Your query was: "AE13A-05"

HR: 14:40h
AN: AE13A-05
TI: Conditions for Production of Terrestral Gamma-Ray Flashes
AU: * Lehtinen, N G
EM: nleht@stanford.edu
AF: STAR Lab, Electrical Engineering, Stanford University, 350 Serra Mall, Stanford, CA 94305 United States
AU: Inan, U S
EM: inan@stanford.edu
AF: STAR Lab, Electrical Engineering, Stanford University, 350 Serra Mall, Stanford, CA 94305 United States
AB: Terrestrial gamma-ray flashes (TGFs) are the most energetic natural photon phenomena on Earth and have been a subject of keen interest since their accidental discovery by the Burst and Transient Source Experiment (BATSE) instrument on the Compton Gamma Ray Observatory (CGRO), which has observed a total of 76 flashes at an average rate of once per month. The new observations of hundreds of TGFs on the RHESSI spacecraft, with many tens of events observed per month, corresponding to a rate of >50 events per day globally, bring to the fore the need of theoretical studies of new TGF mechanisms. In this work, we study the TGF production by a combined action of the electromagnetic pulse (EMP) from a lightning return stroke and the post-discharge quasi-electrostatic (QES) field. We investigate various parameters necessary for the production of a detectable TGF, including the return stroke speed and maximum value, the charge removed by a continuing current in the positive cloud-to-ground (+CG) discharge, and the dependence on the pre-discharge atmosphere conductivity profile.
DE: 2423 Ionization processes (7823)
DE: 2427 Ionosphere/atmosphere interactions (0335)
DE: 2435 Ionospheric disturbances
DE: 2451 Particle acceleration
DE: 3324 Lightning
SC: Atmospheric and Space Electricity [AE]
MN: Fall Meeting 2005