[M-IS18] [JJ] 大気電気学

[MIS18-06] Ground observation of thermal neutrons from Terrestrial Gamma-ray Flash above wind turbine

*Bowers Gregory¹、Smith David¹、Kamogawa Masashi²、Takahashi Shusa²、Ishikawa Akiko²、Heckman Stan³、Stock Michael³、Cummer Steve⁴、Wang Daohong⁵、Hobara Yasuhide⁶、Kawasaki Zen⁷ (1.University of California Santa Cruz、2.Tokyo Gakugei University、3.Earth Networks、4.Duke University、5.GIFU University、6.The University of Electro-Communications、7.Osaka University )

キーワード：Lightning, Terrestrial Gamma-Ray Flash, TGF, Radiation, Neutron, Wind Turbine

During a thunderstorm on December 3rd, 2015, coincident with an upward leader originating from a lightning protection tower next to the wind turbine in Uchinada, the Gamma-ray Observations During Overhead Thunderstorms (GODOT) instrument observed a large, ~100ms duration, flux of radiation with a spectral signature characteristic of thermal neutron production. We will present our observations and show comparisons to monte-carlo simulations, proposing that we have the observed the first neutron glow from a Terrestrial Gamma-ray Flash, produced by photonuclear reactions of gamma-rays with the air and ground molecules around the wind turbine.