Development of a real-time algorithm for detection of the divertor detachment radiation front using multi-spectral imaging. (5th May 2020)

• Record Type: Journal Article
• Authors: Ravensbergen, T.; van Berkel, M.; Silburn, S.A.; Harrison, J.R.; Perek, A.; Verhaegh, K.; Vijvers, W.A.J.; Theiler, C.; Kirk, A.; de Baar, M.R.; the EUROfusion MST1 team,
• Is Part Of: Nuclear fusion. Volume 60:Number 6(2020)
• Publication Date: 2020-05-05
• Subjects: divertor detachment -- multispectral imaging -- real-time analysis -- tokamak; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/1741-4326/ab8183
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: In this paper we present a novel algorithm to extract the optical plasma boundary and radiation front for detached divertor plasmas. We show that reliable detection of the divertor leg and radiation front is possible using lightweight image processing tools. Using a non-tomographic approach, the detected divertor leg and radiation front can be mapped to the poloidal plane. This approach is fast and accurate enough for real-time control purposes, allowing in particular real-time plasma shape and detachment control, and post-shot detachment physics and dynamics analysis.