Simulation of Electromagnetic Wave Propagation in a Magnetospheric Plasma

• MORI Takahiro

  Graduate School of Frontier Sciences, The University of Tokyo

• NISHIURA Masaki

  Graduate School of Frontier Sciences, The University of Tokyo National Institute for Fusion Science

• YOSHIDA Zensho

  Graduate School of Frontier Sciences, The University of Tokyo

• KENMOCHI Naoki

  Graduate School of Frontier Sciences, The University of Tokyo

• KATSURA Shotaro

  Graduate School of Frontier Sciences, The University of Tokyo

• NAKAMURA Kaori

  Graduate School of Frontier Sciences, The University of Tokyo

• YOKOTA Yuuki

  Graduate School of Frontier Sciences, The University of Tokyo

• TSUJIMURA Toru I.

  National Institute for Fusion Science

• KUBO Shin

  National Institute for Fusion Science

Abstract

The Ring Trap 1 (RT-1) device creates a laboratory magnetosphere, that is motivated by the Jovian magnetosphere, which contains self-organized, high-beta plasmas. In the RT-1 plasmas, the density limit for 8.2 GHz electron cyclotron heating (ECH) occurs at the electron densities 8.0×10¹⁷ m⁻³ and for 2.45GHz ECH, 1.6×10¹⁷ m⁻³. We have used full-wave simulations to study the propagation and absorption of electromagnetic waves in the RT-1 plasmas in an effort to understand the observed density limits as well as the over-dense state in which the actual density exceeds the cutoff density of the magnetospheric plasma. The simulation results cannot explain the experimentally observed over-dense states and density limits in the view of the power absorption. We discuss possible reasons for the gap between the experiments and the simulation results.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 14 (0), 3401134-3401134, 2019-08-14

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• magnetospheric plasma
• ECH
• electron cyclotron wave
• electric field
• over dense plasma
• electromagnetic wave propagation

Details

• CRID: 1390001277347408640
• NII Article ID: 130007704082
• NII Book ID: AA12346675
• DOI: 10.1585/pfr.14.3401134
• ISSN: 18806821
• HANDLE: 10655/00013230
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/11298
• Web Site: https://www.jstage.jst.go.jp/article/pfr/14/0/14_3401134/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed