Investigation of dust shielding effect of intrinsic ergodic magnetic field line structures in the peripheral plasma in the large helical device
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抄録
0000-0003-0655-7347
Recent long pulse discharges in the large helical device (LHD) have been interrupted by radiation collapse induced by the emission of dust from the surface of the vacuum vessel and the divertor region. The dust shielding effect by intrinsic ergodic magnetic field line structures (ergodic layer) formed around the main plasma confinement region is investigated using a three-dimensional peripheral plasma fluid code (EMC3-EIRENE) coupled with a dust transport simulation code (DUSTT). Simulations performed in three different magnetic configurations with narrow, medium, and wide ergodic layers show that the wide ergodic layer is not always effective in shielding the main plasma from the dust emission. Optimum operational regimes for controlling the influence of the dust emission on the sustainment of plasma discharges are found by investigating the impurity ion content in the peripheral plasma for various plasma heating powers and plasma densities in the three magnetic configurations.
収録刊行物
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- Contributions to Plasma Physics
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Contributions to Plasma Physics 58 (6-8), 616-621, 2018
Wiley
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詳細情報 詳細情報について
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- CRID
- 1050853487355243904
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- NII論文ID
- 120007180013
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- NII書誌ID
- AA10760174
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- ISSN
- 08631042
- 15213986
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- HANDLE
- 10655/00012846
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- Web Site
- https://nifs-repository.repo.nii.ac.jp/records/10877
- https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fctpp.201700125
- https://onlinelibrary.wiley.com/doi/pdf/10.1002/ctpp.201700125
- https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ctpp.201700125
- https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/ctpp.201700125
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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