Sawtooth, neo-classical tearing mode and error field studies in JET
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Livro |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/10216/371 |
Resumo: | A range of ITER relevant plasma stability issues have been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawteeth seeds, scaling of (2,1) NTM thresholds and the effect of error fields on plasma rotation and vice-versa. The sawtooth studies have examined both the effects of ICRF and NBI fast particles, and models used for ITER predictions have been validated. Large sawteeth, due to fast particle stabilisation, have been shown to trigger m=3, n=2 NTMs at low beta. Conversely the use of ICCD to produce small short period sawteeth has been shown to raise the NTM beta-limit, suggesting the value of local current drive near q=1. The m=2, n=1 NTM, which when destabilised results in severe degradation of plasma performance, has been studied in a joint scaling experiment with the DIII-D tokamak. These experiments using closely matched non-dimensional parameters (plasma shape, R/a, q, gyro-radius and collisionality) on DIII-D and JET show similar NTM beta-limits and consistent scalings. The issue of error field thresholds and their variation with plasma rotation has also been studied, helping to clarify scalings to ITER. |
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Sawtooth, neo-classical tearing mode and error field studies in JETFísicaPhysical sciencesA range of ITER relevant plasma stability issues have been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawteeth seeds, scaling of (2,1) NTM thresholds and the effect of error fields on plasma rotation and vice-versa. The sawtooth studies have examined both the effects of ICRF and NBI fast particles, and models used for ITER predictions have been validated. Large sawteeth, due to fast particle stabilisation, have been shown to trigger m=3, n=2 NTMs at low beta. Conversely the use of ICCD to produce small short period sawteeth has been shown to raise the NTM beta-limit, suggesting the value of local current drive near q=1. The m=2, n=1 NTM, which when destabilised results in severe degradation of plasma performance, has been studied in a joint scaling experiment with the DIII-D tokamak. These experiments using closely matched non-dimensional parameters (plasma shape, R/a, q, gyro-radius and collisionality) on DIII-D and JET show similar NTM beta-limits and consistent scalings. The issue of error field thresholds and their variation with plasma rotation has also been studied, helping to clarify scalings to ITER.20022002-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookapplication/pdfhttps://hdl.handle.net/10216/371engT. C. HenderO. SauterB. AlperC. AngioniM. BaarM. BenedettiP. BeloM. BigiD. N. BorbaT. BolzonellaR. BudnyR. J. ButteryA. GondhalekarN. N. GorelenkovA. GudeS. GuenterT. HellstenD. F. HowellR. KoslowkiR. J. HayeA. W. HyattLamalleE. LazzaroM. J. MantsinenM. MaraschekM. L. MayoralK.G. McClementsF. MilaniF. NabaisM.F.F. NaveF. NguyenS. NowakA. L. PecquetC. PerezC. C. PettyS. D. PinchesA. PochelonS. PoddaJ. RappF. SalzedasF SartoriS. E. SharapovM. StampD. TestaE. WesterhofP. C. VriesP. ZancaJET contributorsinfo: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:RCAAP2023-11-29T16:00:50Zoai:repositorio-aberto.up.pt:10216/371Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:36:39.073017Repositório 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 |
Sawtooth, neo-classical tearing mode and error field studies in JET |
title |
Sawtooth, neo-classical tearing mode and error field studies in JET |
spellingShingle |
Sawtooth, neo-classical tearing mode and error field studies in JET T. C. Hender Física Physical sciences |
title_short |
Sawtooth, neo-classical tearing mode and error field studies in JET |
title_full |
Sawtooth, neo-classical tearing mode and error field studies in JET |
title_fullStr |
Sawtooth, neo-classical tearing mode and error field studies in JET |
title_full_unstemmed |
Sawtooth, neo-classical tearing mode and error field studies in JET |
title_sort |
Sawtooth, neo-classical tearing mode and error field studies in JET |
author |
T. C. Hender |
author_facet |
T. C. Hender O. Sauter B. Alper C. Angioni M. Baar M. Benedetti P. Belo M. Bigi D. N. Borba T. Bolzonella R. Budny R. J. Buttery A. Gondhalekar N. N. Gorelenkov A. Gude S. Guenter T. Hellsten D. F. Howell R. Koslowki R. J. Haye A. W. Hyatt Lamalle E. Lazzaro M. J. Mantsinen M. Maraschek M. L. Mayoral K.G. McClements F. Milani F. Nabais M.F.F. Nave F. Nguyen S. Nowak A. L. Pecquet C. Perez C. C. Petty S. D. Pinches A. Pochelon S. Podda J. Rapp F. Salzedas F Sartori S. E. Sharapov M. Stamp D. Testa E. Westerhof P. C. Vries P. Zanca JET contributors |
author_role |
author |
author2 |
O. Sauter B. Alper C. Angioni M. Baar M. Benedetti P. Belo M. Bigi D. N. Borba T. Bolzonella R. Budny R. J. Buttery A. Gondhalekar N. N. Gorelenkov A. Gude S. Guenter T. Hellsten D. F. Howell R. Koslowki R. J. Haye A. W. Hyatt Lamalle E. Lazzaro M. J. Mantsinen M. Maraschek M. L. Mayoral K.G. McClements F. Milani F. Nabais M.F.F. Nave F. Nguyen S. Nowak A. L. Pecquet C. Perez C. C. Petty S. D. Pinches A. Pochelon S. Podda J. Rapp F. Salzedas F Sartori S. E. Sharapov M. Stamp D. Testa E. Westerhof P. C. Vries P. Zanca JET contributors |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
T. C. Hender O. Sauter B. Alper C. Angioni M. Baar M. Benedetti P. Belo M. Bigi D. N. Borba T. Bolzonella R. Budny R. J. Buttery A. Gondhalekar N. N. Gorelenkov A. Gude S. Guenter T. Hellsten D. F. Howell R. Koslowki R. J. Haye A. W. Hyatt Lamalle E. Lazzaro M. J. Mantsinen M. Maraschek M. L. Mayoral K.G. McClements F. Milani F. Nabais M.F.F. Nave F. Nguyen S. Nowak A. L. Pecquet C. Perez C. C. Petty S. D. Pinches A. Pochelon S. Podda J. Rapp F. Salzedas F Sartori S. E. Sharapov M. Stamp D. Testa E. Westerhof P. C. Vries P. Zanca JET contributors |
dc.subject.por.fl_str_mv |
Física Physical sciences |
topic |
Física Physical sciences |
description |
A range of ITER relevant plasma stability issues have been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawteeth seeds, scaling of (2,1) NTM thresholds and the effect of error fields on plasma rotation and vice-versa. The sawtooth studies have examined both the effects of ICRF and NBI fast particles, and models used for ITER predictions have been validated. Large sawteeth, due to fast particle stabilisation, have been shown to trigger m=3, n=2 NTMs at low beta. Conversely the use of ICCD to produce small short period sawteeth has been shown to raise the NTM beta-limit, suggesting the value of local current drive near q=1. The m=2, n=1 NTM, which when destabilised results in severe degradation of plasma performance, has been studied in a joint scaling experiment with the DIII-D tokamak. These experiments using closely matched non-dimensional parameters (plasma shape, R/a, q, gyro-radius and collisionality) on DIII-D and JET show similar NTM beta-limits and consistent scalings. The issue of error field thresholds and their variation with plasma rotation has also been studied, helping to clarify scalings to ITER. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002 2002-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/book |
format |
book |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/10216/371 |
url |
https://hdl.handle.net/10216/371 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136274458607616 |