Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma

Autores
Bouzat, Sebastian
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In magnetically confined plasmas, the second derivative of the density is known to be related to the ExB velocity shear that rules the transitions to improved confinement regimes. In this work we present a cellular automata model for transport that includes diffusion and avalanche-like mechanisms controlled by critical parameters. Assuming the hypothesis that a strong negative value of the second derivative of the density reduces the strength of avalanches, the model shows the emergence of different confinement regimes that are found to be analog to Low (L), High (H) and Very High (VH) confinement modes in real plasma. Transitions between such regimes can be controlled by the parameter representing the fuelling intensity. In particular, the model reproduces the formation of a pedestal during the transition from L to H confinement regimes, and shows hysteresis phenomena.
Fil: Bouzat, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Materia
fusion plasma
cellular automata
L H transitions
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/279502
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/279502
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasmaBouzat, Sebastianfusion plasmacellular automataL H transitionshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In magnetically confined plasmas, the second derivative of the density is known to be related to the ExB velocity shear that rules the transitions to improved confinement regimes. In this work we present a cellular automata model for transport that includes diffusion and avalanche-like mechanisms controlled by critical parameters. Assuming the hypothesis that a strong negative value of the second derivative of the density reduces the strength of avalanches, the model shows the emergence of different confinement regimes that are found to be analog to Low (L), High (H) and Very High (VH) confinement modes in real plasma. Transitions between such regimes can be controlled by the parameter representing the fuelling intensity. In particular, the model reproduces the formation of a pedestal during the transition from L to H confinement regimes, and shows hysteresis phenomena.Fil: Bouzat, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaIOP Publishing2008-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/279502Bouzat, Sebastian; Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma; IOP Publishing; Plasma Physics And Controlled Fusion; 50; 6-2008; 85013-85013140741-3335CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/0741-3335/50/8/085013info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T12:55:14Zoai:ri.conicet.gov.ar:11336/279502instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-02-06 12:55:15.162CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
title Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
spellingShingle Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
Bouzat, Sebastian
fusion plasma
cellular automata
L H transitions
title_short Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
title_full Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
title_fullStr Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
title_full_unstemmed Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
title_sort Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma
dc.creator.none.fl_str_mv Bouzat, Sebastian
author Bouzat, Sebastian
author_facet Bouzat, Sebastian
author_role author
dc.subject.none.fl_str_mv fusion plasma
cellular automata
L H transitions
topic fusion plasma
cellular automata
L H transitions
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In magnetically confined plasmas, the second derivative of the density is known to be related to the ExB velocity shear that rules the transitions to improved confinement regimes. In this work we present a cellular automata model for transport that includes diffusion and avalanche-like mechanisms controlled by critical parameters. Assuming the hypothesis that a strong negative value of the second derivative of the density reduces the strength of avalanches, the model shows the emergence of different confinement regimes that are found to be analog to Low (L), High (H) and Very High (VH) confinement modes in real plasma. Transitions between such regimes can be controlled by the parameter representing the fuelling intensity. In particular, the model reproduces the formation of a pedestal during the transition from L to H confinement regimes, and shows hysteresis phenomena.
Fil: Bouzat, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
description In magnetically confined plasmas, the second derivative of the density is known to be related to the ExB velocity shear that rules the transitions to improved confinement regimes. In this work we present a cellular automata model for transport that includes diffusion and avalanche-like mechanisms controlled by critical parameters. Assuming the hypothesis that a strong negative value of the second derivative of the density reduces the strength of avalanches, the model shows the emergence of different confinement regimes that are found to be analog to Low (L), High (H) and Very High (VH) confinement modes in real plasma. Transitions between such regimes can be controlled by the parameter representing the fuelling intensity. In particular, the model reproduces the formation of a pedestal during the transition from L to H confinement regimes, and shows hysteresis phenomena.
publishDate 2008
dc.date.none.fl_str_mv 2008-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/279502
Bouzat, Sebastian; Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma; IOP Publishing; Plasma Physics And Controlled Fusion; 50; 6-2008; 85013-8501314
0741-3335
CONICET Digital
CONICET
url http://hdl.handle.net/11336/279502
identifier_str_mv Bouzat, Sebastian; Cellular automata model for transitions to improved Cellular automata model for transitions to improved confinement regimes in fusion plasma; IOP Publishing; Plasma Physics And Controlled Fusion; 50; 6-2008; 85013-8501314
0741-3335
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/0741-3335/50/8/085013
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1856403305084747776
score 13.106097

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