Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa

S. Okamura; K. Matsuoka; S. Nishimura; M. Isobe; C. Suzuki; A. Shimuzu; K. Ida; A. Fujisawa; S. Murakami; M. Yokoyama; K. Itoh; T. Hayashi; N. Nakajima; H. Sugama; M. Wakatani; Y. Nakamura; W. Anthony Cooper

doi:10.1088/0029-5515/44/5/001

Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa

S. Okamura, K. Matsuoka, S. Nishimura, M. Isobe, C. Suzuki, A. Shimuzu, K. Ida, A. Fujisawa, S. Murakami, M. Yokoyama, K. Itoh, T. Hayashi, N. Nakajima, H. Sugama, M. Wakatani, Y. Nakamura, W. Anthony Cooper

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14 Citations (Scopus)

Abstract

A low aspect ratio stellarator CHS-qa with a quasi-axisymmetric configuration has been designed at NIFS, whose main objective is the experimental study of confinement improvement. The high beta equilibrium was obtained with the HINT code which does not require the assumption of nested magnetic surfaces. The equilibria with bootstrap current were calculated using the SPBSC code and their global MHD stability was evaluated with the TERPSICHORE code. The boundary structure of the magnetic field was examined to scope divertor options. A new method of calculating the neoclassical transport properties was developed for toroidal configurations with very small non-axisymmetry. The control knobs of the configuration properties are proposed for the study of improved confinement.

Original language	English
Pages (from-to)	575-581
Number of pages	7
Journal	Nuclear Fusion
Volume	44
Issue number	5
DOIs	https://doi.org/10.1088/0029-5515/44/5/001
Publication status	Published - May 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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Okamura, S., Matsuoka, K., Nishimura, S., Isobe, M., Suzuki, C., Shimuzu, A., Ida, K., Fujisawa, A., Murakami, S., Yokoyama, M., Itoh, K., Hayashi, T., Nakajima, N., Sugama, H., Wakatani, M., Nakamura, Y., & Cooper, W. A. (2004). Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa. Nuclear Fusion, 44(5), 575-581. https://doi.org/10.1088/0029-5515/44/5/001

Okamura, S, Matsuoka, K, Nishimura, S, Isobe, M, Suzuki, C, Shimuzu, A, Ida, K, Fujisawa, A, Murakami, S, Yokoyama, M, Itoh, K, Hayashi, T, Nakajima, N, Sugama, H, Wakatani, M, Nakamura, Y & Cooper, WA 2004, 'Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa', Nuclear Fusion, vol. 44, no. 5, pp. 575-581. https://doi.org/10.1088/0029-5515/44/5/001

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abstract = "A low aspect ratio stellarator CHS-qa with a quasi-axisymmetric configuration has been designed at NIFS, whose main objective is the experimental study of confinement improvement. The high beta equilibrium was obtained with the HINT code which does not require the assumption of nested magnetic surfaces. The equilibria with bootstrap current were calculated using the SPBSC code and their global MHD stability was evaluated with the TERPSICHORE code. The boundary structure of the magnetic field was examined to scope divertor options. A new method of calculating the neoclassical transport properties was developed for toroidal configurations with very small non-axisymmetry. The control knobs of the configuration properties are proposed for the study of improved confinement.",

author = "S. Okamura and K. Matsuoka and S. Nishimura and M. Isobe and C. Suzuki and A. Shimuzu and K. Ida and A. Fujisawa and S. Murakami and M. Yokoyama and K. Itoh and T. Hayashi and N. Nakajima and H. Sugama and M. Wakatani and Y. Nakamura and Cooper, {W. Anthony}",

year = "2004",

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T1 - Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa

AU - Okamura, S.

AU - Matsuoka, K.

AU - Nishimura, S.

AU - Isobe, M.

AU - Suzuki, C.

AU - Shimuzu, A.

AU - Ida, K.

AU - Fujisawa, A.

AU - Murakami, S.

AU - Yokoyama, M.

AU - Itoh, K.

AU - Hayashi, T.

AU - Nakajima, N.

AU - Sugama, H.

AU - Wakatani, M.

AU - Nakamura, Y.

AU - Cooper, W. Anthony

PY - 2004/5

Y1 - 2004/5

N2 - A low aspect ratio stellarator CHS-qa with a quasi-axisymmetric configuration has been designed at NIFS, whose main objective is the experimental study of confinement improvement. The high beta equilibrium was obtained with the HINT code which does not require the assumption of nested magnetic surfaces. The equilibria with bootstrap current were calculated using the SPBSC code and their global MHD stability was evaluated with the TERPSICHORE code. The boundary structure of the magnetic field was examined to scope divertor options. A new method of calculating the neoclassical transport properties was developed for toroidal configurations with very small non-axisymmetry. The control knobs of the configuration properties are proposed for the study of improved confinement.

AB - A low aspect ratio stellarator CHS-qa with a quasi-axisymmetric configuration has been designed at NIFS, whose main objective is the experimental study of confinement improvement. The high beta equilibrium was obtained with the HINT code which does not require the assumption of nested magnetic surfaces. The equilibria with bootstrap current were calculated using the SPBSC code and their global MHD stability was evaluated with the TERPSICHORE code. The boundary structure of the magnetic field was examined to scope divertor options. A new method of calculating the neoclassical transport properties was developed for toroidal configurations with very small non-axisymmetry. The control knobs of the configuration properties are proposed for the study of improved confinement.

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EP - 581

JO - Nuclear Fusion

JF - Nuclear Fusion

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ER -

Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa

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