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Journal Articles

Architecture plan of the real-time diagnostic signals acquisition system toward JT-60SA project

Sakata, Shinya; Yamaguchi, Taiji; Sugimura, Toru; Kominato, Toshiharu; Kawamata, Yoichi; Totsuka, Toshiyuki; Sato, Minoru; Sueoka, Michiharu; Naito, Osamu

Fusion Science and Technology, 60(2), p.496 - 500, 2011/08

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

For a steady state operation of JT-60SA, a plasma feedback control using various diagnostic sensor signals plays an essential role. To realize this, Real Time Diagnostic Signals acquisition System, RTDS, which utilizes PC-based real-time OS "INtime", has been under consideration toward JT-60SA project. Moreover, long-time experiments more than 100 seconds will be planned in JT-60SA project. Therefore, real time monitoring will be required as an essential function that displays acquired diagnostic signals on real time during long-time experiment. This function will be also realized by utilizing RTDS.

Journal Articles

Development of PC-based control system in JT-60SA

Kawamata, Yoichi; Sugimura, Toru; Yamaguchi, Taiji; Sueoka, Michiharu; Sakata, Shinya; Totsuka, Toshiyuki; Sato, Minoru; Kominato, Toshiharu; Naito, Osamu

Fusion Science and Technology, 60(2), p.491 - 495, 2011/08

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

Journal Articles

Improvement of the real-time processor in JT-60 data processing system

Sakata, Shinya; Kiyono, Kimihiro; Sato, Minoru; Kominato, Toshiharu; Sueoka, Michiharu; Hosoyama, Hiroki; Kawamata, Yoichi

Fusion Engineering and Design, 84(7-11), p.1680 - 1683, 2009/06

 Times Cited Count:1 Percentile:10.95(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Development of new mass data acquisition system for diagnostics on JT-60U

Oshima, Takayuki; Kiyono, Kimihiro; Sakata, Shinya; Sato, Minoru; Kominato, Toshiharu; Ozeki, Takahisa

Fusion Engineering and Design, 83(2-3), p.330 - 333, 2008/04

 Times Cited Count:1 Percentile:10.92(Nuclear Science & Technology)

We have developed a prototype of new mass data acquisition system (P-MDAS) that can perform a faster data acquisition. This system is based on a general-purpose PXI (Compact PCI) bus standard. In 2004, standalone vivifications on the performance of P-MDAS were carried out (8- channel ADC, hard disk streaming). In 2005 and 2006, we examined its performance under the following environments: under remote diagnostic control using optical communication interface, under multiple controller PCs, under multiple PXI boards to increase the number of channels, under a long duration of data acquisition (45 seconds) with a high sampling rate (1 MHz) and a high resolution (14 bit). At the same time, we developed a MDAS server (UNIX WS) and verified its performance on the data transfer to Inter-Shot Processor. We are planning to increase the number of channels and conduct a performance verification of overall data processing system (DPS) with 10 GB/Shot of data acquisition.

Oral presentation

Remodeling of diagnostic systems to network-oriented systems on JT-60U

Sato, Minoru; Nagasaka, Yasushi*; Kiyono, Kimihiro; Sakata, Shinya; Kominato, Toshiharu

no journal, , 

Since the start of operation, many of the JT-60U's diagnostic systems have been utilizing the CAMAC as measurement bus for control and data acquisition of plasma diagnostics. To improve the maintainability and functionality, a major remodeling of those systems was done in 2003. Mini-computers and microcomputers, which used to control CAMAC and acquire data, were replaced with UNIX-based workstations, and software for more flexible control and data acquisition was developed from the original software. Since the remodeling, each diagnostic system has been gradually replaced with VME, PCI and PXI instead of CAMAC, to meet the demands of individual diagnostic devices; to handle increasing volume of data resulting from long pulse discharges of advanced experiments. For remaining CAMAC systems, computers were upgraded to Linux-based systems, and the device driver for CAMAC based on PCI was newly developed. Moreover, legacy software has been redesigned and new software based on a network communication framework, such as server-client communication, is being developed for realizing a decentralized control system by using VME and PCI Linux platforms. In this paper, detailed remodeling of JT-60U's diagnostic systems to network-oriented systems that are suitable for remote collaboration is described.

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