Improved ERO modelling for spectroscopy of physically and chemically assisted eroded beryllium from the JET-ILW

Physical and chemical assisted physical sputtering were characterised by the Be I and Be II line and BeD band emission in the observation chord measuring the sightline integrated emission in front of the inner beryllium limiter at the torus midplane. The 3D local transport and plasma-surface interaction Monte- Carlo modelling (ERO code [18] ) is a key for the interpretation of the observations in the vicinity of the shaped solid Be limiter. The plasma parameter variation (density scan) in limiter regime has provided a useful material for the simulation benchmark. The improved background plasma parameters input, the new analytical expression for particle tracking in the sheath region and implementation of the BeD re- lease into ERO has helped to clarify some deviations between modelling and experiments encountered in the previous studies [4,5] . Reproducing the observations provides additional confidence in our ‘ERO-min’ fit for the physical sputtering yields for the plasma-wetted areas based on simulated data.EURATOM 63305

Progress in reducing ICRF-specific impurity release in ASDEX upgrade and JET

Use of new 3-strap ICRF antennas with all-tungsten (W) limiters in ASDEX Upgrade results in a reduction of the W sources at the antenna limiters and of the W content in the confined plasma by at least a factor of 2 compared to the W-limiter 2-strap antennas used in the past. The reduction is observed with a broad range of plasma shapes. In multiple locations of antenna frame, the limiter W source has a minimum when RF image currents are decreased by cancellation of the RF current contributions of the central and the outer straps. In JET with ITER-like wall, ITER-like antenna produces about 20% less of main chamber radiation and of W content compared to the old A2 antennas. However the effect of the A2 antennas on W content is scattered depending on which antennas are powered. Experiments in JET with trace nitrogen (N 2 ) injection show that a presence of active ICRF antenna close to the midplane injection valve has little effect on the core N content, both in dipole and in -90 °phasing. This indicates that the effect of ICRF on impurity transport across the scape-off-layer is small in JET compared to the dominant effect on impurity sources leading to increased impurity levels during ICRF operation.EURATOM 633053US Department of Energy DE-AC05-00OR2272

An analytical expression for ion velocities at the wall including the sheath electric field and surface biasing for erosion modeling at JET ILW

For simulation of plasma-facing component erosion in fusion experiments, an analytical expression for the ion velocity just before the surface impact including the local electric field and an optional surface biasing effect is suggested. Energy and angular impact distributions and the resulting effective sputtering yields were produced for several experimental scenarios at JET ILW mostly involving PFCs exposed to an oblique magnetic field. The analytic solution has been applied as an improvement to earlier ERO mod- elling of localized, Be outer limiter, RF-enhanced erosion, modulated by toggling of a remote, however magnetically connected ICRH antenna. The effective W sputtering yields due to D and Be ion impact in Type-I and Type-III ELMs and inter-ELM conditions were also estimated using the analytical approach and benchmarked by spectroscopy. The intra-ELM W sputtering flux increases almost 10 times in comparison to the inter-ELM flux.EURATOM 63305

Experimental estimation of tungsten impurity sputtering due to Type I ELMs in JET-ITER-like wall using pedestal electron cyclotron emission and target Langmuir probe measurements

The ITER baseline scenario, with 500 MW of DT fusion power and Q = 10, will rely on a Type I ELMy H-mode and will be achieved with a tungsten (W) divertor. W atoms sputtered from divertor targets during mitigated ELMs are expected to be the dominant source in ITER. W impurity concentration in the plasma core can dramatically degrade its performance and lead to potentially damaging disruptions. Understanding the physics of the target W source due to sputtering during ELMs and inter-ELMs is important and can be helped by experimental measurements with improved precision. It has been established that the ELMy target ion impact energy has a simple linear dependence with the pedestal electron temperature measured by Electron Cyclotron Emission (ECE). It has also been shown that Langmuir Probes (LP) ion flux measurements are reliable during ELMs due to the surprisingly low electron temperature. Therefore, in this paper, LP and ECE measurements in JET-ITER-Like-Wall (ILW) unseeded Type I ELMy H-mode experiments have been used to estimate the W sputtering flux from divertor targets in ELM and inter-ELM conditions. Comparison with similar estimates using W I spectroscopy measurements shows a reasonable agreement for the ELM and inter-ELM W source. The main advantage of the method involving LP measurements is the very high time resolution of the diagnostic (∼10 μs) allowing very precise description of the W sputtering source during ELMs.EURATOM 633053MSMT INGO LG14002Fundação para a Ciência e Tecnologia UID/FIS/50010/201

Contradictions in the Development of the Welfare Non-Profit Sector in Russia

Received 28 April 2023. Accepted 8 August 2023. Published online 6 October 2023.The article focuses on the core contradictions within the development of the social non-profit sector in Russia. The empirical basis of the study comprises statistical data, legal documents regulating the social services’ sphere, research data from previous studies conducted in Russia, as well as qualitative data collected for this study. The introduction provides background information on the stages of reforming the social service system in Russia. The first part is devoted to the contradictions between international trends and Russian patterns. In line with a neoliberal approach, non-profit NGOs play a significant role as key actors in social work providing social services for different client groups. At the same time, they are not independent and Russian civil society is not yet strong enough to realize social rights of citizens. In the next section, some of the key issues of interaction between the government and NGOs are discussed. An analysis of the current situation demonstrates that while a social partnership between the state and NGOs is affirmed by authorities on official level, in practice, the state still dominates the social sector. The article then focuses on how Russian NGOs have reoriented their efforts toward financial sustainability through government support.This work was supported by the Russian Science Foundation (RSF) under the project No. 19–18–00246-P, titled “Challenges of the transformation of welfare state in Russia: institutional changes, social investment, digitalization of social services”, implemented at St. Petersburg State University

Social investment: Problems and development strategies

We present the findings of a survey aimed at identifying expert opinions about social investment policies. Our sample includes respondents from Russian regions (n = 160) involved in the production of social services – specialists and heads of state social institutions, non-profit organizations, social entrepreneurs, and authorities. Research findings suggest key factors that might contribute to the development of non-profit sector of social services and social entrepreneurship. The state and local governments are considered by experts as the main investors, while financial investments in the form of budget subsidies and grants are the most anticipated forms for solving regional social issues. Investing in infrastructure and personnel is among the most popular areas for social investment related to the development of new suppliers. According to the respondents, the priority spheres for social entrepreneurship are investments to children, youth, health, and active longevity. The survey participants view social investment as a strategy for the social development of regions based on the achievement of social goals combined with economic results. The professional community considers the lack of interest in the new type of entrepreneurship among residents of the regions, including private investors, and the weak interest of local governments as risks for social investment policy and social entrepreneurship © 2022. Terra Economicus.All Rights Reserved.Russian Science Foundation, RSF: 19-18-00246Funding: The research is prepared with the financial support of the Russian Science Foundation, project № 19-18-00246 “Challenges of transformation of the welfare state in Russia: Institutional changes, social investment, digitalization of social services”, implemented at St. Petersburg State University

The effect of beryllium oxide on retention in JET ITER-like wall tiles

Preliminary results investigating the microstructure, bonding and effect of beryllium oxide formation on retention in the JET ITER-like wall beryllium tiles, are presented. The tiles have been investigated by several techniques: Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-ray (EDX), Transmission Electron microscopy (TEM) equipped with EDX and Electron Energy Loss Spectroscopy (EELS), Raman Spectroscopy and Thermal Desorption Spectroscopy (TDS). This paper focuses on results from melted materials of the dump plate tiles in JET. From our results and the literature, it is concluded, beryllium can form micron deep oxide islands contrary to the nanometric oxides predicted under vacuum conditions. The deepest oxides analyzed were up to 2-micron thicknesses. The beryllium Deuteroxide (BeOxDy) bond was found with Raman Spectroscopy. Application of EELS confirmed the oxide presence and stoichiometry. Literature suggests these oxides form at temperatures greater than 700 °C where self-diffusion of beryllium ions through the surface oxide layer can occur. Further oxidation is made possible between oxygen plasma impurities and the beryllium ions now present at the wall surface. Under Ultra High Vacuum (UHV) nanometric Beryllium oxide layers are formed and passivate at room temperature. After continual cyclic heating (to the point of melt formation) in the presence of oxygen impurities from the plasma, oxide growth to the levels seen experimentally (approximately two microns) is proposed. This retention mechanism is not considered to contribute dramatically to overall retention in JET, due to low levels of melt formation. However, this mechanism, thought the result of operation environment and melt formation, could be of wider concern to ITER, dependent on wall temperatures.EUROfusion 63305

Results of a survey of parents about the organization of medical rehabilitation for children with the consequences of perinatal diseases.

The aim of the work was to identify parents' attitudes toward the organization of multilevel medical rehabilitation of children with the consequences of perinatal diseases.Цель работы – выявить отношение родителей к организации многоуровневой медицинской реабилитации детей с последствиями заболеваний перинатального периода

CYTOKINE PROFILE IN VISCERAL OBESITY AND ADVERSE CARDIOVASCULAR PROGNOSIS OF MYOCARDIAL INFARCTION

Presence of myocardial infarction in patients with obesity can lead to an uncontrolled increase in proinflammatory cytokines and unfavorable course of the pathological process. Objective: to study the relationship of key inflammatory factors and the development of complications at different terms after myocardial infarction in patients with visceral obesity. The study involved 94 men with myocardial infarction. Visceral obesity was diagnosed by multi-slice computed tomography (LightspeedVCT 64 ,General Electric,USA). On the 1st and 12th day of hospitalization, we determined serum concentrations of interleukins (TNFα, IL-1β, IL-6, IL-8 IL-10 and IL-12), and C-reactive protein. Adverse cardiovascular events were documented during the next year. The most informative indicators were identified by a stepwise logistic regression analysis. In patients with myocardial infarction an imbalance of cytokine profile revealed, i.e., an increase in proinflammatory markers (TNFα, IL-1β, IL-6, IL-8, IL-12, CRP), along with decrease in IL-10, being more pronounced in cases of visceral obesity. Among the studied markers, closest relationship was observed between visceral obesity and serum concentrations of IL-6 and CRP. Over the year, adverse cardiovascular events proved to be more frequent in patients with visceral obesity. Post-infarction complication risk was associated with higher concentrations of IL-6, IL-12 and IL-10 deficiency. Hence, development of adverse cardiovascular events within a year after myocardial infarction is more typical to the patients with visceral obesity, and is accompanied by activation of proinflammatory cytokines and IL-10 deficiency