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Memorias de investigación
Communications at congresses:
Self-adaptive sampling rate data acquisition in JET’s correlation reflectometer
Year:2008
Research Areas
  • Electronic
Information
Abstract
Data acquisition systems with self-adaptive sampling rate capabilities have been proposed as a solution to reduce the shear amount of data collected in every discharge of present fusion devices. This paper discusses the design of such a system for its use in the KG8B correlation reflectometer at JET. The system, which is based on the ITMS platform, continuously adapts the sample rate during the acquisition depending on the signal bandwidth. Data are acquired continuously at the expected maximum sample rate and transferred to a memory buffer in the host processor. Thereafter the rest of the process is based on software. Data are read from the memory buffer in blocks and for each block an intelligent decimation algorithm is applied. The decimation algorithm determines the signal bandwidth for each block in order to choose the optimum sample rate for that block, and from there the decimation factor to be used. Memory buffers are used to adapt the throughput of the three main software modules (data acquisition, processing, and storage) following a typical producer-consumer architecture. The system optimizes the amount of data collected while maintaining the same information. Design issues are discussed and results of performance evaluation are presented.
International
Si
Congress
17th Topical Conference on High-Temperature Plasma Diagnostics
960
Place
Albuquerque, New Mexico
Reviewers
Si
ISBN/ISSN
0883185636
Start Date
11/05/2008
End Date
15/05/2008
From page
0
To page
0
REVIEW OF SCIENTIFIC INSTRUMENTS
Participants
  • Autor: ANTONIO FONSECA (Associação EURATOM / IST, Instituto de Plasmas e Fusão Nuclear)
  • Autor: JESÚS VEGA (Asociación EURATOM/CIEMAT para Fusión.)
  • Autor: Guillermo de Arcas Castro (UPM)
  • Autor: Mariano Ruiz Gonzalez (UPM)
  • Autor: JET-EFDA Contributors (Grupo)
  • Autor: Eduardo Barrera Lopez de Turiso (UPM)
  • Autor: Andrea Murari (Consorzio RFX – Associazione EURATOM ENEA per la Fusione)
  • Autor: Juan Manuel Lopez Navarro (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Investigación en Instrumentación y Acústica Aplicada (I2A2)
  • Departamento: Sistemas Electrónicos y de Control
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