Continuous Plasma density measurement in TJ-II infrared interferometer-Advanced signal processing based on FPGAs

Esteban Hernandez, Luis and Sanchez, Miguel and López Martín, Juan Antonio and Nieto-Taladriz García, Octavio and Sanchez, J. (2010). Continuous Plasma density measurement in TJ-II infrared interferometer-Advanced signal processing based on FPGAs. "Fusion Engineering and Design", v. 85 (n. 3-4); pp. 328-331. ISSN 0920-3796. https://doi.org/10.1016/j.fusengdes.2010.03.036.

Description

Title: Continuous Plasma density measurement in TJ-II infrared interferometer-Advanced signal processing based on FPGAs
Author/s:
  • Esteban Hernandez, Luis
  • Sanchez, Miguel
  • López Martín, Juan Antonio
  • Nieto-Taladriz García, Octavio
  • Sanchez, J.
Item Type: Article
Título de Revista/Publicación: Fusion Engineering and Design
Date: July 2010
ISSN: 0920-3796
Volume: 85
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Ingeniería Electrónica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This work presents the behavioral simulation in an FPGA of a novel processing system for measuring line average electronic density in the TJ-II stellarator diagnostic, Infra-Red Two-Color Interferometer. Line average electronic density is proportional to phase difference between probing and reference signals of the interferometer, as the Appleton–Hartree cold plasma model states. The novelty of the approach is the development of a real time measuring system where research work has been carried out in two ways: a new interpolation algorithm and the implementation of a new specific processor on an FPGA. The main goal of this new system is to measure line plasma electronic density for several channels in real time, also it will be useful to eliminate intermediate mixing frequency stages (the output signals coming from the interferometer are going to be directly sampled) and finally to generate real time density signals for control purposes in TJ-II and in other diagnostics. This device is intended to be the new data acquisition-processing system for the future six channel infrared interferometer that requires at least 14 input signals. The knowledge acquired could be useful in the design of W7-X and ITER IR-interferometer data acquisition and processing systems.

More information

Item ID: 9608
DC Identifier: http://oa.upm.es/9608/
OAI Identifier: oai:oa.upm.es:9608
DOI: 10.1016/j.fusengdes.2010.03.036
Official URL: http://www.sciencedirect.com/science/journal/09203796
Deposited by: Memoria Investigacion
Deposited on: 10 Nov 2011 09:17
Last Modified: 20 Apr 2016 17:57
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