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Towards a new image processing system at Wendelstein 7-X: From spatial calibration to characterization of thermal events

W7-X Team; Pisano, F.; Cannas, B.; Jakubowski, M. W.; Niemann, H.; Puig Sitjes, A.; Wurden, G. A.; Gantenbein, Gerd; Huber, Martina; Hunger, Hermann; Illy, Stefan; Jelonnek, John; Kobarg, Thorsten; Lang, Rouven; Leonhardt, Wolfgang; Losert, M.; Meier, A.; Mellein, Daniel; Papenfuß, Daniel; Samartsev, Andrey; Scherer, Theo; ... mehr

Abstract (englisch):
Wendelstein 7-X (W7-X) is the most advanced fusion experiment in the stellarator line and is aimed at proving that the stellarator concept is suitable for a fusion reactor. One of the most important issues for fusion reactors is the monitoring of plasma facing components when exposed to very high heat loads, through the use of visible and infrared (IR) cameras. In this paper, a new image processing system for the analysis of the strike lines on the inboard limiters from the first W7-X experimental campaign is presented. This system builds a model of the IR cameras through the use of spatial calibration techniques, helping to characterize the strike lines by using the information given by real spatial coordinates of each pixel. The characterization of the strike lines is made in terms of position, size, and shape, after projecting the camera image in a 2D grid which tries to preserve the curvilinear surface distances between points. The description of the strike-line shape is made by means of the Fourier Descriptors.

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Originalveröffentlichung
DOI: 10.1063/1.5045560
Scopus
Zitationen: 5
Web of Science
Zitationen: 6
Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2018
Sprache Englisch
Identifikator ISSN: 0034-6748, 1089-7623
KITopen-ID: 1000104273
HGF-Programm 31.03.02 (POF III, LK 01)
Plasma Heizsysteme
Erschienen in Review of scientific instruments
Band 89
Heft 12
Seiten 123503
Projektinformation EUROfusion (EU, H2020, 633053)
Nachgewiesen in Web of Science
Scopus
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