Physical model assessment of the energy confinement time scaling in stellarators

A. Dinklage; H. Maaberg; R. Preuss; Yu A. Turkin; H. Yamada; E. Ascasibar; C. D. Beidler; H. Funaba; J. H. Harris; A. Kus; S. Murakami; S. Okamura; F. Sano; U. Stroth; Y. Suzuki; J. Talmadge; V. Tribaldos; K. Y. Watanabe; A. Werner; A. Weller; M. Yokoyama

doi:10.1088/0029-5515/47/9/025

Physical model assessment of the energy confinement time scaling in stellarators

A. Dinklage^*, H. Maaberg, R. Preuss, Yu A. Turkin, H. Yamada, E. Ascasibar, C. D. Beidler, H. Funaba, J. H. Harris, A. Kus, S. Murakami, S. Okamura, F. Sano, U. Stroth, Y. Suzuki, J. Talmadge, V. Tribaldos, K. Y. Watanabe, A. Werner, A. WellerM. Yokoyama

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

The International Stellarator Confinement Database (ISCDB) is a joint effort of the helical device community. It is publicly available at http://www.ipp.mpg.de/ISS and http://iscdb.nifs.ac.jp. The validity of physics models is investigated employing ISCDB data. Bayesian model comparison shows differences in the confinement scaling of data subgroups. Theory-based assessment of pure neoclassical transport regimes, however, indicates scalability which is supported by experimental results in specific W7-AS scenarios. Therefore, neoclassical simulations are employed for predictive purposes in W7-X, accounting for effects due to power deposition, plasma profiles and the ambipolar radial electric field. Neoclassical case studies for W7-X are presented as examples for the neoclassical predictions to be considered as an upper limit of plasma performance.

Original language	English
Pages (from-to)	1265-1273
Number of pages	9
Journal	Nuclear Fusion
Volume	47
Issue number	9
DOIs	https://doi.org/10.1088/0029-5515/47/9/025
Publication status	Published - 2007

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Dinklage, A., Maaberg, H., Preuss, R., Turkin, Y. A., Yamada, H., Ascasibar, E., Beidler, C. D., Funaba, H., Harris, J. H., Kus, A., Murakami, S., Okamura, S., Sano, F., Stroth, U., Suzuki, Y., Talmadge, J., Tribaldos, V., Watanabe, K. Y., Werner, A., ... Yokoyama, M. (2007). Physical model assessment of the energy confinement time scaling in stellarators. Nuclear Fusion, 47(9), 1265-1273. https://doi.org/10.1088/0029-5515/47/9/025

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title = "Physical model assessment of the energy confinement time scaling in stellarators",

abstract = "The International Stellarator Confinement Database (ISCDB) is a joint effort of the helical device community. It is publicly available at http://www.ipp.mpg.de/ISS and http://iscdb.nifs.ac.jp. The validity of physics models is investigated employing ISCDB data. Bayesian model comparison shows differences in the confinement scaling of data subgroups. Theory-based assessment of pure neoclassical transport regimes, however, indicates scalability which is supported by experimental results in specific W7-AS scenarios. Therefore, neoclassical simulations are employed for predictive purposes in W7-X, accounting for effects due to power deposition, plasma profiles and the ambipolar radial electric field. Neoclassical case studies for W7-X are presented as examples for the neoclassical predictions to be considered as an upper limit of plasma performance.",

author = "A. Dinklage and H. Maaberg and R. Preuss and Turkin, {Yu A.} and H. Yamada and E. Ascasibar and Beidler, {C. D.} and H. Funaba and Harris, {J. H.} and A. Kus and S. Murakami and S. Okamura and F. Sano and U. Stroth and Y. Suzuki and J. Talmadge and V. Tribaldos and Watanabe, {K. Y.} and A. Werner and A. Weller and M. Yokoyama",

year = "2007",

doi = "10.1088/0029-5515/47/9/025",

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Dinklage, A, Maaberg, H, Preuss, R, Turkin, YA, Yamada, H, Ascasibar, E, Beidler, CD, Funaba, H, Harris, JH, Kus, A, Murakami, S, Okamura, S, Sano, F, Stroth, U, Suzuki, Y, Talmadge, J, Tribaldos, V, Watanabe, KY, Werner, A, Weller, A & Yokoyama, M 2007, 'Physical model assessment of the energy confinement time scaling in stellarators', Nuclear Fusion, vol. 47, no. 9, pp. 1265-1273. https://doi.org/10.1088/0029-5515/47/9/025

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T1 - Physical model assessment of the energy confinement time scaling in stellarators

AU - Dinklage, A.

AU - Maaberg, H.

AU - Preuss, R.

AU - Turkin, Yu A.

AU - Yamada, H.

AU - Ascasibar, E.

AU - Beidler, C. D.

AU - Funaba, H.

AU - Harris, J. H.

AU - Kus, A.

AU - Murakami, S.

AU - Okamura, S.

AU - Sano, F.

AU - Stroth, U.

AU - Suzuki, Y.

AU - Talmadge, J.

AU - Tribaldos, V.

AU - Watanabe, K. Y.

AU - Werner, A.

AU - Weller, A.

AU - Yokoyama, M.

PY - 2007

Y1 - 2007

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AB - The International Stellarator Confinement Database (ISCDB) is a joint effort of the helical device community. It is publicly available at http://www.ipp.mpg.de/ISS and http://iscdb.nifs.ac.jp. The validity of physics models is investigated employing ISCDB data. Bayesian model comparison shows differences in the confinement scaling of data subgroups. Theory-based assessment of pure neoclassical transport regimes, however, indicates scalability which is supported by experimental results in specific W7-AS scenarios. Therefore, neoclassical simulations are employed for predictive purposes in W7-X, accounting for effects due to power deposition, plasma profiles and the ambipolar radial electric field. Neoclassical case studies for W7-X are presented as examples for the neoclassical predictions to be considered as an upper limit of plasma performance.

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DO - 10.1088/0029-5515/47/9/025

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VL - 47

SP - 1265

EP - 1273

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 9

ER -

Physical model assessment of the energy confinement time scaling in stellarators

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