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Response of fusion plasma-facing materials to nanosecond pulses of extreme ultraviolet radiation
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SYSNO ASEP 0499585 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Response of fusion plasma-facing materials to nanosecond pulses of extreme ultraviolet radiation Author(s) Štraus, Jaroslav (UFP-V) RID
Koláček, Karel (UFP-V) RID
Schmidt, Jiří (UFP-V) RID
Frolov, Oleksandr (UFP-V) RID
Vilémová, Monika (UFP-V) RID, ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Jäger, A. (CZ)
Juha, Libor (UFP-V) ORCID
Toufarová, M. (CZ)
Choukorov, A. (CZ)
Kasuya, K. (JP)Number of authors 11 Source Title Laser and Particle Beams. - : Cambridge University Press - ISSN 0263-0346
Roč. 36, č. 3 (2018), s. 293-307Number of pages 15 s. Language eng - English Country US - United States Keywords Interaction of XUV with matter ; plasma-facing materials ; XUV radiation resistance Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA14-29772S GA ČR - Czech Science Foundation (CSF) GA14-12837S GA ČR - Czech Science Foundation (CSF) LG15013 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015087 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTT17015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFP-V - RVO:61389021 UT WOS 000451709500003 EID SCOPUS 85052968955 DOI 10.1017/S0263034618000332 Annotation The experimental study of damage to tungsten (W), molybdenum (Mo), and silicon carbide (SiC) surfaces induced by focused extreme ultraviolet laser radiation (lambda similar to 47 nm/similar to 1.5 ns/21-40 mu J) is presented. It was found that W and Mo behaved similarly: during the first shot, the damaged area is covered by melted and re-solidified material, in which circular holes appear residua of just opened pores/bubbles, from which pressurized gas/vapors escaped. Next cracks and ruptures appear and the W has a tendency to delaminate its surface layer. Contrary, single-crystalline SiC has negligible porosity and sublimates, therefore, no escape of 'pressurized' gas and no accompanying effects take place. Moreover, SiC at sublimating temperature decomposes to elements, therefore, the smooth crater morphology can be related to local laser energy density above ablation threshold. When more shots are accumulated, in all three investigated materials, the crater depth increases non-linearly with number of these shots. The surface morphology was investigated by an atomic force microscope, the surface structure was imaged by a scanning electron microscope (SEM), and the structure below the surface was visualized by SEM directed into a trench that is milled by focused ion beam. Additionally, structural changes in SiC were revealed by Raman spectroscopy. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2019 Electronic address https://www.cambridge.org/core/services/aop-cambridge-core/content/view/94EC0B3668AFF31234394BA12636C21C/S0263034618000332a.pdf/response_of_fusion_plasmafacing_materials_to_nanosecond_pulses_of_extreme_ultraviolet_radiation.pdf
Number of the records: 1