2024-03-28T10:45:26Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00027059
2023-01-16T04:17:51Z
320:321:322
Characterized divertor footprint profile modification with the edge pressure gradient in the Large Helical Device
Tanaka, H
88645
Masuzaki, S
88646
Kawamura, G
88647
Kobayashi, M
88648
Suzuki, Y
88649
Motojima, G
88650
Murase, T
88651
Morisaki, T
88652
Ohno, N
88653
divertor footprint profile
Langmuir probe
multivariable analysis
proper orthogonal decomposition
LHD
The first attempt to characterize the divertor footprint profile in the heliotron device LHD was done, by using a number of Langmuir probes and the multivariable analysis technique. In order to clarify the generation mechanism of the private-side peak on the footprint profile, which has not been reproduced in the modeling study, over 6000 time points were extracted by excluding time points with profile modifications due to already-known reasons. A characterization index ${r}_{2/1}$ was newly defined from the multivariable analysis result, and its dependences on upstream parameters were investigated. As a result, it was found that the footprint profile correlates with the pressure gradient at the edge inside the core region with a fixed beta, suggesting that change of the plasma pressure profile could modify the edge magnetic field structure even if the volume integral of the plasma pressure was constant.
ファイル公開:2019-12-01
journal article
IOP publishing
2018-12
application/pdf
Plasma Physics and Controlled Fusion
12
60
125001
0741-3335
https://nagoya.repo.nii.ac.jp/record/27059/files/paper_ishw2017_tanaka_v2.pdf
eng
https://doi.org/10.1088/1361-6587/aae2d7
“This Accepted Manuscript is available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period provided that all the terms of the licence are adhered to”
This is a peer-reviewed, un-copyedited version of an article accepted for publication/published in {Plasma Physics and Controlled Fusion}. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at {https://doi.org/10.1088/1361-6587/aae2d7}.