Terrestrial gamma flashes at ground level - TETRA-II
An upgraded version of the TGF and Energetic Thunderstorm Rooftop Array (TETRA-II) consists of an array of BGO scintillators to detect bursts of gamma rays from thunderstorms at ground level in four separate locations: the campus of the University of Puerto Rico at Utuado; the campus of Louisiana State University in Baton Rouge, Louisiana; the Severe Weather Institute and Radar & Lightning Laboratories in Huntsville, Alabama; and the Centro Nacional de Metrologia de Panama (CENAMEP) in Panama City, Panama. TETRA-II began operation in May 2016. The original TETRA-I array of NaI scintillators at Louisiana State University detected 37 millisecond-scale bursts of gamma rays at energies 50 keV-2 MeV associated with nearby (< 8 km) thunderstorms. When TETRA-II is fully operational, it will have approximately an order of magnitude greater sensitivity than TETRA-I. The ability to observe ground-level Terrestrial Gamma Flashes from close to the source allows a unique analysis of the storm cells producing these events. A brief description of the TETRA-I observations, a description of TETRA-II, and preliminary results will be presented.
Publication Source (Journal or Book title)
2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Pleshinger, D., & Cherry, M. (2017). Terrestrial gamma flashes at ground level - TETRA-II. 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, 2017-January, 1-2. https://doi.org/10.23919/URSIGASS.2017.8105196