Development of 6-MeV heavy ion beam probe on LHD

T. Ido, A. Shimizu, M. Nishiura, S. Kato, H. Nakano, S. Ohshima, M. Yokoyama, S. Murakami, A. Wakasa, S. Nakamura, M. Yokota, K. Tsukada, H. Ogawa, T. Inoue

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A heavy-ion beam probe (HIBP) using a 3-MV tandem accelerator was installed in Large Helical Device (LHD). It is designed to measure the electrostatic potential in the core region directly. The electrostatic potential profiles can be measured successfully using the HIBP, and the radial electric field predicted by the neoclassical theory is consistent with that measured using the HIBP as long as the ambipolarity condition of the neoclassical particle flux has a single solution. Although the turbulent fluctuation is not detected because of low signal-to-noise ratio, several coherent fluctuations, which are inferred to be reversed-shear-induced Alfvén eigenmode and the geodesic acoustic mode, are observed directly in core plasmas, and the spatial distribution is revealed.

Original languageEnglish
Pages (from-to)436-444
Number of pages9
JournalFusion Science and Technology
Issue number1
Publication statusPublished - 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • General Materials Science
  • Mechanical Engineering


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