Two-dimensional beam emission spectroscopy for hydrogen isotope negative neutral beam in Large Helical Device

• Kobayashi, Tatsuya

• YOSHINUMA, Mikiro

• IDA, Katsumi

抄録

0000-0001-5669-1937

A new beam emission spectroscopy system that has improved lines of sight is installed in the Large Helical Device (LHD), and routine measurement has been started in the 21st LHD experiment campaign in 2019–2020. The new system is optimized for hydrogen isotope experiments by equipping a rotatable large-diameter interference filter to be compatible with either the hydrogen or the deuterium beam emission component. An avalanche photo diode detector array having 8 × 8 pixels is used for obtaining a radial–vertical image of electron density fluctuation covering the mid-radius to the plasma periphery. Spatial resolution and wavenumber cutoff are derived from equilibrium reconstruction and plasma kinetic profiles. Obtained fluctuation data is presented for a low field high beta discharge. The spatiotemporal structure of the fluctuations is clearly shown by Fourier correlation analyses.

収録刊行物

• Plasma Physics and Controlled Fusion

  Plasma Physics and Controlled Fusion 62 (12), 125011-, 2020-10-28

  IOP Publishing

詳細情報

• CRID: 1050570232449660288
• NII論文ID: 120007116687
• NII書誌ID: AA12472556
• ISSN: 13616587
• HANDLE: 10655/00012584
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/10602
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles