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Radio frequency resonator structure and diagnostic measurements for a laboratory simulation of Auroral Kilometric Radiation

Ronald, K. and Speirs, David and McConville, S.L. and Phelps, A.D.R. and Robertson, C.W. and Whyte, C.G. and He, W. and Gillespie, K.M. and Bingham, Robert (2008) Radio frequency resonator structure and diagnostic measurements for a laboratory simulation of Auroral Kilometric Radiation. Physics of Plasmas, 15 (5). 056503. ISSN 1070-664X

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Abstract

Auroral Kilometric Radiation is emitted from regions of depleted plasma density in the Earth's polar magnetosphere. The radiation frequency is close to the local electron cyclotron frequency, polarized in the X-mode with an efficiency of ∼ 1%, with power up to 1 GW. Kinetic analysis of the instability in the descending auroral flux indicated that the phenomena scaled with the cyclotron frequency. Therefore, an experimental reproduction of the auroral geometry has been created scaled to laboratory dimensions by raising the radiation frequency to the microwave range. The experiment transports a 75-85 keV electron beam through a region of increasing magnetic flux density, with a mirror ratio of up to 30. The experiments measured the mode, spectrum, power, and conversion efficiency of the emitted radiation as a function of the mirror ratio in two resonance regimes, with frequencies of 4.42 and 11.7 GHz. The microwave diagnostics and measurements will be presented in this paper.

Item type: Article
ID code: 18132
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: auroral kilometric radiation, radiation frequency, electron cyclotron frequency, magnetized plasmas, Plasma physics. Ionized gases, Condensed Matter Physics
Subjects: Science > Physics > Plasma physics. Ionized gases
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 21 Apr 2010 18:24
    Last modified: 03 Jul 2014 16:09
    URI: http://strathprints.strath.ac.uk/id/eprint/18132

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