A5071874728- Magnetic confinement fusion research
- Fusion materials and technologies
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Graphite, nuclear technology, radiation studies
- Laser Design and Applications
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Diamond and Carbon-based Materials Research
- Ionosphere and magnetosphere dynamics
- Plasma Diagnostics and Applications
- Calibration and Measurement Techniques
- Ion-surface interactions and analysis
- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Gyrotron and Vacuum Electronics Research
- Laser-induced spectroscopy and plasma
- Cold Fusion and Nuclear Reactions
- Plasma Applications and Diagnostics
Kurchatov Institute
2014-2024
Institute for Physics and Power Engineering
2024
Troitsk Institute for Innovation and Fusion Research
2000-2018
State Research Center of the Russian Federation
2004-2018
Ioffe Institute
2018
Institute for High Energy Physics
2012
Abstract The JET 2019–2020 scientific and technological programme exploited the results of years concerted engineering work, including ITER-like wall (ILW: Be W divertor) installed in 2010, improved diagnostic capabilities now fully available, a major neutral beam injection upgrade providing record power 2019–2020, tested technical procedural preparation for safe operation with tritium. Research along three complementary axes yielded wealth new results. Firstly, plasma delivered scenarios...
This paper presents a review of the last T-11M and T-10 tokamak activity in field Li plasma facing component (PFC) investigation. Attention is mainly paid to realization concept closed loop lithium circulation as solution PFC problem steady-state DT volumetric neutron source on basis. Realization demands decision three main tasks: injection into plasma, collection before its deposition vacuum vessel return zone from collector. emitter–collector assumes that heat flux hot (limiters divertor...
Abstract The Monte-Carlo code ERO2.0 was used to simulate steady-state erosion and transport of beryllium (Be) in the ITER main chamber. Various plasma scenarios were tested, including a variation species (hydrogen, deuterium, helium), conditions (density, temperature, flow velocity) magnetic configurations. study provides valuable predictions for Be divertor, where it is expected be an important contributor dust formation fuel retention due build-up co-deposited layers. gross net rates...
Since ITER will be a full metallic wall machine, scattered photons from the strong emission in divertor may distort scrape-off layer (SOL). The influence of stray light for visible spectroscopy Hα and Be I emissions was investigated with ray-tracing simulation. It found that would always more than one order magnitude greater real signal intensity SOL. For emission, although situation better cases measurement, could much larger In ITER, it inevitably reduce somehow spectroscopy. effect...
The use of an all-metal first wall in future magnetic fusion reactors equipped with a divertor may impose severe limitations on the capabilities optical diagnostics main chamber because stray light (DSL) produced by reflections intense emitted divertor. Here, we introduce synthetic H-alpha to estimate errors solutions inverse problems aimed at recovering neutral hydrogen parameters (density and isotope ratio) scrape-off layer (SOL) allowance for (a) strong DSL observation chords chamber, (b)...
Abstract ERO2.0 is a recently developed Monte‐Carlo code for modelling global erosion and redeposition in fusion devices. We report here on the code's application to ITER studying of beryllium (Be) first wall armour under burning plasma steady state diverted conditions. An important goal study provide synthetic signals design two key diagnostics: main chamber visible spectroscopy laser in‐vessel viewing systems. The simulations are performed using toroidally symmetric backgrounds obtained by...
Abstract The theoretical model suggested for ITER main chamber H α spectroscopy is applied to the high-resolution (HRS) data of recent JET ITER-like wall (ILW) experiments. aimed at reconstructing neutral hydrogen isotope density in SOL, as well ratio, by solving a multi-parametric inverse problem with allowance (i) strong divertor stray light (DSL) on main-chamber lines sight (LoS), (ii) substantial deviation atom velocity distribution function (VDF) from Maxwellian and (iii) direct...
Abstract A tomographic method for reconstructing the axially symmetric D α emission profile in ITER scrape-off layer and divertor from intensity measurements fields of view (FoV) Vis/IR TV Divertor Impurity Monitor diagnostics is under development. The takes into account strong background signal due to stray light produced by reflections metal wall vacuum chamber. allows filter out signals measured main accuracy this tested within framework a synthetic diagnostic, which uses Raysect Cherab...
Due to the development of ITER project, requirements technical parameters systems were more precisely and practically determined be at higher levels. The essential increase system characteristics happened recently. A number prototypes manufactured tests carried out. results manufacture 25 systems, subject Russian Federation's obligations in are described.
Abstract A new method for estimating the global erosion of beryllium (Be) in ITER is proposed. The uses raytracing-aided tomography to reconstruct three-dimensional (3D) profile visible-light emissivity boundary plasma from images captured with filtered cameras VIS/IR wide angle viewing system, H-alpha (and Visible) Spectroscopy diagnostics and signals collected Divertor Impurity Monitor. light reflected into detectors metallic plasma-facing components (PFCs) out process. reconstructed Be...
The present study addresses the uncertainties that affect recently performed predictions of beryllium (Be) erosion and migration in ITER using Monte-Carlo code ERO2.0. focus is a D–T baseline discharge with fusion power gain Q=10, scrape-off layer (SOL) input PSOL=100MW, toroidal plasma current Ip=15MA, central field Bt=5.3T. parameter studies used to investigate include variations radial extrapolation parameters far-SOL (scan A), assumptions on impact angle distributions B) anomalous...
The reflection of light from walls will result in parasitic signals for various optical diagnostics and can be a serious issue ITER. In this study, we show recent progress the assessment effects wall reflections ITER based on ray tracing simulation results. Four different were chosen simulation, i.e. visible spectroscopy, infrared thermography, edge laser Thomson scattering, charge exchange recombination spectroscopy.
A diagnostic system for plasma radiated power tomography on Globus-M was upgraded with a new linear array based silicon photodiodes. The hardware of the 256-channel tangential matrix and 24-channel is described. algorithm 2D tomographic reconstruction emissivity presented. It uses Tikhonov regularization method anisotropic diffusion functional as side constraint. Simulated profiles were used to test assess capabilities developed algorithm. Data analysis carried out in ohmic neutral beam...
Energetic tail formation by ion-cyclotron-range-of-frequencies (ICRF) heating was studied in the large helical device (LHD), measuring high-energy charge-exchange atom spectra with a specially developed natural diamond detector, which views LHD plasma perpendicularly. Comparison of measured effective perpendicular temperature ICRF-driven H+ minority ions classical Stix model indicates that energy at least up to 150 keV are well confined centre region LHD. However, deviation from prediction...
A parameterization of the Balmer-alpha spectral line shape asymmetry in tokamak scrape-off layer (SOL) plasmas is suggested, which describes contribution nonMaxwellian components neutral atom velocity distribution function. Parameterization needed for a fast-routine interpretation high-resolution spectroscopy data and should be incorporated into algorithms recovery hydrogen parameters SOL. We illustrate efficiency on example calculated using predictive modeling International Thermonuclear...
We report on the first results for spectrum of divertor stray light (DSL) and signal-to-background ratio D-α emitted from far SOL in JET recent ITER-like wall (ILW) campaign. The support expectation a strong impact DSL upon H-alpha (and Visible Light) Spectroscopy Diagnostic ITER.