Nuclear Fusion (Jan 2024)

Overview of Large Helical Device experiments of basic plasma physics for solving crucial issues in reaching burning plasma conditions

  • K. Ida,
  • M. Yoshinuma,
  • M. Kobayashi,
  • T. Kobayashi,
  • N. Kenmochi,
  • F. Nespoli,
  • R.M. Magee,
  • F. Warmer,
  • A. Dinklage,
  • A. Matsuyama,
  • R. Sakamoto,
  • T. Nasu,
  • T. Tokuzawa,
  • T. Kinoshita,
  • K. Tanaka,
  • N. Tamura,
  • K. Nagaoka,
  • M. Nishiura,
  • Y. Takemura,
  • K. Ogawa,
  • G. Motojima,
  • T. Oishi,
  • Y. Morishita,
  • J. Varela,
  • W.H.J. Hayashi,
  • M. Markl,
  • H. Bouvain,
  • Y. Liang,
  • M. Leconte,
  • D. Moseev,
  • V.E. Moiseenko,
  • C.G. Albert,
  • I. Allfrey,
  • A. Alonso,
  • F.J. Arellano,
  • N. Ashikawa,
  • A. Azegami,
  • L. Bardoczi,
  • M. van Berkel,
  • M. Beurskens,
  • M.W. Binderbaue,
  • A. Bortolon,
  • S. Brezinsek,
  • R. Bussiahn,
  • A. Cappa,
  • D. Carralero,
  • I.C. Chan,
  • J. Cheng,
  • X. Dai,
  • D.J. Den Hartog,
  • C.P. Dhard,
  • F. Ding,
  • A. Ejiri,
  • S. Ertmer,
  • T. Fornal,
  • K. Fujita,
  • Y. Fujiwara,
  • H. Funaba,
  • L. Garcia,
  • J.M. Garcia-Regana,
  • I. Garcia-Cortés,
  • I.E. Garkusha,
  • D.A. Gates,
  • Y. Ghai,
  • E.P. Gilson,
  • H. Gota,
  • M. Goto,
  • E.M. Green,
  • V. Haak,
  • S. Hamaguchi,
  • K. Hanada,
  • H. Hara,
  • D. Hartmann,
  • Y. Hayashi,
  • T. Henning,
  • C. Hidalgo,
  • J. Hillairet,
  • R. Hutton,
  • T. Ido,
  • H. Igami,
  • K. Ikeda,
  • S. Inagaki,
  • A. Ishizawa,
  • S. Ito,
  • M. Isobe,
  • Y. Isobe,
  • M. Ivkovic,
  • Z. Jiang,
  • J. Jo,
  • S. Kamio,
  • H. Kasahara,
  • D. Kato,
  • Y. Katoh,
  • Y. Kawachi,
  • Y. Kawamoto,
  • G. Kawamura,
  • T. Kawate,
  • Ye.O. Kazakov,
  • V. Klumper,
  • A. Knieps,
  • W.H. Ko,
  • S. Kobayashi,
  • F. Koike,
  • Yu.V. Kovtun,
  • M. Kubkowska,
  • S. Kubo,
  • S.S.H. Lam,
  • A. Langenberg,
  • H. Laqua,
  • S. Lazerson,
  • J. Lestz,
  • B. Li,
  • L. Liao,
  • Z. Lin,
  • R. Lunsford,
  • S. Masuzaki,
  • H. Matsuura,
  • K.J. McCarthy,
  • D. Medina-Roque,
  • O. Mitarai,
  • A. Mollen,
  • C. Moon,
  • Y. Mori,
  • T. Morisaki,
  • S. Morita,
  • K. Mukai,
  • I. Murakami,
  • S. Murakami,
  • T. Murase,
  • C.M. Muscatello,
  • K. Nagasaki,
  • D. Naujoks,
  • H. Nakano,
  • M. Nakata,
  • Y. Narushima,
  • A. Nagy,
  • J.H. Nicolau,
  • T. Nishizawa,
  • S. Nishimoto,
  • H. Nuga,
  • M. Nunami,
  • R. Ochoukov,
  • S. Ohdachi,
  • J. Ongena,
  • M. Osakabe,
  • N.A. Pablant,
  • N. Panadero,
  • B. Peterson,
  • J. de la Riva Villén,
  • J. Romazanov,
  • J. Rosato,
  • M. Rud,
  • S. Sakakibara,
  • H.A. Sakaue,
  • H. Sakai,
  • I. Sakon,
  • M. Salewski,
  • S. Sangaroon,
  • S. Sereda,
  • T. Stange,
  • K. Saito,
  • S. Satake,
  • R. Seki,
  • T. Seki,
  • S. Sharapov,
  • A. Shimizu,
  • T. Shimozuma,
  • G. Shivam,
  • M. Shoji,
  • D.A. Spong,
  • H. Sugama,
  • Z. Sun,
  • C. Suzuki,
  • Y. Suzuki,
  • T. Tajima,
  • E. Takada,
  • H. Takahashi,
  • K. Toi,
  • Y. Tsuchibushi,
  • N. Tsujii,
  • K. Tsumori,
  • T.I. Tsujimurai,
  • G. Ueno,
  • H. Uehara,
  • J.L. Velasco,
  • E. Wang,
  • K.Y. Watanabe,
  • T. Wauter,
  • U. Wenzel,
  • M. Yajima,
  • H. Yamada,
  • I. Yamada,
  • K. Yanagihara,
  • H. Yamaguchi,
  • R. Yanai,
  • R. Yasuhara,
  • M. Yokoyama,
  • Y. Yoshimura,
  • M. Zarnstorff,
  • M. Zhao,
  • G.Q. Zhong,
  • Q. Zhou,
  • S. Ziaei,
  • LHD Experiment Group,
  • the W7-X Team

DOI
https://doi.org/10.1088/1741-4326/ad3a7a
Journal volume & issue
Vol. 64, no. 11
p. 112009

Abstract

Read online

Recently, experiments on basic plasma physics issues for solving future problems in fusion energy have been performed on a Large Helical Device. There are several problems to be solved in future devices for fusion energy. Emerging issues in burning plasma are: alpha-channeling (ion heating by alpha particles), turbulence and transport in electron dominant heating helium ash exhaust, reduction of the divertor heat load. To solve these problems, understanding the basic plasma physics of (1) wave–particle interaction through (inverse) Landau damping, (2) characteristics of electron-scale (high- k ) turbulence, (3) ion mixing and the isotope effect, and (4) turbulence spreading and detachment, is necessary. This overview discusses the experimental studies on these issues and turbulent transport in multi-ion plasma and other issues in the appendix.

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