dc.creator | Chapman, S. C. | es |
dc.creator | Dendy, R. O. | es |
dc.creator | Todd, T. N. | es |
dc.creator | Watkins, N. W. | es |
dc.creator | Calderon, F. A. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-08-28T13:48:17Z | |
dc.date.available | 2020-08-28T13:48:17Z | |
dc.date.issued | 2015-07 | |
dc.identifier.citation | Chapman, S.C., Dendy, R.O., Todd, T.N., Watkins, N.W., Calderon, F.A., Jet Contributors, y García Muñoz, M. (2015). The global build-up to intrinsic edge localized mode bursts seen in divertor full flux loops in JET. Physics of Plasma, 22 (7), 072506-1-072506-12. https://doi.org/10.1063/1.4926592. | |
dc.identifier.uri | https://hdl.handle.net/11441/100540 | |
dc.description.abstract | A global signature of the build-up to an intrinsic edge localized mode (ELM) is found in the temporal analytic phase of signals measured in full flux azimuthal loops in the divertor region of JET.
Toroidally integrating, full flux loop signals provide a global measurement proportional to the voltage induced by changes in poloidal magnetic flux; they are electromagnetically induced by the dynamics of spatially integrated current density. We perform direct time-domain analysis of the high
time-resolution full flux loop signals VLD2 and VLD3. We analyze plasmas where a steady Hmode is sustained over several seconds during which all the observed ELMs are intrinsic; there is
no deliberate intent to pace the ELMing process by external means. ELM occurrence times are
determined from the Be II emission at the divertor. We previously [Chapman et al., Phys. Plasmas
21, 062302 (2014); Chapman et al., in 41st EPS Conference on Plasma Physics, Europhysics
Conference Abstracts (European Physical Society, 2014), Vol. 38F, ISBN 2-914771-90-8] found
that the occurrence times of intrinsic ELMs correlate with specific temporal analytic phases of the
VLD2 and VLD3 signals. Here, we investigate how the VLD2 and VLD3 temporal analytic phases
vary with time in advance of the ELM occurrence time. We identify a build-up to the ELM in
which the VLD2 and VLD3 signals progressively align to the temporal analytic phase at which
ELMs preferentially occur, on a 2 5ms timescale. At the same time, the VLD2 and VLD3 signals become temporally phase synchronized with each other, consistent with the emergence of
coherent global dynamics in the integrated current density. In a plasma that remains close to a
global magnetic equilibrium, this can reflect bulk displacement or motion of the plasma. This
build-up signature to an intrinsic ELM can be extracted from a time interval of data that does not
extend beyond the ELM occurrence time, so that these full flux loop signals could assist in ELM
prediction or mitigation. | es |
dc.description.sponsorship | EURATOM 633053 | es |
dc.description.sponsorship | RCUK Energy Programme EP/I501045 | es |
dc.format | application/pdf | es |
dc.format.extent | 13 p. | es |
dc.language.iso | eng | es |
dc.publisher | AIP Publishing | es |
dc.relation.ispartof | Physics of Plasma, 22 (7), 072506-1-072506-12. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | The global build-up to intrinsic edge localized mode bursts seen in divertor full flux loops in JET | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.relation.projectID | 633053 | es |
dc.relation.projectID | EP/I501045 | es |
dc.relation.publisherversion | https://doi.org/10.1063/1.4926592 | es |
dc.identifier.doi | 10.1063/1.4926592 | es |
dc.contributor.group | Universidad de Sevilla. RNM138: Física Nuclear Aplicada | es |
dc.journaltitle | Physics of Plasma | es |
dc.publication.volumen | 22 | es |
dc.publication.issue | 7 | es |
dc.publication.initialPage | 072506-1 | es |
dc.publication.endPage | 072506-12 | es |