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

作者：Saitoh H^*; Yano Y; Yoshida Z; Nishiura M; Morikawa J; Kawazura Y; Nogami T; Yamasaki M

来源：Physics of Plasmas, 2015, 22(2): 024503.

DOI：10.1063/1.4908550

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.

• 出版日期2015-2