Assessment of linear disruption predictors using JT-60U data

Vega, J., Hernández, F., Dormido Canto, Sebastián, Isayama, A., Joffrin, E., Matsunaga, G. y Suzuki, T. . (2019) Assessment of linear disruption predictors using JT-60U data. Fusion Engineering and Design

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Título Assessment of linear disruption predictors using JT-60U data
Autor(es) Vega, J.
Hernández, F.
Dormido Canto, Sebastián
Isayama, A.
Joffrin, E.
Matsunaga, G.
Suzuki, T.
Materia(s) Informática
Abstract Disruptions are dangerous events in tokamaks that require mitigation methods to alleviate its detrimental effects. A prerequisite to trigger any mitigation action is the existence of a reliable disruption predictor. This article assesses a predictor that relates in a linear way consecutive samples of a single quantity (in particular, the magnetic perturbation time derivative signal has been used). With this kind of predictor, the recognition of disruptions does not depend on how large the signal amplitude is but on how large the signal increments are: small increments mean smooth plasma evolution whereas abrupt increments reflect a non-smooth evolution and potential risk of disruption. Results are presented with data from the JT-60U tokamak and high-beta discharges. Two training methods have been tested: a classical approach in which the more data for training the better and an adaptive method that starts from scratch. In both cases the success rate is about 95%. It should be noted that predictors based on signal increments and their adaptive versions can be of big interest for next devices such as JT-60SA or ITER.
Palabras clave Disruption prediction
Signal increments
Nearest centroid
Nuclear fusion
Editor(es) Elsevier
Fecha 2019-09
Formato application/pdf
Identificador bibliuned:557-Sdormido-0065
DOI - identifier 10.1016/j.fusengdes.2019.02.061
ISSN - identifier 1873-7196
Nombre de la revista Fusion Engineering and Design
Número de Volumen 146
Número de Issue Part A
Página inicial 1291
Página final 1294
Publicado en la Revista Fusion Engineering and Design
Idioma eng
Versión de la publicación acceptedVersion
Tipo de recurso Article
Derechos de acceso y licencia
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in Fusion Engineering and Design, is available online at the publisher's website: Elsevier
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Fusion Engineering and Design, está disponible en línea en el sitio web del editor: Elsevier

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Creado: Mon, 29 Jan 2024, 23:33:16 CET