TY - JOUR
T1 - Method for estimating the frequency-wavenumber resolved power spectrum density using the maximum entropy method for limited spatial points
AU - Kobayashi, T.
AU - Nishizawa, T.
AU - Sasaki, M.
AU - Yoshinuma, M.
AU - Ida, K.
N1 - Publisher Copyright:
© 2021 IOP Publishing Ltd.
PY - 2021/4
Y1 - 2021/4
N2 - A combination of the Fourier transform and the maximum entropy method for estimating the frequency-wavenumber resolved power spectrum density is proposed. After illustrating the physical insight of the maximum entropy method by using synthetic test data, capability of the proposed method is tested using numerical simulation data. The method is also applied to experimental data obtained by the beam emission spectroscopy in the Large Helical Device. All of those examinations show that the proposed method provides more plausible results than conventional methods when the available spatial points are limited.
AB - A combination of the Fourier transform and the maximum entropy method for estimating the frequency-wavenumber resolved power spectrum density is proposed. After illustrating the physical insight of the maximum entropy method by using synthetic test data, capability of the proposed method is tested using numerical simulation data. The method is also applied to experimental data obtained by the beam emission spectroscopy in the Large Helical Device. All of those examinations show that the proposed method provides more plausible results than conventional methods when the available spatial points are limited.
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U2 - 10.1088/1361-6587/abe024
DO - 10.1088/1361-6587/abe024
M3 - Article
AN - SCOPUS:85101799253
SN - 0741-3335
VL - 63
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
IS - 4
M1 - 045011
ER -