| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2023-03-06 |
| タイトル |
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タイトル |
Demonstration of reduced neoclassical energy transport in Wendelstein 7-X |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
BEIDLER, Craig
SMITH, H. M.
ALONSO, Juan Arturo
ANDREEVA, T.
BALDZUHN, J.
BEURSKENS, Marc
BORCHARDT, Matthias
BOZHENKOV, Sergey
BRUNNER, Kai Jakob
DAMM, Hannes
DREVLAK, M.
FORD, Oliver P.
FUCHERT, Golo
GEIGER, Joachim
HELANDER, P.
HERGENHAHN, Uwe
HIRSCH, M.
Höfel, Udo
KAZAKOV, Yevgen
KLEIBER, Ralf
KRYCHOWIAK, Maciej
KWAK, Sehyun
LANGENBERG, Andreas
LAQUA, Heinrich
NEUNER, U.
PABLANT, Novimir
PASCH, E.
PAVONE, Andrea
PEDERSEN, Thomas Sunn
RAHBARNIA, Kian
SCHILLING, Jonathan
SCOTT, Evan
STANGE, Torsten
SVENSSON, J.
THOMSEN, Henning
TURKIN, Yuriy
WARMER, Felix
WOLF, Robert
ZHANG, Daihong
the W7-X Team,
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| 著者ID |
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内容記述タイプ |
Other |
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内容記述 |
0000-0002-4395-239X |
| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Research on magnetic confinement of high-temperature plasmas has the ultimate goal of harnessing nuclear fusion for the production of electricity. Although the tokamak1 is the leading toroidal magnetic-confinement concept, it is not without shortcomings and the fusion community has therefore also pursued alternative concepts such as the stellarator. Unlike axisymmetric tokamaks, stellarators possess a three-dimensional (3D) magnetic field geometry. The availability of this additional dimension opens up an extensive configuration space for computational optimization of both the field geometry itself and the current-carrying coils that produce it. Such an optimization was undertaken in designing Wendelstein 7-X (W7-X)2, a large helical-axis advanced stellarator (HELIAS), which began operation in 2015 at Greifswald, Germany. A major drawback of 3D magnetic field geometry, however, is that it introduces a strong temperature dependence into the stellarator’s non-turbulent ‘neoclassical’ energy transport. Indeed, such energy losses will become prohibitive in high-temperature reactor plasmas unless a strong reduction of the geometrical factor associated with this transport can be achieved; such a reduction was therefore a principal goal of the design of W7-X. In spite of the modest heating power currently available, W7-X has already been able to achieve high-temperature plasma conditions during its 2017 and 2018 experimental campaigns, producing record values of the fusion triple product for such stellarator plasmas3,4. The triple product of plasma density, ion temperature and energy confinement time is used in fusion research as a figure of merit, as it must attain a certain threshold value before net-energy-producing operation of a reactor becomes possible1,5. Here we demonstrate that such record values provide evidence for reduced neoclassical energy transport in W7-X, as the plasma profiles that produced these results could not have been obtained in stellarators lacking a comparably high level of neoclassical optimization. |
| 書誌情報 |
Nature
巻 596,
p. 221-226,
発行日 2021-08-11
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| 書誌的事項 |
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A Publisher Correction to this article was published on 12 October 2021 / This article has been updated |
| 出版者 |
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出版者 |
Nature Research |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0028-0836 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00752384 |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1038/s41586-021-03687-w |
| 権利 |
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権利情報 |
© 2021, The Author(s) |
| 情報源 |
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関連名称 |
Beidler, C.D., Smith, H.M., Alonso, A. et al. Demonstration of reduced neoclassical energy transport in Wendelstein 7-X. Nature 596, 221–226 (2021). https://doi.org/10.1038/s41586-021-03687-w |
| 関連サイト |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1038/s41586-021-03687-w |
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関連名称 |
Publisher version |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
Nature_596_221–226 (2.7 MB)
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