The software-defined fast post-processing for GEM soft x-ray diagnostics in the Tungsten Environment in Steady-state Tokamak thermal fusion reactor
Rafał Krawczyk , Tomasz Czarski , Paweł Linczuk , Andrzej Wojeński , Piotr Kolasiński , Michał Gąska , M. Chernyshova , Dider Mazon , Axel Jardin , Philippe Malard , Krzysztof Poźniak , Grzegorz Henryk Kasprowicz , Wojciech Zabołotny , Ewa Kowalska-Strzęciwilk , Karol Malinowski
AbstractThis article presents a novel software-defined server-based solutions that were introduced in the fast, real-time computation systems for soft X-ray diagnostics for the WEST (Tungsten Environment in Steady-state Tokamak) reactor in Cadarache, France. The objective of the research was to provide a fast processing of data at high throughput and with low latencies for investigating the interplay between the particle transport and magnetohydrodynamic activity. The long-term objective is to implement in the future a fast feedback signal in the reactor control mechanisms to sustain the fusion reaction. The implemented electronic measurement device is anticipated to be deployed in the WEST. A standalone software-defined computation engine was designed to handle data collected at high rates in the server back-end of the system. Signals are obtained from the front-end field-programmable gate array mezzanine cards that acquire and perform a selection from the gas electron multiplier detector. A fast, authorial library for plasma diagnostics was written in C++. It originated from reference offline MATLAB implementations. They were redesigned for runtime analysis during the experiment in the novel online modes of operation. The implementation allowed the benchmarking, evaluation, and optimization of plasma processing algorithms with the possibility to check the consistency with reference computations written in MATLAB. The back-end software and hardware architecture are presented with data evaluation mechanisms. The online modes of operation for the WEST are discussed. The results concerning the performance of the processing and the introduced functionality are presented.
|Journal series||REVIEW OF SCIENTIFIC INSTRUMENTS, ISSN 0034-6748, (A 25 pkt)|
|Publication size in sheets||0.65|
|Keywords in English||Heterogeneous Systems, High Performance Computing, Parallel Computing, Plasma Physics, Fast Data Processing, Intel Xeon, High Throughput Computing|
|Language||en angielski , en angielski|
|Score|| = 25.0, 02-07-2018, ArticleFromJournal|
= 30.0, 02-07-2018, ArticleFromJournal
|Publication indicators||: 2016 = 1.515 (2) - 2016=1.616 (5)|
|Citation count*||1 (2018-11-16)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.