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Author(s):
K. Yamazaki, H. Yamada, K.Y.Watanabe, K. Nishimura, S. Yamaguchi, H. Nakanishi, A. Komori, H. Suzuki, T. Mito, H. Chikaraishi, K. Murai, O. Motojima and the LHD Group
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Title:
Overview of the Large Helical Device (LHD) Control System and Its First Operation
Date of publication:
Apr. 1999
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Key words:
central control system, LHD, operation scenario, protective interlock, man-machine interface, cryogenic control, computer network
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Abstract:
The first plasma operation of the Large Helical Device (LHD) fusion system has been successfully performed on March 31 in 1998 by means of the Central ('Chu-oh' in Japanese) Control System (COCOS) connected to ~50 subsystems using hard-wired interlock, optical-fiber timing and computer information network. From January 1998, the protective supervision system of COCOS went into service and the vacuum pumping control system started operation. The cryogenic control and the coil power supply control systems were utilized to cool down and energize the superconducting coils. The sequential control and timing control systems of COCOS have successfully started operation for a first plasma production. A variety of machine operations and plasma experiments will be continued on LHD using these flexible, reliable and advanced control systems.
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