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dc.contributor.authorBak, J. G.
dc.contributor.authorPitts, RA
dc.contributor.authorKim, HS
dc.contributor.authorLee, H
dc.contributor.authorBin, C.
dc.contributor.authorJuhn, JW
dc.contributor.authorHong, SH
dc.contributor.authorGarcia, Odd Erik
dc.contributor.authorKube, Ralph Arthur
dc.contributor.authorSeo, DC
dc.date.accessioned2019-11-27T20:28:37Z
dc.date.available2019-11-27T20:28:37Z
dc.date.issued2016-12-27
dc.description.abstractScrape-off layer (SOL) widths <i>λ<sub>q</sub></i> are presented from the KSTAR tokamak using fast reciprocating Langmuir probe assembly (FRLPA) measurements at the outboard mid-plane (OMP) and the infra-Red (IR) thermography at inboard limiter tiles in moderately elongated (<i>κ</i> = 1.45 – 1.55) L-mode inner wall-limited (IWL) plasmas under experimental conditions such as B<sub>T</sub> = 2.0 T, P<sub>NBI</sub> = 1.4 – 1.5 MW, line averaged densities 2.5 – 5.1 × 10<sup>19</sup> m<sup>−3</sup>) and plasma current <i>I<sub>p</sub></i> = 0.4 − 0.7 MA. There is clear evidence for a double exponential structure in <i>q</i>||(r) from the FRLPA such that, for example at <i>I<sub>p</sub></i> = 0.6 MA, a narrow feature, <i>λ<sub>q,near</sub></i> (=3.5 mm) is found close to the LFCS, followed by a broader width, <i>λ<sub>q,main</sub></i> (=57.0 mm). Double exponential profiles (<i>λ<sub>q,near</sub></i> = 1.5 – 2.8 mm, <i>λ<sub>q,main</sub></i> = 17.0 – 35.0 mm) can be also observed in the IR heat flux mapped to the OMP throughout the range of <i>I<sub>p</sub></i> investigated. In addition, analysis of SOL turbulence statistics obtained with the FRLPA shows high relative fluctuation levels and positively skewed distributions in electron temperature and ion particle flux across the SOL, with both properties increasing for longer distance from the LCFS, as often previously observed in the tokamaks. Interestingly, the fluctuation character expressed in terms of spectral distributions remains unchanged in passing from the narrow to the broad SOL heat flux channel.en_US
dc.description<a href=https://doi.org/10.1016/j.nme.2016.12.001>https://doi.org/10.1016/j.nme.2016.12.001</a>.en_US
dc.identifier.citationBak, Pitts R, Kim H, Lee H, Bin, Juhn, Hong, Garcia OE, Kube RA, Seo. Measurement of inner wall limiter SOL widths in KSTAR tokamak. Nuclear Materials and Energy. 2016;12:1270-1276en_US
dc.identifier.cristinIDFRIDAID 1460010
dc.identifier.doi10.1016/j.nme.2016.12.001
dc.identifier.issn2352-1791
dc.identifier.urihttps://hdl.handle.net/10037/16744
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalNuclear Materials and Energy
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRINATEK/240510/Norway/Turbulence and transport at the boundary of fusion plasmas//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437en_US
dc.titleMeasurement of inner wall limiter SOL widths in KSTAR tokamaken_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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