Investigation of Tin removal for liquid metal Tokamak divertor by low pressure argon arc with hot tungsten cathode system

0579480 - FZÚ 2024 RIV DE eng J - Journal Article
Mishra, H. - Mašek, T. - Turek, Z. - Čada, Martin - Hubička, Zdeněk - Kudrna, P. - Tichý, M.
Investigation of Tin removal for liquid metal Tokamak divertor by low pressure argon arc with hot tungsten cathode system.
Journal of Fusion Energy. Roč. 42, č. 2 (2023), č. článku 36. ISSN 0164-0313. E-ISSN 1572-9591
Institutional support: RVO:68378271
Keywords : Tin * Argon arc * hot cathode * optical emission spectroscopy * Langmuir probe * scanning electron microscope
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1007/s10894-023-00374-8

The influence of a low-pressure argon arc with a hot tungsten cathode on the thin tin film with a negative bias voltage applied during the plasma treatment was investigated to study the tin film removal from the sample surface. Samples were prepared on a stainless-steel substrate using magnetron sputtering and hybrid HiPIMS assisted with electron cyclotron wave resonance. During treatment optical emission spectroscopy was employed to detect and characterize the emission line of tin spectrum and the electron density and temperature were measured by Langmuir probe. Morphological study by a scanning electron microscope helped gain insight into the mechanism of tin removal from the substrate. In addition, elemental compositions of tin layer before and after treatment was measured by energy-dispersive X-ray spectroscopy. We believe that this study contributes to finding a proper treatment for tin removal from plasma-facing surfaces of tokamaks using tin in the liquid metal divertor.
Permanent Link: https://hdl.handle.net/11104/0348329