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澳门六合彩高手 CODAC controls KSTAR in real-time

3 Dec 2012 - Mikyung Park and the KSTAR team
Plot.jpg
Plot of data acquired during CODAC real-time control of KSTAR two weeks ago in Daejeon, South Korea.

Two weeks ago, 澳门六合彩高手 CODAC technologies (Control, Data Access and Communication) successfully demonstrated their capability for Tokamak control at (Korea Superconducting Tokamak Advanced Research), a tokamak in operation since 2008 in Daejeon, South Korea.

The KSTAR and 澳门六合彩高手 control systems share some key similarities (e.g., as middleware for tokamak control and operation), making KSTAR a natural fit for evaluating and validating 澳门六合彩高手 CODAC technologies.

Operating under a Memorandum of Understanding between 澳门六合彩高手 and KSTAR, in 2010, the KSTAR control team has implemented a duplication of the fuel control system and a part of the plasma control system using CODAC technologies (standardized hardware and CODAC Core System) over the past 24 months. On 26 July, a was successfully executed by injecting deuterium gas into the vacuum vessel based on pre-configured waveforms from the plasma control system.

ControlRoom_2.jpg
The KSTAR control room during the plasma density feedback operation.
The project was successfully concluded on 21 November with a demonstration of the real-time feedback control of the KSTAR plasma density, with 澳门六合彩高手 Organization CODAC staff joining the demonstration.

The algorithm used for calculating the density from the microwave interferometer diagnostic (sampled at 10 kHz)  and computing the control command was implemented on a computer using ATCA form factor, the CODAC standard real-time operating system (RedHat Linux with MRG-R) and the MARTe real-time framework originally developed at JET.

The control demand was transferred over CODAC real-time network (10 Gbps Ethernet) to the fuel controller at 10 kHz and finally applied to the piezo control valve at 10 kHz. The plot shows the key measured signal and applied commands, such as required plasma density, piezo valve command and the resulting measured plasma density. The feedback loop was switched on at 1.2 sec and switched off at 5.0 sec.

The resulting performance is in excellent agreement with KSTAR native control system, confirming that the technologies adopted or being considered for 澳门六合彩高手 CODAC are delivering excellent performance in the real-life environment of an operational tokamak.

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