Tomography as a promising diagnostic tool for plasma turbulence

A. Fujisawa, Y. Nagashima, S. Inagaki, T. Onchi, S. Ohshima, A. Shimizu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A system for plasma turbulence tomography has been developed in a linear cylindrical plasma as a prototype with aiming at future application on toroidal plasma of higher temperature. This paper describes the diagnostic system in both aspects of the soft- and hardware, and reports the first results of tomographic reconstruction that can successfully produce local emission and its fluctuations. In the reconstruction process, two dimensional view of plasma is obtained for approximately 0.6 ms in every sampling time of 1 μs using parallel processing of 120 cores with 10 personal computers. The results include the steady state analysis of local fluctuation power spectra using fast Fourier transform, analysis of temporal behavior of fluctuation power spectra with wavelet transform, and analyses of the structural deformation or pattern of local plasma emission, demonstrating that the success of tomography as a promising diagnostic tool for plasma turbulence.

Original languageEnglish
Article number025005
JournalPlasma Physics and Controlled Fusion
Volume58
Issue number2
DOIs
Publication statusPublished - Jan 11 2016

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Plasma turbulence
Plasma diagnostics
plasma turbulence
Tomography
tomography
Plasmas
power spectra
Power spectrum
cylindrical plasmas
toroidal plasmas
personal computers
wavelet analysis
hardware
sampling
prototypes
Personal computers
Fast Fourier transforms
Wavelet transforms
computer programs
Sampling

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Tomography as a promising diagnostic tool for plasma turbulence. / Fujisawa, A.; Nagashima, Y.; Inagaki, S.; Onchi, T.; Ohshima, S.; Shimizu, A.

In: Plasma Physics and Controlled Fusion, Vol. 58, No. 2, 025005, 11.01.2016.

Research output: Contribution to journalArticle

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