Development of Efficient FPGA-Based Multi-Channel Phase Meters for IR-Interferometers

Author

Esteban, Luis ; Sánchez, Miguel ; López, Juan Antonio ; Kornejew, Petra ; Hirsch, Matthias ; Nieto-Taladriz, Octavio

Author_Institution

CIEMAT, Madrid, Spain

Volume

58

Issue

4

fYear

2011

Firstpage

1562

Lastpage

1569

Abstract

Infrared (IR) interferometry is a method for measuring the line-electron density of fusion plasmas. The significant performance achieved by FPGAs in solving digital signal processing tasks advocates the use of this type of technology in two-color IR interferometers of modern stellarators, such as the TJ-II (Madrid, Spain) and the future W7-X (Greifswald, Germany). In this work the implementation of a line-average electron density measuring system in an FPGA device is described. Several optimizations for multichannel systems are detailed and test results from the TJ-II as well as from a W7-X prototype are presented.

Keywords

electromagnetic wave interferometers; field programmable gate arrays; phase meters; plasma diagnostics; FPGA-based multichannel phase meter; IR-interferometers; TJ-II; W7-X; fusion plasmas; line-electron density; Density measurement; Field programmable gate arrays; Interferometers; Particle beams; Phase measurement; Plasma measurements; Plasmas; FPGA; infrared interferometry; phase meter; real-time processing;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2011.2159739

Filename

5958638