Construction of negative-ion-based neutral beam teststand for Large Helical Device (LHD)

Y. Oka, A. Ando, O. Kaneko, Y. Takeiri, K. Tsumori, R. Akiyama, T. Kawamoto, K. Mineo, T. Kurata, T. Kuroda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A test stand for the negative-ion-based NBI (neutral beam injector) for the LHD, currently under construction, has neutral beam capabilities of 2.5 MW at a beam energy of 125 keV (H0)/250 keV (D0) and pulse duration of 10 s. Components being developed are as follows: (1) a large and high current negative ion source which is immersed in vacuum and composed of a compact modular ion source; (2) a beam dump to remove high heat flux up to 1.6 kW/cm2; (3) a high-pumping-speed (450 m3/s) cryopump; (4) a 250-kV power supply system using a GTO (gate turn-off thyristor); and (5) a controller system to vary the beam energy within 0.5 s.Testing will commence in the spring of 1992 at Toki new site.

Original languageEnglish
Title of host publicationProceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages70-73
Number of pages4
ISBN (Electronic)0780301323
DOIs
Publication statusPublished - 1991 Jan 1
Externally publishedYes
Event14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991 - San Diego, United States
Duration: 1991 Sep 301991 Oct 3

Publication series

NameProceedings - Symposium on Fusion Engineering

Conference

Conference14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991
Country/TerritoryUnited States
CitySan Diego
Period91/9/3091/10/3

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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