Coherence-imaging spectroscopy for 2D distribution of ion temperature and flow velocity in a laboratory magnetosphere

K Nakamura; M Nishiura; N Takahashi; Z Yoshida; N Kenmochi; T Sugata; S Katsura; J Howard

doi:10.1063/1.5037124

Coherence-imaging spectroscopy for 2D distribution of ion temperature and flow velocity in a laboratory magnetosphere

Rev Sci Instrum. 2018 Oct;89(10):10D133. doi: 10.1063/1.5037124.

Authors

K Nakamura¹, M Nishiura¹, N Takahashi¹, Z Yoshida¹, N Kenmochi¹, T Sugata¹, S Katsura¹, J Howard²

Affiliations

¹ Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan.
² The Australian National University, Acton, ACT 2601, Australia.

PMID: 30399835
DOI: 10.1063/1.5037124

Abstract

A coherence-imaging spectroscopy (CIS) technique was developed to investigate plasma confinement in a dipole system that imitates a planetary magnetosphere. Optical interference generated using birefringent crystals enables two-dimensional Doppler spectroscopy to measure ion temperatures and flow velocities in plasmas. CIS covers the entire dynamics of the pole areas as well as of the core and edge areas on a dipole confinement device. The two-dimensional visualization of these quantities in the magnetospheric-plasma device RT-1 was demonstrated using CIS.