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

Power Exhaust and Particle Control

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34 Scopus citations

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
State	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

@article{18f7859c76ba4b16801bba17eae42d8d,

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",

language = "English",

volume = "47",

pages = "1265--1273",

journal = "Nuclear Fusion",

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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

N2 - 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.

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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SN - 0029-5515

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

Abstract

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