dc.creator | Lawson, K.D. | es |
dc.creator | Aggarwal, K.M. | es |
dc.creator | Coffey, I.H. | es |
dc.creator | Keenan, F.P. | es |
dc.creator | O'Mullane, M.G. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-07-08T14:23:20Z | |
dc.date.available | 2020-07-08T14:23:20Z | |
dc.date.issued | 2019-02-28 | |
dc.identifier.citation | Lawson, K.D., Aggarwal, K.M., Coffey, I.H., Keenan, F.P., O'Mullane, M.G., Jet Contributors, y García Muñoz, M. (2019). Population modelling of the He II energy levels in tokamak plasmas: I. Collisional excitation model. Journal of Physics B-Atomic Molecular and Optical Physics, 52 (4), 1-45. | |
dc.identifier.issn | 1361-6455 | es |
dc.identifier.uri | https://hdl.handle.net/11441/99059 | |
dc.description.abstract | Helium is widely used as a fuel or minority gas in laboratory fusion experiments, and will
be present as ash in DT thermonuclear plasmas. It is therefore essential to have a good
understanding of its atomic physics. To this end He II population modelling has been
undertaken for the spectroscopic levels arising from shells with principal quantum number n =
1 to 5. This paper focuses on a collisional excitation model; ionization and recombination
will be considered in a subsequent article. Heavy particle collisional excitation rate
coefficients have been generated to supplement the currently-available atomic data for He II,
and are presented for proton, deuteron, triton and α-particle projectiles. The widely-used
criterion for levels within an n shell being populated in proportion to their statistical weights
is reassessed with the most recent atomic data, and found not to apply to the He II levels at
tokamak densities (1018–1021 m-3). Consequences of this and other likely sources of errors are
quantified, as is the effect of differing electron and ion temperatures. Line intensity ratios,
including the so-called ‘branching ratios’ and the fine-structure β1, β2, β3 and γ ratios, are
discussed, the latter with regard to their possible use as diagnostics. | es |
dc.description.sponsorship | EURATOM 633053 | es |
dc.description.sponsorship | Research Councils UK EP/P012450/1 | es |
dc.format | application/pdf | es |
dc.format.extent | 45 p. | es |
dc.language.iso | eng | es |
dc.publisher | IOP Publishing | es |
dc.relation.ispartof | Journal of Physics B-Atomic Molecular and Optical Physics, 52 (4), 1-45. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | Population modelling of the He II energy levels in tokamak plasmas: I. Collisional excitation model | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/submittedVersion | 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/P012450/1 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1088/1361-6455/aaf703 | es |
dc.identifier.doi | 10.1088/1361-6455/aaf703 | es |
dc.contributor.group | Universidad de Sevilla. RNM138: Física Nuclear Aplicada | es |
dc.journaltitle | Journal of Physics B-Atomic Molecular and Optical Physics | es |
dc.publication.volumen | 52 | es |
dc.publication.issue | 4 | es |
dc.publication.initialPage | 1 | es |
dc.publication.endPage | 45 | es |