dc.creator | Zeeland, M. A. van | es |
dc.creator | Ferraro, N. M. | es |
dc.creator | Heidbrink, W. W. | es |
dc.creator | Kramer, G. J. | es |
dc.creator | Pace, D. C. | es |
dc.creator | Chen, X. | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-09-02T14:20:39Z | |
dc.date.available | 2020-09-02T14:20:39Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Van Zeeland, M.A., Ferraro, N.M., Heidbrink, W.W., Kramer, G.J., Pace, D.C., Chen, X. y García Muñoz, M. (2014). Modulation of prompt fast-ion loss by applied n=2 fields in the DIII-D tokamak. Plasma Physics and Controlled Fusion, 56 (1), 015009-. | |
dc.identifier.issn | 0741-3335 | es |
dc.identifier.issn | 1361-6587 | es |
dc.identifier.uri | https://hdl.handle.net/11441/100651 | |
dc.description.abstract | Energy and pitch angle resolved measurements of escaping neutral beam ions (E approximate to 80 keV) have been made during DIII-D L-mode discharges with applied, slowly rotating, n = 2 magnetic perturbations. Data from separate scintillator detectors (FILDs) near and well below the plasma midplane show fast-ion losses correlated with the internal coil (I-coil) fields. The dominant fast-ion loss signals are observed to decay within one poloidal transit time after beam turn-off indicating they are primarily prompt loss orbits. Also, during application of the rotating I-coil fields, outboard midplane edge density and bremsstrahlung emission profiles exhibit a radial displacement of up to delta R approximate to 1 cm. Beam deposition and full orbit modeling of these losses using M3D-C1 calculations of the perturbed kinetic profiles and fields reproduce many features of the measured losses. In particular, the predicted phase of the modulated loss signal with respect to the I-coil currents is in close agreement with FILD measurements as is the relative amplitudes of the modulated losses for the co and counter-current beam used in the experiment. These simulations show modifications to the beam ion birth profile and subsequent prompt loss due to changes in the edge density; however, the dominant factor causing modulation of the losses to the fast-ion loss detectors is the perturbed magnetic field (delta B/B approximate to 10(-3) in the plasma). Calculations indicate total prompt loss to the DIII-D wall can increase with application of the n = 2 perturbation by up to 7% for co-current injected beams and 3% for counter-current injected beams depending on phase of the perturbation relative to the injected beam. | es |
dc.description.sponsorship | US Department of Energy DE-FC02-04ER54698, SC-G903402, DEAC02- 09CH11466, DE-FG02-04ER54761, DE-FG02- 05ER54808 | 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 | Plasma Physics and Controlled Fusion, 56 (1), 015009-. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Tokamaks | es |
dc.subject | Spherical tokamaks | es |
dc.subject | Particle measurements | es |
dc.subject | Fusion products effects (e.g. alpha-particles, etc) | es |
dc.subject | Fast particle effects | es |
dc.subject | Particle orbit and trajectory | es |
dc.subject | Plasma heating by particle beams | es |
dc.title | Modulation of prompt fast-ion loss by applied n=2 fields in the DIII-D tokamak | 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 | DE-FC02-04ER54698 | es |
dc.relation.projectID | SC-G903402 | es |
dc.relation.projectID | DEAC02- 09CH11466 | es |
dc.relation.projectID | DE-FG02-04ER54761 | es |
dc.relation.projectID | DE-FG02- 05ER54808 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1088/0741-3335/56/1/015009 | es |
dc.identifier.doi | 10.1088/0741-3335/56/1/015009 | es |
dc.journaltitle | Plasma Physics and Controlled Fusion | es |
dc.publication.volumen | 56 | es |
dc.publication.issue | 1 | es |
dc.publication.initialPage | 015009 | es |