A5028554175- Magnetic confinement fusion research
- Fusion materials and technologies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Metal and Thin Film Mechanics
- High-pressure geophysics and materials
- Laser-Plasma Interactions and Diagnostics
- Seismic Imaging and Inversion Techniques
- Geophysical and Geoelectrical Methods
- Particle accelerators and beam dynamics
- Advanced Chemical Physics Studies
Institute of Nuclear Physics, Polish Academy of Sciences
2022-2024
The disruption and runaway electron analysis model code was extended to include tungsten impurities in simulations with the aim of studying (RE) generation. This study investigates RE current sensitivity on following plasma parameters modelling choices: concentration, magnetic perturbation strength, modelling, thermal quench time tokamak geometry: ITER-like or ASDEX-like. Our investigation shows that a concentration below 10-3 does not cause significant generation its own. However, at higher...
In fusion plasmas, essential plasma parameters can be inferred from x-ray and neutron measurements. The analysis of emitted spectra give access to the fuel ion ratio temperature, while local emissivity contains information about electron magnetic axis, concentration impurities that estimated with help dedicated tomographic inversion synthetic diagnostic tools. We report on ongoing efforts diagnostics tokamak plasmas. A methodology determine core impurity temperature multiple line-integrated...
Abstract X-ray tomography is a precious tool in tokamaks that provides rich information about the core plasma, such as local impurity concentration, electron temperature and density well magnetic equilibrium (ME) magnetohydrodynamic activity. Nevertheless, inferring plasma emissivity from sparse set of line-integrated measurements an ill-posed problem requires dedicated regularization validation methods. Besides, speeding up inversion algorithm order to be compatible with real-time control...
With the choice of tungsten as a material for ITER plasma facing components, suprathermal electron interaction with non-fully ionized impurities emerged an important issue in modeling. Microwave heating and current drive systems, especially lower hybrid drive, can generate significant population electrons plasma. Also, case runaway generation mitigation by massive gas injection, collisions have impact on drag force. A correct description fast requires calculation atomic form factor. This be...
Abstract Most realistic kinetic calculations for tokamak plasmas are now required to incorporate the effect of partially ionized high-Z elements arising either from uncontrolled influxes metallic impurities, such as tungsten in high input power regimes or mitigation runaway electrons generated after possible major disruptions by massive gas injection. The usual electron–ion Fokker–Planck collision operator must therefore be modified, because all plasma atoms not entirely ionized, is case...
Since the year 2019, project entitled „Study of mutual dependence between Lower Hybrid current drive and heavy impurity transport in tokamak plasmas ”has been jointly executed by Polish (IFJ PAN) French (CEA-IRFM) research teams. A particularly crucial topic studied within this is influence not fully ionized high- Z impurities (e.g. tungsten ions) on suprathermal electrons dynamics. The can be using a Fokker-Planck solver. However, case, it necessary to modify electron-ion collision...