Modeling the relativistic runaway electron avalanche and the feedback mechanism with GEANT4.This paper presents the first study that uses the GEometry ANd Tracking 4 (GEANT4) toolkit to do quantitative comparisons with other modeling results related to the production of terrestrial gamma ray flashes and high-energy particle emission from thunderstorms.  This is important to validate GEANT4 as a tool to model RREAs and feedback in homogeneous electric fields.  In addition, we present comparisons of GEANT4 simulations performed with a "standard" and a "low-energy" physics list both validated in the 1 keV to 100 GeV energy range.  This comparison shows that the choice of physics list used in GEANT4 simulations has a significant effect on the results.


 Testing the feedback mechanism with GEANT4Validating the GEANT4 programming toolkitStudy the ratio of bremsstrahlung photons to electrons at TGF source altitude.
GEANT4
Modeling the relativistic runaway electron avalanche and the feedback mechanism with GEANT4.This paper presents the first study that uses the GEometry ANd Tracking 4 (GEANT4) toolkit to do quantitative comparisons with other modeling results related to the production of terrestrial gamma ray flashes and high-energy particle emission from thunderstorms.  This is important to validate GEANT4 as a tool to model RREAs and feedback in homogeneous electric fields.  In addition, we present comparisons of GEANT4 simulations performed with a "standard" and a "low-energy" physics list both validated in the 1 keV to 100 GeV energy range.  This comparison shows that the choice of physics list used in GEANT4 simulations has a significant effect on the results.


 Testing the feedback mechanism with GEANT4Validating the GEANT4 programming toolkitStudy the ratio of bremsstrahlung photons to electrons at TGF source altitude.
GEANT4
Modeling the relativistic runaway electron avalanche and the feedback mechanism with GEANT4.This paper presents the first study that uses the GEometry ANd Tracking 4 (GEANT4) toolkit to do quantitative comparisons with other modeling results related to the production of terrestrial gamma ray flashes and high-energy particle emission from thunderstorms.  This is important to validate GEANT4 as a tool to model RREAs and feedback in homogeneous electric fields.  In addition, we present comparisons of GEANT4 simulations performed with a "standard" and a "low-energy" physics list both validated in the 1 keV to 100 GeV energy range.  This comparison shows that the choice of physics list used in GEANT4 simulations has a significant effect on the results.


 Testing the feedback mechanism with GEANT4Validating the GEANT4 programming toolkitStudy the ratio of bremsstrahlung photons to electrons at TGF source altitude.
GEANT4