TETRA observation of gamma-rays at ground level associated with nearby thunderstorms
TETRA observation of gamma-rays at ground level associated with nearby thunderstorms
复制标题
与附近雷暴相关的地面伽玛射线的 TETRA 观测
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Wefel
中科院分区：
文献类型：
--
作者：
R. Ringuette;G. Case;M. Cherry;D. Granger;T. G. Guzik;M. Stewart;J. Wefel
地球伽马射线闪光（TGFs）-来自地球雷暴的电子，正电子和高能光子的非常短，强烈的爆发-已经被卫星仪器探测到。TGF和能量雷暴屋顶阵列（TETRA）是路易斯安那州立大学的一个NaI（Tl）发射器阵列，现在已经被用来探测地面上50 keV到2 MeV以上的伽马射线的类似爆发。经过2.6年的观测，已探测到24个持续时间为0.02-4.2 ms的与附近闪电有关的事件，其中三个事件由相距约1000 m的探测器观测到。其中9起事件发生在6 ms和5 km的负极性云对地雷击范围内，测量电流超过20 kA。这里报告的事件构成了第一个在地面上观察到的TGFs目录，靠近加速站点。
Terrestrial gamma‐ray flashes (TGFs)—very short, intense bursts of electrons, positrons, and energetic photons originating from terrestrial thunderstorms—have been detected with satellite instruments. TGF and Energetic Thunderstorm Rooftop Array (TETRA), an array of NaI(Tl) scintillators at Louisiana State University, has now been used to detect similar bursts of 50 keV to over 2 MeV gamma‐rays at ground level. After 2.6 years of observation, 24 events with durations 0.02–4.2 ms have been detected associated with nearby lightning, three of them coincident events observed by detectors separated by ~1000 m. Nine of the events occurred within 6 ms and 5 km of negative polarity cloud‐to‐ground lightning strokes with measured currents in excess of 20 kA. The events reported here constitute the first catalog of TGFs observed at ground level in close proximity to the acceleration site.