TY - JOUR
T1 - Proposal of Analysis Method for Pattern Recognition of Two-Dimensional Structure of Plasma
AU - KOBAYASHI, Taiki
AU - FUJISAWA, Akihide
AU - NAGASHIMA, Yoshihiko
AU - MOON, Chanho
AU - NISHIMURA, Daiki
AU - YAMASAKI, Kotaro
AU - INAGAKI, Shigeru
N1 - Funding Information:
This work was supported by JSPS KAKENHI JP17H06089, 15H02335, JP19K23426, 21K13898, and by NIFS (17KOCH002 & 21KLPH050).
Publisher Copyright:
© 2021 The Japan Society of Plasma Science and Nuclear Fusion Research. All Rights Reserved.
PY - 2021
Y1 - 2021
N2 - Two-dimensional measurement becomes active to explore physics of plasma structure and dynamics. The paper proposes a set of new methods using the Fourier-Bessel function series expansion to characterize the twodimensional images for plasma and illustrates an example of its application to a phenomenon of quasi-periodic oscillations observed with tomography in a linear plasma device PANTA. The analysis provides quantitative relations between the coherent structure and residual random fluctuations of the oscillations. The results suggest that similarity between their spatial patterns should be increased in the phase when both amplitudes become stronger.
AB - Two-dimensional measurement becomes active to explore physics of plasma structure and dynamics. The paper proposes a set of new methods using the Fourier-Bessel function series expansion to characterize the twodimensional images for plasma and illustrates an example of its application to a phenomenon of quasi-periodic oscillations observed with tomography in a linear plasma device PANTA. The analysis provides quantitative relations between the coherent structure and residual random fluctuations of the oscillations. The results suggest that similarity between their spatial patterns should be increased in the phase when both amplitudes become stronger.
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U2 - 10.1585/pfr.16.1201082
DO - 10.1585/pfr.16.1201082
M3 - Article
AN - SCOPUS:85110689065
SN - 1880-6821
VL - 16
SP - 1
EP - 3
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
ER -