Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System)

N. Ohyabu; A. Fujisawa; N. Ashikawa; P. DeVries; M. Emoto; H. Funaba; M. Goto; Y. Hamada; H. Iguchi; K. Ida; K. Itoh; M. Isobe; H. Idei; S. Inagaki; N. Inoue; K. Ikeda; S. Kado; S. Kubo; R. Kumazawa; K. Khlopenkov; O. Kaneko; K. Kawahata; A. Komori; T. Kobuchi; S. Lee; Y. Liang; T. Minami; J. Miyazawa; S. Masuzaki; K. Matsuoka; T. Morisaki; S. Morita; S. Murakami; T. Mutoh; S. Muto; K. Narihara; Y. Nagayama; Y. Nakamura; H. Nakanishi; K. Nishimura; S. Nishimura; N. Noda; I. Nomura; T. Notake; S. Okamura; S. Ohdachi; K. Ohkubo; Y. Oka; M. Osakabe; T. Ozaki; B. J. Peterson; R. O. Pavlichenko; A. Sagara; S. Sakakibara; R. Sakamoto; M. Sasao; K. Sato; H. Sanuki; K. Saito; M. Sato; T. Seki; A. Shimizu; T. Shimozuma; M. Shoji; H. Suzuki; S. Sudo; H. Sasao; Y. Takeiri; K. Tanaka; K. Toi; T. Tokuzawa; K. Tsumori; K. Tsuzuki; M. Takechi; N. Tamura; Y. Torii; I. Yamada; H. Yamada; S. Yamaguchi; K. Yamazaki; M. Yokoyama; Y. Yoshimura; S. Yamamoto; K. Y. Watanabe; T. Watanabe; T. Watari; O. Motojima; M. Fujiwara

doi:10.1063/1.874001

Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System)

N. Ohyabu, A. Fujisawa, N. Ashikawa, P. DeVries, M. Emoto, H. Funaba, M. Goto, Y. Hamada, H. Iguchi, K. Ida, K. Itoh, M. Isobe, H. Idei, S. Inagaki, N. Inoue, K. Ikeda, S. Kado, S. Kubo, R. Kumazawa, K. KhlopenkovO. Kaneko, K. Kawahata, A. Komori, T. Kobuchi, S. Lee, Y. Liang, T. Minami, J. Miyazawa, S. Masuzaki, K. Matsuoka, T. Morisaki, S. Morita, S. Murakami, T. Mutoh, S. Muto, K. Narihara, Y. Nagayama, Y. Nakamura, H. Nakanishi, K. Nishimura, S. Nishimura, N. Noda, I. Nomura, T. Notake, S. Okamura, S. Ohdachi, K. Ohkubo, Y. Oka, M. Osakabe, T. Ozaki, B. J. Peterson, R. O. Pavlichenko, A. Sagara, S. Sakakibara, R. Sakamoto, M. Sasao, K. Sato, H. Sanuki, K. Saito, M. Sato, T. Seki, A. Shimizu, T. Shimozuma, M. Shoji, H. Suzuki, S. Sudo, H. Sasao, Y. Takeiri, K. Tanaka, K. Toi, T. Tokuzawa, K. Tsumori, K. Tsuzuki, M. Takechi, N. Tamura, Y. Torii, I. Yamada, H. Yamada, S. Yamaguchi, K. Yamazaki, M. Yokoyama, Y. Yoshimura, S. Yamamoto, K. Y. Watanabe, T. Watanabe, T. Watari, O. Motojima, M. Fujiwara

Research output: Contribution to journal › Conference article › peer-review

11 Citations (Scopus)

Abstract

In the discharges of the Large Helical Device [O. Motojima et al., Proceedings of the 16th Conference on Fusion Energy, Montreal, 1996 (International Atomic Energy Agency, Vienna, 1997), Vol. 3, p. 437], a significant enhancement of the energy confinement has been achieved with an edge thermal transport barrier, which exhibits a sharp gradient at the edge. Key features associated with the barrier are quite different from those seen in tokamaks (i) almost no change in particle (including impurity) transport, (ii) a gradual formation of the barrier, (iii) a very high ratio of the edge temperature to the average temperature, (iv) no edge relaxation phenomenon. In the electron cyclotron heating (ECH) heated discharges in the Compact Helical System [K. Matsuoka et al., in Proceedings of the 12th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Nice, France, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 411], the internal electron transport barrier has been observed, which enhances the central electron temperature significantly. High shear of the radial electric field appears to suppress the turbulence in the core region and enhance the electron confinement there.

Original language	English
Pages (from-to)	1802-1808
Number of pages	7
Journal	Physics of Plasmas
Volume	7
Issue number	5 II
DOIs	https://doi.org/10.1063/1.874001
Publication status	Published - May 2000
Externally published	Yes
Event	41st Annual Meeting of the Division of Plasma Physics of the Ameircan Physical Society - Seattle, WA, United States Duration: Nov 15 1999 → Nov 19 1999

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Access to Document

10.1063/1.874001

Cite this

Ohyabu, N., Fujisawa, A., Ashikawa, N., DeVries, P., Emoto, M., Funaba, H., Goto, M., Hamada, Y., Iguchi, H., Ida, K., Itoh, K., Isobe, M., Idei, H., Inagaki, S., Inoue, N., Ikeda, K., Kado, S., Kubo, S., Kumazawa, R., ... Fujiwara, M. (2000). Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System). Physics of Plasmas, 7(5 II), 1802-1808. https://doi.org/10.1063/1.874001

Ohyabu, N, Fujisawa, A, Ashikawa, N, DeVries, P, Emoto, M, Funaba, H, Goto, M, Hamada, Y, Iguchi, H, Ida, K, Itoh, K, Isobe, M, Idei, H, Inagaki, S, Inoue, N, Ikeda, K, Kado, S, Kubo, S, Kumazawa, R, Khlopenkov, K, Kaneko, O, Kawahata, K, Komori, A, Kobuchi, T, Lee, S, Liang, Y, Minami, T, Miyazawa, J, Masuzaki, S, Matsuoka, K, Morisaki, T, Morita, S, Murakami, S, Mutoh, T, Muto, S, Narihara, K, Nagayama, Y, Nakamura, Y, Nakanishi, H, Nishimura, K, Nishimura, S, Noda, N, Nomura, I, Notake, T, Okamura, S, Ohdachi, S, Ohkubo, K, Oka, Y, Osakabe, M, Ozaki, T, Peterson, BJ, Pavlichenko, RO, Sagara, A, Sakakibara, S, Sakamoto, R, Sasao, M, Sato, K, Sanuki, H, Saito, K, Sato, M, Seki, T, Shimizu, A, Shimozuma, T, Shoji, M, Suzuki, H, Sudo, S, Sasao, H, Takeiri, Y, Tanaka, K, Toi, K, Tokuzawa, T, Tsumori, K, Tsuzuki, K, Takechi, M, Tamura, N, Torii, Y, Yamada, I, Yamada, H, Yamaguchi, S, Yamazaki, K, Yokoyama, M, Yoshimura, Y, Yamamoto, S, Watanabe, KY, Watanabe, T, Watari, T, Motojima, O & Fujiwara, M 2000, 'Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System)', Physics of Plasmas, vol. 7, no. 5 II, pp. 1802-1808. https://doi.org/10.1063/1.874001

@article{0fec57796e184a41baec1baff907572b,

title = "Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System)",

abstract = "In the discharges of the Large Helical Device [O. Motojima et al., Proceedings of the 16th Conference on Fusion Energy, Montreal, 1996 (International Atomic Energy Agency, Vienna, 1997), Vol. 3, p. 437], a significant enhancement of the energy confinement has been achieved with an edge thermal transport barrier, which exhibits a sharp gradient at the edge. Key features associated with the barrier are quite different from those seen in tokamaks (i) almost no change in particle (including impurity) transport, (ii) a gradual formation of the barrier, (iii) a very high ratio of the edge temperature to the average temperature, (iv) no edge relaxation phenomenon. In the electron cyclotron heating (ECH) heated discharges in the Compact Helical System [K. Matsuoka et al., in Proceedings of the 12th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Nice, France, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 411], the internal electron transport barrier has been observed, which enhances the central electron temperature significantly. High shear of the radial electric field appears to suppress the turbulence in the core region and enhance the electron confinement there.",

author = "N. Ohyabu and A. Fujisawa and N. Ashikawa and P. DeVries and M. Emoto and H. Funaba and M. Goto and Y. Hamada and H. Iguchi and K. Ida and K. Itoh and M. Isobe and H. Idei and S. Inagaki and N. Inoue and K. Ikeda and S. Kado and S. Kubo and R. Kumazawa and K. Khlopenkov and O. Kaneko and K. Kawahata and A. Komori and T. Kobuchi and S. Lee and Y. Liang and T. Minami and J. Miyazawa and S. Masuzaki and K. Matsuoka and T. Morisaki and S. Morita and S. Murakami and T. Mutoh and S. Muto and K. Narihara and Y. Nagayama and Y. Nakamura and H. Nakanishi and K. Nishimura and S. Nishimura and N. Noda and I. Nomura and T. Notake and S. Okamura and S. Ohdachi and K. Ohkubo and Y. Oka and M. Osakabe and T. Ozaki and Peterson, {B. J.} and Pavlichenko, {R. O.} and A. Sagara and S. Sakakibara and R. Sakamoto and M. Sasao and K. Sato and H. Sanuki and K. Saito and M. Sato and T. Seki and A. Shimizu and T. Shimozuma and M. Shoji and H. Suzuki and S. Sudo and H. Sasao and Y. Takeiri and K. Tanaka and K. Toi and T. Tokuzawa and K. Tsumori and K. Tsuzuki and M. Takechi and N. Tamura and Y. Torii and I. Yamada and H. Yamada and S. Yamaguchi and K. Yamazaki and M. Yokoyama and Y. Yoshimura and S. Yamamoto and Watanabe, {K. Y.} and T. Watanabe and T. Watari and O. Motojima and M. Fujiwara",

year = "2000",

month = may,

doi = "10.1063/1.874001",

language = "English",

volume = "7",

pages = "1802--1808",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics Publising LLC",

number = "5 II",

note = "41st Annual Meeting of the Division of Plasma Physics of the Ameircan Physical Society ; Conference date: 15-11-1999 Through 19-11-1999",

}

TY - JOUR

T1 - Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System)

AU - Ohyabu, N.

AU - Fujisawa, A.

AU - Ashikawa, N.

AU - DeVries, P.

AU - Emoto, M.

AU - Funaba, H.

AU - Goto, M.

AU - Hamada, Y.

AU - Iguchi, H.

AU - Ida, K.

AU - Itoh, K.

AU - Isobe, M.

AU - Idei, H.

AU - Inagaki, S.

AU - Inoue, N.

AU - Ikeda, K.

AU - Kado, S.

AU - Kubo, S.

AU - Kumazawa, R.

AU - Khlopenkov, K.

AU - Kaneko, O.

AU - Kawahata, K.

AU - Komori, A.

AU - Kobuchi, T.

AU - Lee, S.

AU - Liang, Y.

AU - Minami, T.

AU - Miyazawa, J.

AU - Masuzaki, S.

AU - Matsuoka, K.

AU - Morisaki, T.

AU - Morita, S.

AU - Murakami, S.

AU - Mutoh, T.

AU - Muto, S.

AU - Narihara, K.

AU - Nagayama, Y.

AU - Nakamura, Y.

AU - Nakanishi, H.

AU - Nishimura, K.

AU - Nishimura, S.

AU - Noda, N.

AU - Nomura, I.

AU - Notake, T.

AU - Okamura, S.

AU - Ohdachi, S.

AU - Ohkubo, K.

AU - Oka, Y.

AU - Osakabe, M.

AU - Ozaki, T.

AU - Peterson, B. J.

AU - Pavlichenko, R. O.

AU - Sagara, A.

AU - Sakakibara, S.

AU - Sakamoto, R.

AU - Sasao, M.

AU - Sato, K.

AU - Sanuki, H.

AU - Saito, K.

AU - Sato, M.

AU - Seki, T.

AU - Shimizu, A.

AU - Shimozuma, T.

AU - Shoji, M.

AU - Suzuki, H.

AU - Sudo, S.

AU - Sasao, H.

AU - Takeiri, Y.

AU - Tanaka, K.

AU - Toi, K.

AU - Tokuzawa, T.

AU - Tsumori, K.

AU - Tsuzuki, K.

AU - Takechi, M.

AU - Tamura, N.

AU - Torii, Y.

AU - Yamada, I.

AU - Yamada, H.

AU - Yamaguchi, S.

AU - Yamazaki, K.

AU - Yokoyama, M.

AU - Yoshimura, Y.

AU - Yamamoto, S.

AU - Watanabe, K. Y.

AU - Watanabe, T.

AU - Watari, T.

AU - Motojima, O.

AU - Fujiwara, M.

PY - 2000/5

Y1 - 2000/5

N2 - In the discharges of the Large Helical Device [O. Motojima et al., Proceedings of the 16th Conference on Fusion Energy, Montreal, 1996 (International Atomic Energy Agency, Vienna, 1997), Vol. 3, p. 437], a significant enhancement of the energy confinement has been achieved with an edge thermal transport barrier, which exhibits a sharp gradient at the edge. Key features associated with the barrier are quite different from those seen in tokamaks (i) almost no change in particle (including impurity) transport, (ii) a gradual formation of the barrier, (iii) a very high ratio of the edge temperature to the average temperature, (iv) no edge relaxation phenomenon. In the electron cyclotron heating (ECH) heated discharges in the Compact Helical System [K. Matsuoka et al., in Proceedings of the 12th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Nice, France, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 411], the internal electron transport barrier has been observed, which enhances the central electron temperature significantly. High shear of the radial electric field appears to suppress the turbulence in the core region and enhance the electron confinement there.

AB - In the discharges of the Large Helical Device [O. Motojima et al., Proceedings of the 16th Conference on Fusion Energy, Montreal, 1996 (International Atomic Energy Agency, Vienna, 1997), Vol. 3, p. 437], a significant enhancement of the energy confinement has been achieved with an edge thermal transport barrier, which exhibits a sharp gradient at the edge. Key features associated with the barrier are quite different from those seen in tokamaks (i) almost no change in particle (including impurity) transport, (ii) a gradual formation of the barrier, (iii) a very high ratio of the edge temperature to the average temperature, (iv) no edge relaxation phenomenon. In the electron cyclotron heating (ECH) heated discharges in the Compact Helical System [K. Matsuoka et al., in Proceedings of the 12th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Nice, France, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 411], the internal electron transport barrier has been observed, which enhances the central electron temperature significantly. High shear of the radial electric field appears to suppress the turbulence in the core region and enhance the electron confinement there.

UR - http://www.scopus.com/inward/record.url?scp=0000766464&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000766464&partnerID=8YFLogxK

U2 - 10.1063/1.874001

DO - 10.1063/1.874001

M3 - Conference article

AN - SCOPUS:0000766464

SN - 1070-664X

VL - 7

SP - 1802

EP - 1808

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 II

T2 - 41st Annual Meeting of the Division of Plasma Physics of the Ameircan Physical Society

Y2 - 15 November 1999 through 19 November 1999

ER -

Thermal transport barrier in heliotron-type devices (Large Helical Device and Compact Helical System)

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this