Abstract
Controlling plasma fuel retained in the plasma facing components of the first wall of a fusion reactor is one of the most important challenges influencing safe operation of the International Thermonuclear Experimental Reactor in the first place. This issue is proposed to be addressed by the laser-induced breakdown spectroscopy (LIBS) diagnostics, which is particularly powerful in studying the near-surface deposits and analyzing their composition. The main goal of the present study is determining the depth profiles of different elements in beryllium-based materials and the possible co-deposited layers that are formed on the walls of the Joint European Torus (JET) fusion device. Depth profiles estimated by LIBS are compared with those measured by secondary ion mass spectrometry, furthermore, the differences are discussed. In particular, the evolution of spectral lines of Be, as well as the main gaseous elements, such as Ne, N, O, and D, incorporated into the samples were extracted at different depths in the layers. LIBS diagnostics allowed making a fairly accurate analysis of the detected spectral lines of the elements on the samples. The effect of variations of the ablation rate and uncertainty that it introduces in LIBS measurements was also discussed. This investigation will have a significant impact on the development of pre-processing algorithms for machine learning models in terms of adaptation models operating on synthetic data for processing experimental spectra and is important from a point of view of LIBS tests being under preparation at JET.
| Original language | English |
|---|---|
| Article number | 063501 |
| Number of pages | 6 |
| Journal | Physics of Plasmas |
| Volume | 31 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jun 2024 |
| MoE publication type | A4 Article in a conference publication |
| Event | International Conference on Research and Applications of Plasmas, PLASMA 2023 - Warsaw, Poland Duration: 18 Sept 2023 → 20 Sept 2023 |
Funding
This scientific paper has been published as part of an international project co-financed by the Polish Ministry of Science and Higher Education within the program called \u201CPMW\u201D for 2023. The authors A.M.R., P.G.B., and P.V. acknowledge the Scientific Grant Agency of the Slovak Republic (Contract No. 1/0803/21) and the Slovak Research and Development Agency (APVV-22-0548) for financial support. This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200\u2014EUROfusion). Views and opinions expressed are, however, those of the authors only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.
