Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions

Detalhes bibliográficos
Autor(a) principal: Francisco Salzedas
Data de Publicação: 2020
Outros Autores: Syed I. W. Shah, Josef Havlícek, Juliane Stöckel, P. Hácek, Aleš Havránek
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/10216/126201
Resumo: A systematic study of COMPASS density limit disruptions (DLDs) was carried out to analyze the relation between the precursor magnetic island and its secondary instability (SI). In all of these plasmas, the SI was always found present at the onset of energy confinement erosion. The duration of this erosion was shorter for precursor quasi-locked island than for rotating island, and the larger the island amplitude, the shorter the duration. It was also found, at the onset of the erosion of energy confinement, an inverse relation between the magnetic island amplitude and its rotation frequency, showing that erosion can start at different values of precursor island amplitude, depending on what is its rotation frequency. DLDs occur either with smaller precursor island rotating faster or larger island rotating slower (quasi-locked). (c) 2020 Author(s).
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spelling Study of secondary instability of precursor magnetic island in COMPASS density limit disruptionsFísica, FísicaPhysics, Physical sciencesA systematic study of COMPASS density limit disruptions (DLDs) was carried out to analyze the relation between the precursor magnetic island and its secondary instability (SI). In all of these plasmas, the SI was always found present at the onset of energy confinement erosion. The duration of this erosion was shorter for precursor quasi-locked island than for rotating island, and the larger the island amplitude, the shorter the duration. It was also found, at the onset of the erosion of energy confinement, an inverse relation between the magnetic island amplitude and its rotation frequency, showing that erosion can start at different values of precursor island amplitude, depending on what is its rotation frequency. DLDs occur either with smaller precursor island rotating faster or larger island rotating slower (quasi-locked). (c) 2020 Author(s).2020-02-192020-02-19T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10216/126201eng10.1063/1.5123677Francisco SalzedasSyed I. W. ShahJosef HavlícekJuliane StöckelP. HácekAleš Havránekinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-29T14:22:12Zoai:repositorio-aberto.up.pt:10216/126201Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:59:50.140511Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
title Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
spellingShingle Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
Francisco Salzedas
Física, Física
Physics, Physical sciences
title_short Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
title_full Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
title_fullStr Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
title_full_unstemmed Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
title_sort Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
author Francisco Salzedas
author_facet Francisco Salzedas
Syed I. W. Shah
Josef Havlícek
Juliane Stöckel
P. Hácek
Aleš Havránek
author_role author
author2 Syed I. W. Shah
Josef Havlícek
Juliane Stöckel
P. Hácek
Aleš Havránek
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Francisco Salzedas
Syed I. W. Shah
Josef Havlícek
Juliane Stöckel
P. Hácek
Aleš Havránek
dc.subject.por.fl_str_mv Física, Física
Physics, Physical sciences
topic Física, Física
Physics, Physical sciences
description A systematic study of COMPASS density limit disruptions (DLDs) was carried out to analyze the relation between the precursor magnetic island and its secondary instability (SI). In all of these plasmas, the SI was always found present at the onset of energy confinement erosion. The duration of this erosion was shorter for precursor quasi-locked island than for rotating island, and the larger the island amplitude, the shorter the duration. It was also found, at the onset of the erosion of energy confinement, an inverse relation between the magnetic island amplitude and its rotation frequency, showing that erosion can start at different values of precursor island amplitude, depending on what is its rotation frequency. DLDs occur either with smaller precursor island rotating faster or larger island rotating slower (quasi-locked). (c) 2020 Author(s).
publishDate 2020
dc.date.none.fl_str_mv 2020-02-19
2020-02-19T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/10216/126201
url https://hdl.handle.net/10216/126201
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1063/1.5123677
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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