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Okamura, S.

Paper Title Page
TUD005 Large-scale Fusion Research System Integration Based on the Superconducting Large Helical Device and Plasma Simulator at NIFS 352
 
  • S. Sudo, M. Emoto, R. Horiuchi, S. Imagawa, S. Imazu, S. Ishiguro, Y. Ito, O. Kaneko, K. Kawahata, M. Kojima, A. Komori, T. Mutoh, Y. Nagayama, N. Nakajima, H. Nakanishi, M. Nonomura, M. Ohsuna, N. Ohyabu, S. Okamura, H. Sugama, Y. Takeiri, H. Yamada, T. Yamamoto
    NIFS, Gifu
  
  The representative facilities at NIFS are the superconducting Large Helical Device (LHD) and Plasma Simulator. An overview of such a large-scale fusion research system will be presented. LHD is the plasma confining machine with having superconducting helical and poloidal coils. The LHD experiment started in 1998, and stable operation under the condition of liquid He temperature with a continuous operation for half a year typically at each year has been so far successfully demonstrated for the period of 11 years. Real-time machine control and data acquisition of diagnostics are also established well for long pulse operation up to 54 min. For understanding the plasma properties, Plasma Simulator consists of a supercomputer having 77 TF computing speed and 16 TB main memory (these will be upgraded to 315 TF and 32 TB in 2012). The main aim of the Plasma Simulator is to construct LHD Numerical Test Reactor for designing an optimum reactor. Experimental remote participation to the LHD experiment and remote utilization of Plasma Simulator are well realized with the fast network SINET3. Such successful system integration will contribute to design of future large research systems.  
WED003 Progress of the Virtual Laboratory for Fusion Researches in Japan 618
 
  • T. Yamamoto, S. Ishiguro, Y. Nagayama, H. Nakanishi, S. Okamura, S. Takami
    NIFS, Gifu
  • K. Hiraki
    IST, Tokyo
  
  Funding: A part of SNET is partly supported by Cyber Science Infrastracture development project of the National Institute of Informatics.

SNET is a virtual laboratory system for nuclear fusion research in Japan, it has been developed since 2001 with SINET3, which is a national academic network backbone operated by National Institute of Informatics. Twenty one sites including major Japanese universities, Japan Atomic Energy Agency and National Institute for Fusion Science (NIFS) are mutually connected on SNET with the speed of 1 Gbps in 2008 fiscal year. The SNET is a closed network system based on L2/L3VPN. Collaboration categories in SNET are as follows: the LHD remote participation; the remote use of supercomputer system; the all Japan Spherical Tokamak (ST) research program. For example, the collaborators of the first category in a remote station can control their diagnostic devices at LHD and analyze the LHD data as if they were at the LHD control room. ITER activity has started in 2007 and 'The ITER Remote Experimentation Centre' will be constructed at the Rokkasho village in Japan under ITER-BA agreement. SNET would be useful for distributing the data of ITER to Japanese universities and institutions.