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Assessment of linear disruption predictors using JT-60U data

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dc.contributor.authorVega, J.
dc.contributor.authorHernández, F.
dc.contributor.authorIsayama, A.
dc.contributor.authorJoffrin, E.
dc.contributor.authorMatsunaga, G.
dc.contributor.authorSuzuki, T.
dc.contributor.authorDormido Canto, Sebastián
dc.date.accessioned2024-05-20T11:34:19Z
dc.date.available2024-05-20T11:34:19Z
dc.date.issued2019-09
dc.description.abstractDisruptions 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.en
dc.description.versionversión final
dc.identifier.doihttp://doi.org/10.1016/j.fusengdes.2019.02.061
dc.identifier.issn1873-7196
dc.identifier.urihttps://hdl.handle.net/20.500.14468/12240
dc.journal.issuePart A
dc.journal.titleFusion Engineering and Design
dc.journal.volume146
dc.language.isoen
dc.publisherElsevier
dc.relation.centerE.T.S. de Ingeniería Informática
dc.relation.departmentInformática y Automática
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject.keywordsDisruption prediction
dc.subject.keywordsSignal increments
dc.subject.keywordsJT-60SA
dc.subject.keywordsNearest centroid
dc.subject.keywordsITER
dc.subject.keywordsNuclear fusion
dc.titleAssessment of linear disruption predictors using JT-60U dataes
dc.typejournal articleen
dc.typeartículoes
dspace.entity.typePublication
relation.isAuthorOfPublicationf5f57d8a-f3c0-40a1-a93c-80d6237a2bcb
relation.isAuthorOfPublication.latestForDiscoveryf5f57d8a-f3c0-40a1-a93c-80d6237a2bcb
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