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Title: Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements

Abstract

A miniature microwave plasma source employing both radial and axial magnetic fields for plasma confinement has been developed for micro-propulsion applications. Plasma is initiated by launching microwaves via a short monopole antenna to circumvent geometrical cutoff limitations. The amplitude and phase of the forward and reflected microwave power is measured to obtain the complex reflection coefficient from which the equivalent impedance of the plasma source is determined. Effect of critical plasma density condition is reflected in the measurements and provides insight into the working of the miniature plasma source. A basic impedance calculation model is developed to help in understanding the experimental observations. From experiment and theory, it is seen that the equivalent impedance magnitude is controlled by the coaxial discharge boundary conditions, and the phase is influenced primarily by the plasma immersed antenna impedance.

Authors:
; ; ;  [1]
  1. Department of Advanced Energy Engineering Science, Kyushu University, Kasuga 816-8580 (Japan)
Publication Date:
OSTI Identifier:
22303661
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; ANTENNAS; IMPEDANCE; MAGNETIC FIELDS; MICROWAVE RADIATION; MULTIPOLAR CONFIGURATIONS; PLASMA CONFINEMENT; PLASMA DENSITY; REFLECTION

Citation Formats

Dey, Indranuj, E-mail: indranuj@aees.kyushu-u.ac.jp, Toyoda, Yuji, Yamamoto, Naoji, and Nakashima, Hideki. Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements. United States: N. p., 2014. Web. doi:10.1063/1.4894476.
Dey, Indranuj, E-mail: indranuj@aees.kyushu-u.ac.jp, Toyoda, Yuji, Yamamoto, Naoji, & Nakashima, Hideki. Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements. United States. doi:10.1063/1.4894476.
Dey, Indranuj, E-mail: indranuj@aees.kyushu-u.ac.jp, Toyoda, Yuji, Yamamoto, Naoji, and Nakashima, Hideki. Mon . "Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements". United States. doi:10.1063/1.4894476.
@article{osti_22303661,
title = {Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements},
author = {Dey, Indranuj, E-mail: indranuj@aees.kyushu-u.ac.jp and Toyoda, Yuji and Yamamoto, Naoji and Nakashima, Hideki},
abstractNote = {A miniature microwave plasma source employing both radial and axial magnetic fields for plasma confinement has been developed for micro-propulsion applications. Plasma is initiated by launching microwaves via a short monopole antenna to circumvent geometrical cutoff limitations. The amplitude and phase of the forward and reflected microwave power is measured to obtain the complex reflection coefficient from which the equivalent impedance of the plasma source is determined. Effect of critical plasma density condition is reflected in the measurements and provides insight into the working of the miniature plasma source. A basic impedance calculation model is developed to help in understanding the experimental observations. From experiment and theory, it is seen that the equivalent impedance magnitude is controlled by the coaxial discharge boundary conditions, and the phase is influenced primarily by the plasma immersed antenna impedance.},
doi = {10.1063/1.4894476},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 21,
place = {United States},
year = {2014},
month = {9}
}