Measurement of a density profile of a hot-electron plasma in RT-1 with three-chord interferometry

H. Saitoh, Y. Yano, Z. Yoshida, M. Nishiura, J. Morikawa, Y. Kawazura, T. Nogami, M. Yamasaki

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The electron density profile of a plasma in a magnetospheric dipole field configuration was measured with a multi-chord interferometry including a relativistic correction. In order to improve the accuracy of density reconstruction, a 75 GHz interferometer was installed at a vertical chord of the Ring Trap 1 (RT-1) device in addition to previously installed ones at tangential and another vertical chords. The density profile was calculated by using the data of three-chord interferometry including relativistic effects for a plasma consisting of hot and cold electrons generated by electron cyclotron resonance heating (ECH). The results clearly showed the effects of density peaking and magnetic mirror trapping in a strongly inhomogeneous dipole magnetic field.

Original languageEnglish
Article number024503
JournalPhysics of Plasmas
Volume22
Issue number2
DOIs
Publication statusPublished - 2015 Feb 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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