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Choi, EunMi
THz Vacuum Electronics and Electrodynamics
Research Interests
  • High power millimeter-wave/THz wave, vacuum electronics, plasma breakdown, electron beams, electromagnetics, microwave/RF engineering

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Observation of large arrays of plasma filaments in air breakdown by 1.5-MW 110-GHz gyrotron pulses

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Title
Observation of large arrays of plasma filaments in air breakdown by 1.5-MW 110-GHz gyrotron pulses
Author
Hidaka, YoshiteruChoi, EunMiMastovsky, I.Shapiro, M. A.Sirigiri, J. R.Temkin, R. J.
Issue Date
2008-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.100, no.3, pp.1 - 4
Abstract
We report the observation of two-dimensional plasma filamentary arrays with more than 100 elements generated during breakdown of air at atmospheric pressure by a focused Gaussian beam from a 1.5-MW, 110-GHz gyrotron operating in 3-mu s pulses. Each element is a plasma filament elongated in the electric field direction and regularly spaced about one-quarter wavelength apart in the plane perpendicular to the electric field. The development of the array is explained as a result of diffraction of the beam around the filaments, leading to the sequential generation of high intensity spots, at which new filaments are created, about a quarter wavelength upstream from each existing filament. Electromagnetic wave simulations corroborate this explanation and show very good correlation to the observed pattern of filaments.
URI
https://scholarworks.unist.ac.kr/handle/201301/10878
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=38549181564
DOI
10.1103/PhysRevLett.100.035003
ISSN
0031-9007
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