A5014870114- Fusion materials and technologies
- Nuclear Materials and Properties
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Nuclear reactor physics and engineering
- Plasma Diagnostics and Applications
- Thermal properties of materials
- Advanced Chemical Physics Studies
- Vacuum and Plasma Arcs
- Advanced Materials Characterization Techniques
- Nuclear Physics and Applications
- Minerals Flotation and Separation Techniques
- Magnetic confinement fusion research
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced materials and composites
- Metallurgical and Alloy Processes
- Superconducting Materials and Applications
- High-pressure geophysics and materials
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2024
Moscow Engineering Physics Institute
2020-2024
Kurchatov Institute
2021
FESTIM (Finite Element Simulation of Tritium In Materials), is a versatile open-source finite element code developed in Python for simulating hydrogen transport materials. addresses limitations observed existing codes by enabling multi-dimensional, multi-material simulations, leveraging the flexible method and FEniCS library. Use cases illustrating FESTIM's applicability efficacy are presented: reproduction thermo-desorption experiments, modelling plasma-facing components (divertor...
Retention of hydrogen isotopes (HI) in plasma-facing components (PFCs) is a crucial process influencing the operation fusion device. The dynamics HI retention mainly determined by irradiation conditions PFCs. These can change due to onset fast transient events, such as edge-localised modes (ELMs). development ELMs results repetitive short-term plasma bursts on PFCs, affecting exposure regime. In this work, effect ELM-like loads fuel numerically analysed using one-dimensional diffusion model,...
Explosive electron emission splashes occurring in plasma interactions with nanostructured surfaces can be induced by Joule energy release under reduced conductivity. Distribution of helium nanobubbles inside tungsten at an elevated implanted ions has been studied via numerical molecular dynamic modeling, and its impact on the nanostructure conductivity estimated. Average concentration size were calculated to about n = 1020 cm−3 r 3 Å, respectively, fluence 2 × 1015 cm−2. The distribution...
The open-source code FESTIM (Finite Element Simulation of Tritium In Materials) is a powerful user-friendly software for hydrogen transport simulations. Up to now, it was capable addressing various problems with surface processes dependent on the concentration solute species. However, kinetics should be considered under certain conditions. recent 1.3 release introduced new kinetic model, implemented in flexible way applications. correctness implementation first proven using method...
Small spherical tokamak MEPHIST is under construction at the NRNU MEPhI.This paper devoted to analysis of working area and modeling ohmic discharges in different plasma configurations, which can be obtained it.
The helium plasma properties and confinement remain an important area of research in modern fusion devices.This work is dedicated to the initiation control a small-scale tokamak GOLEM compared hydrogen plasma.Helium plasmas are comprehensively optimum operational conditions for start-up found.Long-range correlations between lowfrequency (<50 kHz) electrostatic magnetic oscillations found, as well broadband (<250 resolved frequency wave vector plasma.
Monitoring of the DT-fuel retention in plasma-facing components (PFCs) is vital for long-term operations future fusion devices. Laser-induced desorption (LID) a proposed technique systematic in-situ control hydrogen isotope content surface layers PFCs. An accurate interpretation LID measurements requires information on composition released particles. Under some conditions, both atoms and molecules can be desorbed. The present study aims to verify role atomic release under nanosecond...
Field emission current accompanied by visualization of sites distribution was measured for nanostructured tendril bundles (NTB) on a tungsten surface. These structures are formed in linear simulators plasma-surface interaction under helium plasma irradiation with Ne or N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> mixture, and unipolar arcing is often observed such surfaces. It shown that field from NTB could be stable long period...