A5082716783- Fusion materials and technologies
- Magnetic confinement fusion research
- Laser-induced spectroscopy and plasma
- Ion-surface interactions and analysis
- Analytical chemistry methods development
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Advanced Sensor Technologies Research
- Ionosphere and magnetosphere dynamics
- Laser Design and Applications
- Sensor Technology and Measurement Systems
- X-ray Spectroscopy and Fluorescence Analysis
- Mercury impact and mitigation studies
- Spectroscopy and Laser Applications
- Advanced Materials Characterization Techniques
- Advanced MEMS and NEMS Technologies
Institute of Plasma Physics and Laser Microfusion
2018-2024
Warsaw University of Technology
2018
Abstract Laser-induced breakdown spectroscopy (LIBS) is one of the most promising methods for quantitative in-situ determination fuel retention in plasma-facing components (PFCs) magnetically confined fusion devices like ITER and JET. In this article, current state understanding LIBS development applications will be presented, based on a complete review existing results complemented with newly obtained data. The work has been performed as part research programme, set up EUROfusion...
Abstract The JET hybrid scenario has been developed from low plasma current carbon wall discharges to the record-breaking Deuterium-Tritium plasmas obtained in 2021 with ITER-like Be/W wall. development started pure Deuterium refinement of current, and toroidal magnetic field choices succeeded solving heat load challenges arising 37 MW injected power ITER like environment, keeping radiation edge core controlled, avoiding MHD instabilities reaching high neutron rates. have re-run Tritium...
Abstract We present an overview of results from a series L–H transition experiments undertaken at JET since the installation ITER-like-wall (JET-ILW), with beryllium wall tiles and tungsten divertor. Tritium, helium deuterium plasmas have been investigated. Initial in tritium show ohmic transitions low density power threshold for ( P LH ) is lower than ones densities, while we still lack contrasted data to provide scaling high densities. In there notable shift which minimum <?CDATA...
Abstract The recent deuterium–tritium campaign in JET-ILW (DTE2) has provided a unique opportunity to study the isotope dependence of L-H power threshold an ITER-like wall environment (Be and W divertor). Here we present results from dedicated transition experiments at JET-ILW, documenting tritium plasmas, comparing them with matching deuterium hydrogen datasets. From earlier it is known that as plasma isotopic composition changes deuterium, through varying deuterium/hydrogen concentrations,...
Abstract The dimensionless isotope mass scaling experiment between pure Deuterium and Tritium plasmas with matched <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msup> <mml:mi>ρ</mml:mi> <mml:mo>∗</mml:mo> </mml:msup> </mml:math> , <mml:mi>ν</mml:mi> β n q <mml:msub> <mml:mi>T</mml:mi> <mml:mi>e</mml:mi> </mml:msub> <mml:mrow> <mml:mo>/</mml:mo> </mml:mrow> <mml:mi>i</mml:mi> has been achieved in JET L-mode dominant electron heating (NBI+ohmic) conditions....
Laser Induced Breakdown Spectroscopy (LIBS) method is considered to be a promising tool for analyzing the retention of hydrogen isotopes (D and T) helium (He) on first walls divertor regions future fusion reactors. Helium will produced in DT reactions but could also used initial non-nuclear phases DEMO concepts. The present study investigates He detection by LIBS Be coatings simulating deposits plasma-facing components JET while results are relevant other wall materials. was carried out...
Abstract The experimental and theoretical analysis were focused on experiments conducted to assess the effect of plasma isotopes, protium (H), deuterium (D), tritium (T) ion cyclotron resonance heating (ICRH) related wall interactions. Comparison L-mode discharges with N = 1 3 He H minority ICRH scenarios done for different isotopes. For selected pulses, behaviour high-Z, mid-Z low-Z intrinsic impurity radiated power was investigated based data from VUV, visible spectroscopy, bolometry...
Understanding the interaction between fusion plasma and plasma-facing materials (PFMs) is crucial for achieving optimal performance, safety, lifetime of devices. Relevant have been intensely studied to determine fuel retention composition co-deposited layers on PFMs by depth profile analysis using Laser-Induced Breakdown Spectroscopy (LIBS) Calibration-Free (CF)-LIBS. However, comparison containing a mixture different (seeding) gases LIBS, has not systematically. Consequently, aim this work...
Controlling plasma fuel retained in the facing components of first wall a fusion reactor is one most important challenges influencing safe operation International Thermonuclear Experimental Reactor place. This issue proposed to be addressed by laser-induced breakdown spectroscopy (LIBS) diagnostics, which particularly powerful studying near-surface deposits and analyzing their composition. The main goal present study determining depth profiles different elements beryllium-based materials...
Retention of hydrogen isotopes in thermonuclear reactors is a safety and maintenance issue, thus requires contactless measurement method its level. Although calibration free LIBS proved usefulness on calibrated samples even tokamaks, performance may be deteriorated next-step fusion devices because sensitivity the plasma parameters as electron temperature density which are more challenging to precisely measured than laboratory conditions. Moreover, both Beryllium Tungsten have spectral lines...
Tunable diode laser absorption spectroscopy (TDLAS) is a commonly used technique to measure the temperature and density of atoms or molecules in gas. In this work, we demonstrate that TDLAS diagnostics could be effectively applied magnetic field low-density weakly magnetized plasma using Zeeman splitting spectrum lines from noble gases. The wavelength tailored fit 1 s 5 → 2 p 6 transition atomic Ar with λ = 763.51 nm . Two mechanisms line broadening are observed: Doppler effect. latter...
Experimental campaigns at the Joint European Torus with an ITER-like Be/W wall pure deuterium (D), tritium (T), and deuterium–tritium (DT) were a unique opportunity to explore various aspects related ITER operation. One of most important challenges in recent years was development hybrid scenario for D-T, based on reference plasmas. This kind scenario, one foreseen ITER, is characterized by low current plasma high normalized beta βN factor compared parallel optimized baseline [Hobirk et al.,...
The work presents the recent outcome of research on Joint European Torus with ITER-like wall (JET-ILW) concerning Be, mid-Z (Ni, Cu, Fe), and high-Z (W) impurities for a selection Neutral Beam Injection-heated, ELMy H-mode pulses using visible vacuum–ultraviolet spectroscopy together bolometry diagnostic. investigation is focused evaluation plasma triangularity (δ) impact impurity radiation in hydrogen (H), deuterium (D), tritium (T), deuterium–tritium (DT) plasmas described [P. A....
Abstract The behaviour of impurities in fusion plasmas is crucial importance for achieving sustained reactions, and understanding similarities differences between Deuterium (D) Tritium (T) needed to assess potential changes from DD DT ITER future reactors. first dimensionless dimensional isotope identity experiments L-mode were conducted at the JET W/Be wall. In approach, discharges with matched ρ ∗, ν β n , q T e / i compared emphasize direct effects, while approach engineering parameters...
The spectroscopic results are commonly expressed in counts unit; however, these calculated by inner hardware/software procedures and cannot be regarded as a number of events photon emission or even their interaction with detectors. depends on many factors the camera spectral sensitivity transmittances all optical components between plasma under observation detector. On other hand, quantitative analysis emitted photons is an inevitable step development calibration-free LIBS method, therefore,...
Abstract The information about time evolution of plasma electron temperature and density plays a fundamental role in numerous physics-related sciences. For CF DP-LIBS (calibration-free double-pulse laser-induced breakdown spectroscopy), not only may it serve to minimize the impact on investigated sample, but also optimize laser spectral parameters, or even pave way for real-time chemical analysis sample. To evaluate this describe behavior, are calculated induced by Nd:YAG with various (0–500...