Self-adaptive sampling rate data acquisition in JET’s correlation reflectometer

Arcas Castro, Guillermo de and López Navarro, Juan Manuel and Barrera Lopez de Turiso, Eduardo and Vega, Jesús and Ruiz González, Mariano and Murari, Andrea (2008). Self-adaptive sampling rate data acquisition in JET’s correlation reflectometer. "Review of Scientific Instruments", v. 79 (n. 10); pp.. ISSN 0034-6748. https://doi.org/10.1063/1.2965011.

Description

Title: Self-adaptive sampling rate data acquisition in JET’s correlation reflectometer
Author/s:
  • Arcas Castro, Guillermo de
  • López Navarro, Juan Manuel
  • Barrera Lopez de Turiso, Eduardo
  • Vega, Jesús
  • Ruiz González, Mariano
  • Murari, Andrea
Item Type: Article
Título de Revista/Publicación: Review of Scientific Instruments
Date: October 2008
ISSN: 0034-6748
Volume: 79
Subjects:
Faculty: E.U.I.T. Telecomunicación (UPM)
Department: Sistemas Electrónicos y de Control [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 2614
DC Identifier: http://oa.upm.es/2614/
OAI Identifier: oai:oa.upm.es:2614
DOI: 10.1063/1.2965011
Official URL: http://rsi.aip.org/rsinak/v79/i10
Deposited by: Memoria Investigacion
Deposited on: 18 Mar 2010 12:58
Last Modified: 20 Apr 2016 12:15
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