Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Continuous Phase Measurement in the W7-X Infrared Interferometer by Means of a FPGA and High-Speed ADCs
Year:2010
Research Areas
  • Electric engineers, electronic and automatic (eil),
  • Electronic circuits,
  • Circuits for signal treatment and instrumentation
Information
Abstract
Interferometry is used for measuring line average electronic densities in fusion plasmas. The W7-X stellarator will employ a two-color CO2 (10.591 m) and CO (5.295 m) heterodyne-infrared interferometer as an electronic density measurement diagnostic. The frequency displacement is 40 MHz for the CO2 wavelength and 25 MHz for the CO, so these values will fix the heterodyne frequencies. Because the frequency gap between the two carriers is wide enough and the detector sensitivity is similar for both wavelengths, it is possible to use a single detector for the two signals; nevertheless, they should be split with filters. Traditionally, the intermediate-frequency signals should be filtered, downconverted to a lower frequency by the use of analog circuitry, and then processed. A new approach is proposed. The intermediate-frequency signals are directly sampled by means of high-speed analog-to-digital converters followed by a digital diplexer and a specific phase-meter processor implemented in a field-programmable gate array. Preliminary results from the W7-X infrared interferometer prototype, without plasma, are presented.
International
Si
JCR
Si
Title
FUSION SCIENCE AND TECHNOLOGY
ISBN
1536-1055
Impact factor JCR
0,696
Impact info
Volume
Journal number
From page
771
To page
777
Month
NOVIEMBRE
Ranking
Participants
  • Autor: Luis Esteban Hernández (UPM)
  • Autor: Miguel Sanchez Gómez (CIEMAT)
  • Autor: Joaquín Pedro Sanchez Sanz (CIEMAT)
  • Autor: Petra Kornejew (Max Planck Institüte)
  • Autor: Matthias Hirsch (Max Planck Institüte)
  • Autor: Juan Antonio Lopez Martin (UPM)
  • Autor: Angel Fernandez Herrero (UPM)
  • Autor: Octavio Nieto-Taladriz Garcia (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Ingeniería Electrónica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)