Ion heating in transitions to CERC in the stellarator TJ-II

Simple item page
dc.contributor.authorCastejón, F.
dc.contributor.authorFernández Pérez, Luis Antonio
dc.contributor.authorMartín Mayor, Víctor
dc.contributor.authorTarancón, A.
dc.contributor.authorVelasco, J. L.
dc.contributor.authorCX group, .
dc.date.accessioned2023-06-20T11:16:20Z
dc.date.available2023-06-20T11:16:20Z
dc.date.issued2008-01
dc.description© 2008 IAEA, Vienna. The authors acknowledge partial financial support from MEC (Spain), through research contract FIS2006-08533-C03, European Commission through contracts EGEE-II-031688 and int.eu.grid 031857 and from BSCH-UCM. J.L. Velasco is a DGA (Aragón, Spain) fellow.
dc.description.abstractIn TJ-II stellarator plasmas, in the electron cyclotron heating regime, an increase in the ion temperature is observed, synchronized with that of the electron temperature, during the transition to the core electron-root confinement (CERC) regime. This rise in ion temperature should be attributed to the joint action of the electron–ion energy transfer (which changes slightly during the CERC formation) and an enhancement of the ion confinement. This improvement must be related to the increase in the positive electric field in the core region. In this paper, we confirm this hypothesis by estimating the ion collisional transport in TJ-II under the physical conditions established before and after the transition to CERC. We calculate a large number of ion orbits in the guiding-centre approximation considering the collisions with a background plasma composed of electrons and ions. The ion temperature profile and the thermal flux are calculated in a self-consistent way, so that the change in the ion heat transport can be assessed.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMEC (Spain)
dc.description.sponsorshipEuropean Commission
dc.description.sponsorshipBSCH-UCM
dc.description.sponsorshipDGA (Aragón, Spain)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/37981
dc.identifier.citation[1] M. Yokoyama, et al., Fusion Science and Technology, 50, 327 (2006) [2] T. Estrada, et al., Nuclear Fusion, 47, 305 (2007). [3] F. Castejón, et al., Plasma Physics and Controlled Fusion, 49, 753 (2007). [4] A. Boozer, G. Kuo-Petravic, Plasma Physics, 24, 851,(1981). [5] P.E. Kloeden, R.A. Pearson, “The numerical solution of stochastic differential equations”, (J. Austral. Math. Soc., Ser. B, 20, pp. 8-12) (1997). [6] T.S. Chen, “A General form of the Coulomb scattering operators for Monte Carlo simulations and a note on the guiding center equations in different magnetic coordinate conventions”, IPP 0/50 Max-Planck-Institut für Plasmaphysik (1988).
dc.identifier.doi10.1088/0029-5515/48/6/065008
dc.identifier.issn0029-5515
dc.identifier.officialurlhttp://doi.org/10.1088/0029-5515/48/6/065008
dc.identifier.urihttps://hdl.handle.net/20.500.14352/51901
dc.issue.number6
dc.journal.titleNuclear fusion
dc.language.isoeng
dc.publisherINT Atomic Energy Agency
dc.relation.projectIDFIS2006-08533-C03
dc.relation.projectIDEGEE-II-031688
dc.relation.projectIDint.eu.grid 031857
dc.rights.accessRightsopen access
dc.subject.cdu53
dc.subject.cdu51-73
dc.subject.keywordRational magnetic-surfaces
dc.subject.keywordNeutral beam injection
dc.subject.keywordLarge helical device
dc.subject.keywordECRH plasmas
dc.subject.keywordTransport barrier
dc.subject.keywordConfinement
dc.subject.keywordCore.
dc.subject.ucmFísica (Física)
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.unesco22 Física
dc.titleIon heating in transitions to CERC in the stellarator TJ-II
dc.typejournal article
dc.volume.number48
dspace.entity.typePublication
relation.isAuthorOfPublication146096b1-5825-4230-8ad9-b2dad468673b
relation.isAuthorOfPublication061118c0-eadf-4ee3-8897-2c9b65a6df66
relation.isAuthorOfPublication.latestForDiscovery146096b1-5825-4230-8ad9-b2dad468673b
Download
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
FernándezPérezLuisAntonio78LIBRE PREPRINT.pdf
Size:
61.94 KB
Format:
Adobe Portable Document Format
downoload Download
Collections
Artículos