plasma screams is analyzed. Relative contribution of the Lorentz force and plasma pressure gradient to the resulting surface profile is discussed. Development of cracking on the tungsten surface and swelling of the surface are found to be in strong dependence on initial temperature of the target

Tolok Vladimir Tarasovich: to 80th anniversary of birthday

Vladimir Tarasovich Tolok, the Corresponding Member of Ukrainian Academy of Sciences, Doctor of Sciences, Professor, Honored worker of the Ukrainian Science, is the well-known scientist in the field of plasma physics and controlled fusion, who has made a lot for coming-to-be and development of this direction in Ukraine