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Synchronization between computation and acquisition parts in the GEM detector-based measurement system

The presented system is used for monitoring of the plasma impurities in the tokamak. It is done by measuring radiation in Soft X-Ray range with the use of a GEM-based detector. Acquired data is transferred through the whole system with low latency. Presented system can be divided into many parts - d...

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Detalles Bibliográficos
Autores principales: Linczuk, Pawel, Zabolotny, Wojciech M, Wojenski, Andrzej, Krawczyk, Rafal D, Pozniak, Krzysztof T, Chernyshova, Maryna, Czarski, Tomasz, Gaska, Michal, Kasprowicz, Grzegorz, Kowalska-Strzeciwilk, Ewa, Malinowski, Karol
Lenguaje:eng
Publicado: 2019
Acceso en línea:https://dx.doi.org/10.1117/12.2536777
http://cds.cern.ch/record/2702938
Descripción
Sumario:The presented system is used for monitoring of the plasma impurities in the tokamak. It is done by measuring radiation in Soft X-Ray range with the use of a GEM-based detector. Acquired data is transferred through the whole system with low latency. Presented system can be divided into many parts - detector, analog electronics, FPGA, PCIe transmission line and computer system with high-performance CPU. This work will concentrate on synchronization between FPGA, which write data to the memory on the CPU side and computational part, which is executed in the computer. In long-running measurements, there is a synchronization problems which can arise. There is a difference in variables based on which the execution time of both parts is dependent. Working on measurements of radiation of plasma impurities requires limits in terms of latency. This paper presents reasons, descriptions and solutions for such problems.