榊原 悟

ヘリカル研究部・高温プラズマ物理研究系・プラズマ揺動計測部門 教授

 

 [研究内容]

プラズマにおける電磁流体力学的平衡、安定性研究および高ベータ関連物理研究を進めています。ベータ値とはプラズマ圧力と磁気圧の比であり、弱い磁場で高い圧力のプラズマを維持する、すなわち高ベータプラズマの定常維持が経済性に優れた核融合炉において重要となります。しかしながら、ベータ値の上昇に伴う閉じ込め磁場構造の自発的な乱れや、プラズマ中に発生した擾乱の成長などがベータ値の上昇を阻害したり、プラズマの閉じ込め性能を劣化させたりします。本研究では、上記のような電磁流体的平衡および安定性について、実験と理論との対比を通じて物理特性を明らかにし、プラズマのさらなる高ベータ化を目指しています。

 

[受賞等]

平成24年度文部科学大臣表彰・科学技術賞

 


 

[論文リスト]

1-1 査読論文

1)        S. Sakakibara, Y. Narushima, Y. Takemura, M. Okamoto, K.Y.Watanabe, Y. Suzuki, S. Ohdachi, K. Ida, M. Yoshinuma, K. Tanaka, T. Tokuzawa, K. Narihara, I. Yamada, H. Yamada and the LHD Experiment Group

Response of MHD stability to resonant magnetic perturbation in the Large

Helical Device

Nuclear Fusion Vol.53 (2013) 043010.

2)        S. Sakakibara, Y. Suzuki, Y. Narushima, K.Y. Watanabe, Y. Takemura, S. Ohdachi, K. Ida, M. Yoshinuma, K. Narihara, I. Yamada, K. Tanaka, T. Tokuzawa, H. Yamada and LHD Experiment Group

Modification of Magnetic Field Structure of High Beta Plasmas with Perturbation Field in LHD

Plasma Physics and Controlled Fusion Vol.55 (2013) 014014.

3)        Y. Takemura, S. Sakakibara, Y. Narushima, M. Okamoto, K.Y. Watanabe, Y. Suzuki, S. Ohdachi, K. Ida, M. Yoshinuma, K. Tanaka, T. Tokuzawa, K. Narihara, I. Yamada, H. Yamada and the LHD Experiment Group

Mode locking phenomena observed near the stability boundary of the ideal interchange mode of LHD

Nuclear Fusion Vol.52 (2012) 102001.

4)        Y. Suzuki, S. Sakakibara, K.Y. Watanabe, Y. Narushima, S. Ohdachi, S. Yamamoto, H. Okamda, LHD experiment group

Study of Magnetic Island Using a 3D MHD Equilibrium Calculation Code

Plasma and Fusion Research Vol. 6 (2011) 2402134-1~5.

5)        S. Sakakibara, K. Y. Watanabe, S. Ohdachi, Y. Narushima, K. Toi, K. Tanaka, K. Narihara, K. Ida, T. Tokuzawa, K. Kawahata, H. Yamada, A. Komori, LHD Experiment Group

Study of MHD Stability in LHD

Fusion Science and Technology Vol.58 No.1 (2010) 176-185.

6)        S. Sakakibara, H. Yamada, LHD Experiment Group

Magnetic Measurements in LHD

Fusion Science and Technology Vol. 58 No.1 (2010) 471-481.

7)        A. Weller, K.Y. Watanabe, S. Sakakibara, A. Dinklage, H. Funaba, J. Geiger, J.H. Harris, S. Ohdachi, R. Preuss, Y. Suzuki, A. Werner, H. Yamada, M.C. Zarnstorff, the W7-X Team and the LHD Experimental Group

International Stellarator/Heliotron Database progress on high-beta confinement and operational boundaries

Nuclear Fusion Vol.49 No.6 (2009) 065016-1~13.

8)        S. Sakakibara, K.Y. Watanabe, Y. Suzuki, Y. Narushima, S. Ohdachi, N. Nakajima, F. Watanabe, L. Garcia, A. Weller, K. Toi, I. Yamada, K. Tanaka, T. Tokuzawa, K. Ida, H. Yamada, A. Komori, O. Motojima and the LHD Experimental Group

MHD study of the reactor-relevant high-beta regime in the Large Helical Device

Plasma Physics and Controlled Fusion Vol.50 No.12 (2008) 124014-1~10.

9)        S. Sakakibara, K. Y. Watanabe, H. Yamada, Y. Narushima, T. Yamaguchi, K. Toi, S. Ohdachi, A. Weller, K. Tanaka, K. Narihara, K. Ida, T. Tokuzawa, K. Kawahata, A. Komori, LHD Experimental Group

Recent Progress of MHD Study in High-Beta Plasmas of LHD

Fusion Science and Technology Vol.50 No.2 (2006) 177-185.

10)    S. Sakakibara, K.Y. Watanabe, H. Yamada, Y. Narushima, K. Toi, S. Ohdachi, T. Yamaguchi, K. Narihara, K. Tanaka, T. Tokuzawa, K. Ida, O. Kaneko, K. Kawahata, A. Komori, , LHD Experimental Group

Effects of Resonant Magnetic Fluctuations on Plasma Confinement in Current Carrying high-β Plasmas of LHD

Plasma and Fusion Research Vol.1 (2006) 003-1~7.

11)    S. Sakakibara, K.Y. Watanabe, H. Yamada, Y. Narushima, T. Yamaguchi, K. Toi, S. Ohdachi, K. Tanaka, T. Tokuzawa, K. Narihara, K. Kawahata, A. Komori, LHD Experimental Group

Onset of Resistive Interchange Mode in the Large Helical Device

Plasma and Fusion Research Vol.1 (2006) 049-1~5.

12)    A. Weller, S. Sakakibara, K.Y. Watanabe, K. Toi, J. Geiger, M.C. Zarnstorff, S.R. Hudson, A. Reiman, A. Werner, C.Nuhrenberg, S. Ohdachi, Y. Suzuki, H. Yamada, W7-AS Team and LHD Team

       “Significance of MHD Effects in Stellarator Confinement

       Fusion Science and Technology Vol.50 (2006) 158-170.

13)    K.Y. Watanabe, S. Sakakibara, Y. Narushima, H. Funaba, K. Narihara, K. Tanaka, T. Yamaguchi, K. Toi, S. Ohdachi, O. Kaneko, H. Yamada, Y. Suzuki, W.A. Cooper, S. Murakami, N. Nakajima, I. Yamada, K. Kawahata, T. Tokuzawa, A. Komori and LHD experimental group

       “Effects of global MHD instability on operational high beta-regime in LHD

       Nuclear Fusion Vol.45 (2005) 1247–1254.

14)    A. Komori, S. Sakakibara, T. Morisaki, K. Y. Watanabe, Y. Narushima, K. Toi, S. Ohdachi, S. Masuzaki, M. Kobayashi, M. Shoji, N. Ohyabu, K. Ida, K. Tanaka, K. Kawahata, K. Narihara, S. Morita, B. J. Peterson, R. Sakamoto, H. Yamada, K. Ikeda, O. Kaneko, M. Kobayashi, S. Kubo, J. Miyazawa, K. Nagaoka, H. Nakanishi, K. Ohkubo, Y. Oka, M. Osakabe, T. Shimozuma, Y. Takeiri, K. Tsumori, I. Yamada, Y. Yoshimura, M. Yoshinuma, and O. Motojima

       “Characteristics of confinement and stability in large helical device edge plasmas

       Physics of Plasmas Vol.12 (2005) 056122-1~8.

15)    K.Y. Watanabe, S. Sakakibara, H. Sasao, M. Yakovlev, K. Nishimura, S. Murakami, N. Nakajima, H. Yamada, K. Narihara, I. Yamada, K. Tanaka, K. Kawahata, T. Tokuzawa, K. Ida, S. Morita, O. Kaneko, K. Tsumori, K. Ikeda, Y. Narushima, T. Morisaki, A. Komori

        “Study of Time Evolution of Toroidal Current in LHD

       Journal of Plasma and Fusion Research, SERIES 5 (2003) pp.124-130.

16)    S. Sakakibara, H. Yamada, K.Y. Watanabe, Y. Narushima, K. Toi, S. Ohdachi, S. Yamamoto, K. Narihara, K. Tanaka, A. Komori, O. Kaneko

        “Effect of MHD Activities on Pressure Profile in High-Beta Plasmas of LHD

       Plasma Physics and Controlled Fusion, Vol.44, No.5A (2002) pp.A217-A223.

17)    S. Sakakibara, H. Yamada, K.Y. Watanabe, Y. Narushima, K. Toi, S. Ohdachi, M. Takechi, S. Yamamoto, K. Narihara, K. Tanaka, N. Ashikawa, P. deVries, M. Emoto, H. Funaba, M. Goto, K. Ida, H. Idei, K. Ikeda, S. Inagaki, N. Inoue, M. Isobe, S. Kado, O. Kaneko, K. Kawahata, K. Khlopenkov, T. Kobuchi, A. Komori, S. Kubo, R. Kumazawa, Y. Liang, S. Masuzaki, T. Minami, J. Miyazawa, T. Morisaki, S. Morita, S. Murakami, S. Muto, T. Mutoh, Y. Nagayama, Y. Nakamura, H. Nakanishi, K. Nishimura, N. Noda, T. Notake, N. Ohyabu, Y. Oka, M. Osakabe, T. Ozaki, R.O. Pavlichenko, B.J. Peterson, A. Sagara, K. Saito, R. Sakamoto, H. Sasao, M. Sasao, K. Sato, M. Sato, T. Seki, T. Shimozuma, M. Shoji, H. Suzuki, Y. Takeiri, N. Tamura, T. Tokuzawa, Y. Torii, K. Tsumori, I. Yamada, S. Yamaguchi, M. Yokoyama, Y. Yoshimura, T. Watari, N. Nakajima, K. Ichiguchi, H. Takahashi, A.W. Cooper, K. Yamazaki, O. Motojima, Y. Hamada, M. Fujiwara

       “MHD Characteristics in the High Beta Regime of the Large Helical Device”

       Nuclear Fusion, Vol.41, No.9 (2001) pp.1177-1184.

18)    H. Takahashi, S. Sakakibara, Y. Kubota, H. Yamada

        “Magnetic Probe Construction by Thick-Film Technology

       Review of Scientific Instruments Vol.72, No.8 (2001) pp.3249-3259.

19)    S. Sakakibara, K.Y. Watanabe, H. Yamada, S. Murakami, K. Narihara, K. Tanaka, K. Ida, S. Kado, I. Yamada, B.J. Peterson, A. Komori, S. Kubo, O. Motojima

       “Study of Toroidal Currents in LHD and Its Application to Equilibrium Control

       Journal of Plasma and Fusion Research SERIES, Vol.3 (2000) pp.109-112.

20)    T. Morisaki, S. Sakakibara, K.Y. Watanabe, H. Yamada, S. Masuzaki, N. Ohyabu, A. Komori, K. Yamazaki, O. Motojima

       “Characteristics of Edge Magnetic Field Structure in LHD Heliotron

       Contributions to Plasma Physics Vol.40, No.3-4 (2000) 266-270.

21)    S. Sakakibara, H. Yamada, K.Y. Watanabe, K. Yamazaki, O. Motojima

Role of Magnetic Measurements for LHD Equilibrium Database

Journal of Plasma and Fusion Research SERIES, Volume 1 (1997), pp.386-389.

22)    S. Sakakibara, H. Yamada, K. Yamazaki, K.Y. Watanabe, O. Motojima

Magnetic Diagnostics in the Large Helical Device

Fusion Engineering and Design Vol.34-35 (1997) pp. 707-709.

23)    S. Sakakibara, H. Yamada, K. Toi, A. Ejiri, A. Ando, H. Iguchi, K. Matsuoka, S. Morita, O. Motojima, K. Nishimura, S. Okamura, K. Tanaka

Magnetic Configuration Effect on MHD Modes in NBI Heated Plasmas in CHS

Transactions of Fusion Technology Vol.27 (1995) p231-234

24)    S. Sakakibara, H. Yamada, K. Toi, A. Ejiri, A. Ando, H. Iguchi, K. Matsuoka, S. Morita, O. Motojima, K. Nishimura, S. Okamura, K. Tanaka

Effect of Plasma Current on Magnetohydrodynamic Modes in Neutral Beam Heated Plasmas in Compact Helical System

Japanese Journal of Applied Physics Vol.34, Part 2, No.2B (1995), pp.252-255.

25)    S. Sakakibara, H. Yamada, A. Ejiri, K. Ida, K. Matsuoka, T. Morisaki, S. Morita, O. Motojima, K. Nishimura, S. Okamura, C. Takahashi, K. Toi, K. Watanabe

Experimental Observation of Magnetic Fluctuation in NBI Heated Plasmas in CHS Heliotron/Torsatron

Journal of the Physical Society of Japan Vol.63, No.12 (1994) pp.4406-4421.

 

1-2  国際会議における発表

1)        S. Sakakibara, Y. Narushima, Y. Takemura, M. Okamoto, K.Y.Watanabe, Y. Suzuki, S. Ohdachi, K. Ida, M. Yoshinuma, K. Tanaka, T. Tokuzawa, K. Narihara, I. Yamada, H. Yamada and the LHD Experiment Group

Response of MHD stability to resonant magnetic perturbation in the Large

Helical Device

24th IAEA Fusion Energy Conference (8-13 Oct.,2012, San Diego, California, USA) EX/P4-30.

2)        S. Sakakibara, Y. Suzuki, K. Ida, K. Kamiya, K.Y. Watanabe, Y. Narushima, Y. Takemura, K. Toi, S. Ohdachi, M. Yoshinuma, K. Tanaka, T. Tokuzawa, I. Yamada, K. Narihara, H. Yamada, A. Komori and LHD Experiment Group

Modification of magnetic field structure of high beta plasmas with perturbation field in LHD

18th International Stellarator/Heliotron Workshop & 10th Asia Pacific Plasma Theory Conference (29 Jan.-3 Feb.,2012, Canberra, Australia) S12.1Eq2. (招待講演)

3)        S. Sakakibara, K.Y.Watanabe, Y.Suzuki, S.Ohdachi, Y.Narushima, H.Funaba, Y.Takemura, K.Toi, H.Funaba, K.Ida, I.Yamada, K.Narihara, K.Tanaka, T.Tokuzawa, H.Yamada, A.Komori and LHD Experiment Group

Effect of external magnetic perturbation on MHD characteristics in the Large Helical Device

15th International Congress of Plasma Physics (ICPP2010) & 13th Latin American Workshop (Santiago, Chile, 8-13 Aug.,2010) (招待講演)

4)        S. Sakakibara, S. Ohdachi, K.Y. Watanabe, Y. Suzuki, H. Funaba, Y. Narushima, K. Ida , H. Chikaraishi, K. Toi, I. Yamada, K. Narihara, K.Tanaka, T. Tokuzawa, K. Kawahata, H. Yamada, A. Komori and LHD Experiment Group

Exploration of optimal high-beta operation regime by magnetic axis swing in the Large Helical Device

23rd IAEA Fusion Energy Conference (Daejon, Korea, 11-16 Oct., 2010) EXS/P5-13.

5)        S. Sakakibara, K.Y. Watanabe, S. Ohdachi, Y. Suzuki, Y. Narushima, K. Toi, I. Yamada, K. Tanaka, K. Ida, H. Yamada, A. Komori and LHD Experiment Group

Study of MHD Characteristics by Magnetic Axis Control in high-beta plasmas of LHD

17th International Stellarator/Heliotron Workshop (New Jersey, USA, 12-16 Oct.,2009) P03-08.

6)        S. Sakakibara, K.Y. Watanabe, Y. Suzuki, Y. Narushima, S. Ohdachi, N. Nakajima, F. Watanabe, L. Garcia, A. Weller, K. Toi, I. Yamada, K. Tanaka, T. Tokuzawa, K. Ida, H. Yamada, A. Komori, O. Motojima and LHD Experimental Group

Study of Reactor-Relevant High-Beta Regime in the Large Helical Device

35th EPS Conference on Plasma Physics (Hersonissos, Greece, 9 - 13 June 2008) ECA Vol.32D, I2.022 (2008)(招待講演)

7)        S. Sakakibara, K.Y. Watanabe, H. Yamada, Y. Narushima, S. Ohdachi, K. Toi, K. Narihara, I. Yamada, K. Tanaka, T. Tokuzawa, K. Ida, K. Kawahata, A. Komori and LHD Experimental Group

Effect of Magnetic Shear and Resonant Magnetic Field on low-m mode in LHD

33th EPS Conference on Plasma Physics (Roma, Italy, June 19 - 23, 2006) ECA Vol.30I, P-4.113 (2006).

8)        S. Sakakibara, K.Y. Watanabe, H. Yamada, Y. Narushima, T. Yamaguchi, S. Ohdachi, K. Toi, K. Narihara, I. Yamada, K. Tanaka, T. Tokuzawa, K. Ida, K. Kawahata, A. Komori, O. Motojima, LHD Experimental Group

Stability in High-Beta Plasmas of LHD

21st IAEA Conference, Fusion Energy 2006 (Chengdu,China, 16-21 October 2006) EX/7-5.(口頭発表)

9)        S.Sakakibara, K.Y.Watanabe, H.Yamada, Y.Narushima, T.Yamaguchi, K.Toi, S.Ohdachi, A.Weller, K.Tanaka, K.Narihara, K.Ida, T.Tokuzawa, K.Kawahata, A.Komori and LHD Experimental Group

Recent Progress of MHD Study in High-β Plasmas of LHD

15th International Stellarator Workshop (Madrid, Spain, 3-7 Mar.,2005) IT-07. (招待講演)

10)    S. Sakakibara, K.Y. Watanabe, H. Funaba, H. Yamada, Y. Narushima, T. Yamaguchi, S. Ohdachi, K. Narihara, I. Yamada, K. Tanaka, K. Kawahata, O. Kaneko, A. Komori, O. Motojima and LHD Experimental Group

MHD Activities in high-beta regime of LHD

31st EPS Conference on Plasma Physics (London, UK, 28th June - 2nd July, 2004) ECA Vol.28G, O-4.01 (2004). (口頭発表)

11)    S. Sakakibara, K.Y. Watanabe, H. Yamada, Y. Narushima, K. Toi, S. Ohdachi, S. Yamamoto, K. Narihara, K. Tanaka, K. Ida

MHD Instabilities in High-beta Plasmas of LHD

The 11th Proc. International Congress of Plasma Physics (2002, Sydney) AIP Conference Proceedings Vol. 669 pp. 203-206.

12)    S. Sakakibara, H. Yamada, K.Y. Watanabe, Y. Narushima, K. Toi, S. Ohdachi, M. Takechi, S. Yamamoto, K. Narihara, K. Tanaka, N. Ashikawa, P. de Vries, M. Emoto, H. Funaba, M. Goto, K. Ida, H. Idei, K. Ikeda, S. Inagaki, N. Inoue, M. Isobe, S. Kado, O. Kaneko, K. Kawahata, K. Khlopenkov, A. Komori, S. Kubo, R. Kumazawa, S. Masuzaki, T. Minami, J. Miyazawa, T. Morisaki, S. Morita, S. Murakami, S. Muto, T. Mutoh, Y. Nagayama, Y. Nakamura, H. Nakanishi, K. Nishimura, N. Noda, T. Notake, T. Kobuchi, Y. Liang, N. Ohyabu, Y. Oka, M. Osakabe, T. Ozaki, R.O. Pavlichenko, B.J. Peterson, A. Sagara, K. Saito, R. Sakamoto, H. Sasao, M. Sasao, K. Sato, M. Sato, T. Seki, T. Shimozuma, M. Shoji, H. Suzuki, Y. Takeiri, N. Tamura, T. Tokuzawa, Y. Torii, K. Tsumori, I. Yamada, S. Yamaguchi, M. Yokoyama, Y. Yoshimura, T. Watari, N. Nakajima, K. Ichiguchi, H. Takahashi, W.A. Cooper, K. Yamazaki, O. Motojima, Y. Hamada, M. Fujiwara

MHD Characteristics in High-Beta Regime of the Large Helical Device

18th Conference Proceedings of Fusion Energy 2000 (Sorrento, Italy 4-10 October 2000) IAEA (2001) EXP3/12 \PDF\EXP3_12.PDF.

13)    S. Sakakibara, H. Yamada, K.Y. Watanabe, K. Narihara, K. Tanaka, K. Ida, S.Kado, T. Minami, K. Toi, S. Ohdachi, B.J.Peterson, A. Komori, O. Kaneko, S. Kubo, O. Motojima and LHD Experimental Group

Experimental Study of Finite-beta Effects and MHD Instabilities in LHD

12th International Stellarator Workshop (Madison, Sep.27-Oct.1, 1999) (口頭発表)

14)    S. Sakakibara, H. Yamada, K.Y. Watanabe, K. Yamazaki, K. Nishimura, O. Motojima

Preparative Study of Simulated Magnetic Measurements in Large Heical Device” 

24th European Physical Society Conference on Controlled Fusion and Plasma Physics (Berchtesgarden, 1997) Vol.21A, Part II pp.797-800.

15)    S. Sakakibara, H. Yamada, K.Y. Watanabe, K. Yamazaki, O. Motojima

Role of Magnetic Measurements for LHD Equilibrium Database

Journal of Plasma and Fusion Research SERIES, Volume 1 (Proceedings of Joint Conference of 11th International Stellarator Conference and 8th International Toki Conference on Plasma Physics and Controlled Nuclear Fusion), 1997, pp.386-389.

16)    S. Sakakibara, H. Yamada, K. Yamazaki, K.Y. Watanabe, K. Nishimura, O. Motojima

Engineering Design and Physical Analysis of Magnetics Measurements in Large Helical Device

1996 International Conference on Plasma Physics, Vol.2, pp.1430-1433.

17)    S. Sakakibara, H. Yamada, K. Toi, A. Ejiri, K. Ida, H. Iguchi, K. Matsuoka, T. Minami, T. Morisaki, O. Motojima, K. Narihara, S. Okamura, K. Tanaka, J. Xu, I. Yamada, K. Watanabe

Magnetic Configuration Effect on MHD Modes in NBI Heated Pasmas in CHS

6th International Toki Conference on Plasma Physics and Controlled Fusion Research for Advanced Concepts in Magnetic Fusion (29 November . 2 December, 1994), Transaction of  Fusion Technology, Vol.27 (1995) pp.231-234.

18)    S. Sakakibara, H. Yamada, O. Motojima

Experimental Study of Magnetic Fluctuations in a Low-Aspect-Ratio Heliotron CHS

Bulletin of the American Physical Society (Program of the 1993 Annual Meeting of the APS Division of Plasma Physics, St.Louis, 1993) Vol.38 (1993) pp.2021-2022.

1-3  その他の印刷物

1)        榊原 悟、栗原研一

最近の磁気計測事情

プラズマ・核融合学会誌 805号、20045月、pp.364-371.

2)        榊原 悟、渡邊清政

データ分析・グラフ作成ソフトウエア Origin

プラズマ・核融合学会誌 817号、20057月、pp.563-565.

3)      柳生純一、笹島唯之、三代康彦、榊原 悟、川俣陽一

電磁気検出器の開発 積層型電磁気プローブのJT-60Uへの適用とその結果-

JAEA-Technology, 2007-015, (2007) pp 1-27.

4)        三浦英昭、榊原 悟

磁場閉じ込め核融合における電磁流体力学

日本流体力学会誌 273, 20086月、pp.209-216