Real-time multi-threaded reflectometry density profile reconstructions on COMPASS Tokamak

0521657 - ÚFP 2020 RIV GB eng J - Článek v odborném periodiku
Lourenco, P. D. - Santos, J.M. - Bogár, Ondrej - Havránek, Aleš - Havlíček, Josef - Zajac, Jaromír - Hron, Martin - Pánek, Radomír - Fernandes, H.
Real-time multi-threaded reflectometry density profile reconstructions on COMPASS Tokamak.
Journal of Instrumentation. Roč. 14, November (2019), č. článku C11023. ISSN 1748-0221. E-ISSN 1748-0221
Grant CEP: GA MŠMT(CZ) LM2015045
Institucionální podpora: RVO:61389021
Klíčová slova: plasma position * microwave reflectometry * upgrade * Computing (architecture, farms, GRID for recording, storage, archiving, and distribution of data) * Control systems * Data processing methods * Nuclear instruments and methods for hot plasma diagnostics
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.454, rok: 2019
Způsob publikování: Omezený přístup
https://iopscience.iop.org/article/10.1088/1748-0221/14/11/C11023

In COMPASS tokamak, the ordinary mode (O-mode) microwave reflectometry diagnostic has been equipped with an upgraded acquisition system and dedicated computational node running the Multi-Threaded Application Real-Time executor (MARTe). This upgrade aims at the deployment of a real-time (RT) plasma position reflectometry (PPR) diagnostic system for future application in closed-loop plasma position control experiments. The system is synchronized with COMPASS MARTe main controller slow cycle, running at 500 mu s, and allows a maximum measurement delivery latency of 450 mu s. The RT signal processing algorithms, used to reconstruct the O-mode density profiles are the most time consuming step in the control cycle. This is due to the computation of a large number of Fast Fourier Transforms (FFT) over long data arrays, produced for each reflectometry profile measurement.
Trvalý link: http://hdl.handle.net/11104/0306246