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A mechanism for increased fluxes of high energy particles detected inThunderstorm Ground Enhancements (TGEs) is suggested. When the electric fieldEambient at the ground beneath thunderstorms reaches modest magnitudes (6 -12kV/m), corona discharge occurs from the tips of some grounded conducting pointyobjects (GCPOs). Past theory and modeling of prolate semi-ellipsoidal GCPOssuggest the corona threshold value for free electron availability via seedelectron detachment is E = 67 V/m/Pa at the tip. The field enhancement,Etip/Eambient, at the GCPO tip depends only on its length:tip radius ofcurvature ratio. Thus, Etip at all GCPOs is substantially enhanced by Eambient,whether or not they are in corona. Cosmic ray electrons striking these pointytips will gain MeV energies. These high energy electrons may be detected withinstrumentation located nearby, or they may produce gamma rays viabremsstrahlung within the tips before being detected, thereby contributing toTGEs.

The role of grounded conducting pointy objects during Thunderstorm Ground Enhancements (TGEs)