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.
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February 2015
Brief Report|
February 19 2015
Measurement of a density profile of a hot-electron plasma in RT-1 with three-chord interferometry
H. Saitoh;
H. Saitoh
a)
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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Y. Yano;
Y. Yano
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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Z. Yoshida;
Z. Yoshida
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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M. Nishiura;
M. Nishiura
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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J. Morikawa;
J. Morikawa
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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Y. Kawazura;
Y. Kawazura
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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T. Nogami;
T. Nogami
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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M. Yamasaki
M. Yamasaki
Graduate School of Frontier Sciences,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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a)
Present address: Max Planck Institute for Plasma Physics, Boltzmannstraße 2, D-85748 Garching, Germany.
Phys. Plasmas 22, 024503 (2015)
Article history
Received:
December 25 2014
Accepted:
February 03 2015
Citation
H. Saitoh, Y. Yano, Z. Yoshida, M. Nishiura, J. Morikawa, Y. Kawazura, T. Nogami, M. Yamasaki; Measurement of a density profile of a hot-electron plasma in RT-1 with three-chord interferometry. Phys. Plasmas 1 February 2015; 22 (2): 024503. https://doi.org/10.1063/1.4908550
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