Development of 2D Potential Profile Measurements Using the Heavy Ion Beam Probe on the Large Helical Device

• SHIMIZU Akihiro

  National Institute for Fusion Science

• IDO Takeshi

  National Institute for Fusion Science Graduate School of Engineering, Nagoya University

• NISHIURA Masaki

  Graduate School of Frontier Sciences, The University of Tokyo

• TAKAHASHI Hiromi

  National Institute for Fusion Science

• IGAMI Hiroe

  National Institute for Fusion Science

• YOSHIMURA Yasuo

  National Institute for Fusion Science

• KUBO Shin

  National Institute for Fusion Science Graduate School of Engineering, Nagoya University

• SHIMOZUMA Takashi

  National Institute for Fusion Science

• KATO Shinji

  National Institute for Fusion Science

• YOKOYAMA Masayuki

  National Institute for Fusion Science The Graduate University for Advanced Studies (Sokendai)

• LHD Experiment Group

  National Institute for Fusion Science

Abstract

Two-dimensional potential fluctuation profiles were measured with the heavy ion beam probe (HIBP) on the Large Helical Device. For two-dimensional measurements with HIBP, the probe beam energy had to be changed, and subtle adjustment of the beam trajectory along the long beam transport line (∼20 m) was required. An automatic beam adjustment system was developed for the beam transport line, and used to easily adjust the probe beam trajectory. Potential fluctuations in the high-frequency range (∼200 kHz) were measured, and the probe beam energy was changed shot to shot. Two-dimensional potential phase structures were successfully obtained by analyzing the coherence between potential and magnetic field fluctuation, which is used as a reference signal.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 11 (0), 2402123-2402123, 2016

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• heavy ion beam probe (HIBP)
• two-dimensional potential profile
• helical device
• the Large Helical Device (LHD)

Details

• CRID: 1390282680231813632
• NII Article ID: 130005395309
• NII Book ID: AA12346775
• DOI: 10.1585/pfr.11.2402123
• ISSN: 18806821
• HANDLE: 10655/00013312
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/11383
• Web Site: https://www.jstage.jst.go.jp/article/pfr/11/0/11_2402123/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed