dc.creator | Zeeland, M. A. van | es |
dc.creator | Gorelenkov, N. N. | es |
dc.creator | Heidbrink, W. W. | es |
dc.creator | Kramer, G. J. | es |
dc.creator | Spong, D. A. | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-08-28T14:45:06Z | |
dc.date.available | 2020-08-28T14:45:06Z | |
dc.date.issued | 2012-09 | |
dc.identifier.citation | Van Zeeland, M.A., Gorelenkov, N.N., Heidbrink, W.W., Kramer, G.J., Spong, D.A. y García Muñoz, M. (2012). Alfven eigenmode stability and fast ion loss in DIII-D and ITER reversed magnetic shear plasmas. Nuclear Fusion, 52 (9), 094023-. | |
dc.identifier.issn | 0029-5515 | es |
dc.identifier.uri | https://hdl.handle.net/11441/100548 | |
dc.description.abstract | Neutral beam injection into reversed-magnetic shear DIII-D plasmas produces a variety of Alfvenic activity including ´
toroidicity-induced Alfven eigenmodes (TAEs) and reversed shear Alfv ´ en eigenmodes (RSAEs). With measured ´
equilibrium profiles as inputs, the ideal MHD code NOVA is used to calculate eigenmodes of these plasmas. The
postprocessor code NOVA-K is then used to perturbatively calculate the actual stability of the modes, including
finite orbit width and finite Larmor radius effects, and reasonable agreement with the spectrum of observed modes
is found. Using experimentally measured mode amplitudes, fast ion orbit following simulations have been carried
out in the presence of the NOVA calculated eigenmodes and are found to reproduce the dominant energy, pitch
and temporal evolution of the losses measured using a large bandwidth scintillator diagnostic. The same analysis
techniques applied to a DT 8 MA ITER steady-state plasma scenario with reversed-magnetic shear and both beam
ion and alpha populations show Alfven eigenmode instability. Both RSAEs and TAEs are found to be unstable ´
with maximum growth rates occurring for toroidal mode number n = 6 and the majority of the drive coming from
fast ions injected by the 1 MeV negative ion beams. AE instability due to beam ion drive is confirmed by the non-perturbative code TAEFL. Initial fast ion orbit following simulations using the unstable modes with a range of amplitudes (δB/B = 10−5–10−3) have been carried out and show negligible fast ion loss. The lack of fast ion loss is a result of loss boundaries being limited to large radii and significantly removed from the actual modes themselves. | es |
dc.description.sponsorship | US Department of Energy DE-FC02-04ER54698, DE-AC02-09CH11466, SC-G903402, DE-AC05-00OR22725, DE-FG03-97ER54415 | es |
dc.format | application/pdf | es |
dc.format.extent | 10 p. | es |
dc.language.iso | eng | es |
dc.publisher | IOP Publishing | es |
dc.relation.ispartof | Nuclear Fusion, 52 (9), 094023-. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | Alfven eigenmode stability and fast ion loss in DIII-D and ITER reversed magnetic shear plasmas | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/acceptedVersion | 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 | DE-FC02-04ER54698 | es |
dc.relation.projectID | DE-AC02-09CH11466 | es |
dc.relation.projectID | SC-G903402 | es |
dc.relation.projectID | DE-AC05-00OR22725 | es |
dc.relation.projectID | DE-FG03-97ER54415 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1088/0029-5515/52/9/094023 | es |
dc.identifier.doi | 10.1088/0029-5515/52/9/094023 | es |
dc.contributor.group | Universidad de Sevilla. RNM138: Física Nuclear Aplicada | es |
dc.journaltitle | Nuclear Fusion | es |
dc.publication.volumen | 52 | es |
dc.publication.issue | 9 | es |
dc.publication.initialPage | 094023 | es |