Observation of large arrays of plasma filaments in air breakdown by 1.5-MW 110-GHz gyrotron pulses.
Observation of large arrays of plasma filaments in air breakdown by 1.5-MW 110-GHz gyrotron pulses.
复制标题
DOI：
10.1103/physrevlett.100.035003
复制
发表时间：
2008-01
影响因子：
8.6
通讯作者：
Y. Hidaka;E. Choi;I. Mastovsky;M. Shapiro;J. Sirigiri;R. Temkin
中科院分区：
文献类型：
--
作者：
Y. Hidaka;E. Choi;I. Mastovsky;M. Shapiro;J. Sirigiri;R. Temkin
本文报道了在大气压下用1.5MW、110GHz回旋管的聚焦高斯光束击穿空气时产生的具有100多个元素的二维等离子体阵列的观测结果。每个元件是在电场方向上伸长的等离子体细丝，并且在垂直于电场的平面中规则地间隔开约四分之一波长。的阵列的发展被解释为周围的灯丝的光束的衍射的结果，导致高强度点的顺序生成，在其中创建新的灯丝，从每个现有的灯丝上游约四分之一波长。电磁波模拟证实了这一解释，并显示出非常好的相关性观察到的模式的细丝。
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-micros 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.