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Naslov:Insight Into Lightning Initiation via Downward Terrestrial Gamma-ray Flash Observations at Telescope Array
Avtorji:ID Remington, J. (Avtor)
ID Lundquist, Jon Paul (Avtor), et al.
Datoteke:.pdf ICRC2021_345.pdf (2,76 MB)
MD5: D49B5F37A964976D818C0BA7D95E3258
 
URL https://pos.sissa.it/395/345/
 
URL https://pos.sissa.it/395/345/pdf
 
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija:UNG - Univerza v Novi Gorici
Opis:Due to the difficulty of direct measurement of the thunderstorm environment, in particular the electric field strengths, the initial stages of lightning breakdown remain mysterious. The 1994 discovery of Terrestrial Gamma-ray Flashes (TGFs) and their implications for megaVolt potentials within thunderclouds has proved to be a valuable source of information about the breakdown process. The Telescope Array Surface Detector (TASD) --- a 700 km^2 scintillator array in Western Utah, U.S.A --- coupled with a lightning mapping array, fast sferic (field change) sensor and broadband interferometer, has provided unique insight into the properties of this energetic radiation and of lightning initiation in general. In particular, microsecond-scale timing comparisons have clearly established that downward TGFs occur during strong initial breakdown pulses (IBPs) of downward negative cloud-to-ground and intracloud flashes. In turn, the IBPs are produced by streamer-based fast negative breakdown. Investigations into downward TGFs with the TASD have significantly evolved with recent upgrades to lightning instrumentation. A second state-of-the-art broadband interferometer allows high-resolution stereo observation of lightning development. A high-speed optical video camera, set to be deployed in Spring 2021, will allow simultaneous observation of the visual component of lightning responsible for TGF production. Finally, a suite of ground based static electric field mills will provide new information on the large-scale properties of the thunderstorms in which downward TGFs arise. In this talk, we present the most recent TGF observations from the Telescope Array.
Ključne besede:Telescope Array, ground array, ultra-high energy, cosmic rays, photons, terrestrial gamma-ray flashes, gamma-rays, lightning
Status publikacije:Objavljeno
Leto izida:2022
PID:20.500.12556/RUNG-8492 Novo okno
COBISS.SI-ID:166499843 Novo okno
DOI:10.22323/1.395.0345 Novo okno
NUK URN:URN:SI:UNG:REP:L96YHOFJ
Datum objave v RUNG:02.10.2023
Število ogledov:782
Število prenosov:6
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Gradivo je del monografije

Naslov:37th International Cosmic Ray Conference : ICRC2023
Kraj izida:Trieste, Italy
Založnik:Proceedings of Science
Leto izida:2022

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