Large-scale collecting mirrors for ITER optical diagnostic. (1st August 2022)

• Record Type: Journal Article
• Authors: Samsonov, D.; Tereschenko, I.; Mukhin, E.; Gubal, A.; Kapustin, Yu.; Filimonov, V.; Babinov, N.; Dmitriev, A.; Nikolaev, A.; Komarevtsev, I.; Koval, A.; Litvinov, A.; Marchii, G.; Razdobarin, A.; Snigirev, L.; Tolstyakov, S.; Marinin, G.; Terentev, D.; Gorodetsky, A.; Zalavutdinov, R.; Markin, A.; Bukhovets, V.; Arkhipushkin, I.; Borisov, A.; Khripunov, V.; Mikhailovskii, V.; Modestov, V.; Kirienko, I.; Buslakov, I.; Chernakov, P.; Mokeev, A.; Kempenaars, M.; Shigin, P.; Drapiko, E.;
• Is Part Of: Nuclear fusion. Volume 62:Number 8(2022)
• Publication Date: 2022-08-01
• Subjects: large-scale mirrors -- protected silver coating -- long-term optical stability -- ITER diagnostics; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/1741-4326/ac544d
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: The challenges of a large-scale mirror design for the in-vessel collection system of ITER divertor Thomson scattering (DTS) are under consideration. These are the mirrors located out-of-line vision of fusion plasma (so called 'second mirrors') with a high-reflective Ag-based coating. The paper outlines: approaches providing optical surface shape and angular position stability; Ag coating applicability for ITER in-vessel environment, including resistance to accidental steam ingress. The proposed solutions may also appear to be of some use in other ITER diagnostics and in diagnostics of other fusion devices.