In the first practical use of ITER's real-time framework, a prototype system has been developed in conjuction with the Department of Microelectronics and Computer Science, Lodz University of Technology, for Thomson scattering diagnostics data acquisition and processing.
The results obtained confirmed that RTF performs as expected, and that it can be used successfully in applications requiring multi-threaded high-performance data processing. "The prototype Thompson scattering system using the RTF was able to process data and provide final measurements within 5-6 ms, which is fully enough for a system working with a 20-50 Hz repetition rate," says Lee. "Moreover, the RTF hides many details specific to real-time systems (e.g., thread management, inter-thread data transfers, etc.), making the design and development of real-time software much easier and faster. The developed prototype—covering complete data acquisition, the processing path, archiving, as well as measurement publishing—can be used as a reference example for other ITER diagnostic systems."
From his office at the Lodz University of Technology, Piotr Perek is watching data scroll in from the Thompson scattering diagnostic on the KSTAR tokamak in Korea. It was the first evaluation of a high-performance data processing application implemented using a real-time framework for one of the diagnostic systems critical to controlling the ITER plasma.