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Kawai, Mikito; Akino, Noboru; Ikeda, Yoshitaka; Ebisawa, Noboru; Honda, Atsushi; Kazawa, Minoru; Kikuchi, Katsumi; Mogaki, Kazuhiko; Noto, Katsuya; Oshima, Katsumi; et al.
JAEA-Technology 2008-069, 32 Pages, 2008/10
JAEA-Technology-2008-069.pdf:6.75MB
The neutral beam injection system for JT-60U consists of positive-ion based type(P-NBI) and negative-ion based type(N-NBI). The reionization losses of neutral beams in the drift ducts of both P-NBI and N-NBI are estimated using the data of ambient pressure and gas flow rate into the beamlines. This system was not enough to obtain detail injection power for a long pulse operation. Modifications of the system to obtain reionization loss for a long pulse operation have been conducted. The new system has a capability to measure the pressures of drift duct during operation. The system can calculate the reionization loss automatically during the pulse from the measured pressure. More acurate injection power can be obtained by this new system.
Shinozaki, Shinichi; Honda, Atsushi; Oshima, Katsumi; Shimizu, Tatsuo; Numazawa, Susumu*; Ikeda, Yoshitaka
JAEA-Technology 2008-048, 23 Pages, 2008/07
JAEA-Technology-2008-048.pdf:8.1MB
The modification of the JT-60U to a fully superconducting coil tokamak, JT-60SA, has been programmed as the satellite devise for the ITER and as the national centralized tokamak. The present positive-ion-based NBI system, which has employed the expensive CAMAC and has been operated for 20 years, is required to extend its pulse duration from 30 s to 100 s for JT-60SA. Recently, the frequency of troubles on the data acquisition system has increased due to its age-induced deterioration. To realize the long pulse operation and to maintain the high reliability on JT-60SA, we set to develop a new acquisition system. As a first step, we have designed and constructed a prototype acquisition system, which is combined with instruments highly available on the market, to confirm the basic performance. The result indicates that the new system allows us to construct a highly flexible and user-friendly acquisition system at low cost without highly technical software developing.
Okano, Fuminori; Shinozaki, Shinichi; Honda, Atsushi; Oshima, Katsumi; Numazawa, Susumu*; Ikeda, Yoshitaka
Fusion Engineering and Design, 83(2-3), p.280 - 282, 2008/04
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Honda, Atsushi; Okano, Fuminori; Oshima, Katsumi; Akino, Noboru; Kikuchi, Katsumi; Tanai, Yutaka; Takenouchi, Tadashi; Numazawa, Susumu*; Ikeda, Yoshitaka
Fusion Engineering and Design, 83(2-3), p.276 - 279, 2008/04
Times Cited Count：11 Percentile：59.51(Nuclear Science & Technology)The control system of the cryogenic facility in the JT-60 NBI system has been renewed by employing the PLC (Programmable Logic Controller) and SCADA (Supervisory Control And Data Acquisition) system. The original control system was constructed about 20 years ago by specifying the DCS (Distributed Control System) computer to deal with 400 feedback loops. Recently, troubles on this control system have increased due to its aged deterioration. To maintain a high reliability of the cryogenic facility, a new control system has been intended with PLC and SCADA system. By optimizing the function blocks and connecting them in the FBD language, the feedback loops in the new control system have been successfully replaced from DCS to PLC without software developer. At present, the new control system has worked well. This is the first application of the marketable PLC to the actual system with feedback loops of 
400 produced by the user itself.
Honda, Atsushi; Okano, Fuminori; Shinozaki, Shinichi; Oshima, Katsumi; Numazawa, Susumu*; Ikeda, Yoshitaka
JAEA-Technology 2007-026, 19 Pages, 2007/03
JAEA-Technology-2007-026.pdf:3.36MB
The modification of the JT-60U to a fully superconducting coil tokamak, JT-60SA (Super Advanced), has been programmed as the satellite devise for the ITER (International Thermonuclear Experimental Reactor) and as the national centralized tokamak. The present positive-ion-based NBI system (P-NBI), which has been operated for 20 years and will be the main heating system on JT-60SA, is required to manage the long pulse injection extended from 30 s to 100 s at the power of 24 MW with 12 units. To realize such a requirement, the original control system handling more than 4000 digital data is to be fully remodeled. Design study of the new control system has been conducted from viewpoint of market availability, system extensibility, cost-effectiveness and independent development in programming. It has been concluded that a distributed control system using PLC (Programmable Logic Controller) could be applied to the large-scale control system for 100-s operations with satisfaction of the evaluation viewpoints.
Honda, Atsushi; Okano, Fuminori; Oshima, Katsumi; Akino, Noboru; Kikuchi, Katsumi; Tanai, Yutaka; Takenouchi, Tadashi; Numazawa, Susumu*
JAEA-Technology 2006-020, 20 Pages, 2006/03
JAEA-Technology-2006-020.pdf:2.96MB
no abstracts in English
Okano, Fuminori; Honda, Atsushi; Oshima, Katsumi; Akino, Noboru; Kikuchi, Katsumi; Numazawa, Susumu*
Keiso, 49(3), p.22 - 26, 2006/03
no abstracts in English
Honda, Atsushi; Kawai, Mikito; Okano, Fuminori; Oshima, Katsumi*; Numazawa, Susumu*; Oga, Tokumichi; Ikeda, Yoshitaka
Heisei-16-Nendo Osaka Daigaku Sogo Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 Pages, 2005/03
no abstracts in English
Okano, Fuminori; Honda, Atsushi; Oshima, Katsumi; Numazawa, Susumu*
no journal, ,
no abstracts in English
Okano, Fuminori; Honda, Atsushi; Oshima, Katsumi; Akino, Noboru; Kikuchi, Katsumi; Numazawa, Susumu*
no journal, ,
no abstracts in English
Okano, Fuminori; Honda, Atsushi; Oshima, Katsumi; Shinozaki, Shinichi; Numazawa, Susumu*; Ikeda, Yoshitaka
no journal, ,
no abstracts in English
Honda, Atsushi; Shinozaki, Shinichi; Oshima, Katsumi; Shimizu, Tatsuo; Numazawa, Susumu*; Ikeda, Yoshitaka
no journal, ,
no abstracts in English
