Alternative system design concepts for the ITER core CXRS upper port plug front end

• Published in: Fusion engineering and design Vol. 86; no. 6; pp. 1306 - 1309
• Main Authors: Krimmer, A., Klinkhamer, F., Biel, W., Hawkes, N., Kiss, G., Koning, J.F., Krasikov, Yu, Neubauer, O.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2011; Elsevier
• Subjects: Applied sciences; Channels; Controled nuclear fusion plants; Core CXRS; Design engineering; Diagnostic; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Installations for energy generation and conversion: thermal and electrical energy; ITER; Maintenance; Ports; Remote handling; Shutters; System design concepts; Systems design; Tubes; Upper port plug; Diagnostic; Core CXRS; ITER; Upper port plug; System design concepts; Tokamak; Nuclear fusion reactor; Lifetime; Maintenance; Remote handling; Reactor core
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2011.04.049

► System design for the core CXRS diagnostic port plug for ITER is investigated. ► Dependencies of the sub-systems are given. ► Overall system lifetime and recent mechanical changes are taken into account. ► System configurations are derived for the current ITER design. The upper port #3 in ITER will be used by the core Charge Exchange Recombination Spectroscopy (core CXRS) to channel out light from the inside of the vacuum vessel. Recent research about the lifetime of the first two mirrors and changes in the upper port plug geometry initiated further investigations into possible alternative system design concepts. Two new variants of the optical system were chosen for further investigation. The different sub-systems of core CXRS such as optical system, retractable tube and shutter are introduced together with their impact on the system design and their interactions. Space constraints originating from the envelope of the UPP and requirements emerging from the ITER environment such as remote handling and other maintenance considerations are also included in the investigation. Alternative system concepts taking the constraints into account are presented and discussed. Implications for further design work on the subsystems are derived from the results.