Plasma and Fusion Research

Volume 18, 1202036 (2023)

Rapid Communications

Analysis of Turbulence Driven Particle Transport in PANTA by Using Multi-Field Singular Value Decomposition
Takumi KODAHARA, Makoto SASAKI, Yuichi KAWACHI1), Yuki JAJIMA, Tatsuya KOBAYASHI1), Takuma YAMADA2,3), Hiroyuki ARAKAWA4) and Akihide FUJISAWA2,5)
College of Industrial Technology, Nihon University, Narashino 274-0072, Japan
1)
National Institute for Fusion Science, Toki 509-5202, Japan
2)
Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
3)
Faculty of Arts and Science, Kyushu University, Fukuoka 819-0395, Japan
4)
Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
5)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
(Received 1 March 2023 / Accepted 27 March 2023 / Published 5 June 2023)

Abstract

Multi-field singular value decompositions (SVDs) is applied to turbulence obtained in a cylindrical magnetized plasma, PANTA. This method enables us to obtain the spatial mode structures with common temporal evolution of different physical quantities, such as the fluctuations of density and flows. Turbulence driven particle transport is evaluated by the method. It is shown that only the coupling of the same mode drives the transport, which stems from the orthogonality of the SVD. Thanks to this characteristics, the number of degrees of freedom which plays roles for the transport dynamics could be significantly reduced.

Keywords

magnetized plasma, data-driven method, singular value decomposition, drift wave, particle transport

DOI: 10.1585/pfr.18.1202036

Full Text

PDF format (155Kbytes) PDF Download

References

  • [1] T. Yamada et al., Nature Physics 4.9, 721 (2008).
  • [2] M. Sasaki et al., Plasma Phys. Control. Fusion 61.11, 112001 (2019).
  • [3] A. Kusaba et al., Jpn. J. Appl. Phys. 61.SA, SA1011 (2021).
  • [4] M. Sasaki et al., Plasma Phys. Control. Fusion 63.2, 025004 (2020).
  • [5] S. Maeyama et al., New J. Phys. 23.4, 043049 (2021).
  • [6] S. Inagaki et al., Scientific Reports 6.1, 1 (2016).
  • [7] T. Kobayashi et al., Plasma Fusion Res. 12, 1401019 (2017).
  • [8] G. Yatomi et al., submitted to Plasma Phys. Control. Fusion (2023).
  • [9] W. Horto, Reviews of Modern Physic 71.3, 735 (1999).