Air ionization in a near-critical electric field |
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Authors: | A. F. Aleksandrov V. L. Bychkov L. P. Grachev I. I. Esakov A. Yu. Lomteva |
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Affiliation: | (1) Moscow State University, Vorob’evy gory, Moscow, 119899, Russia;(2) State Unitary Enterprise Moscow Radiotechnical Institute, Russian Academy of Sciences, Moscow, 117519, Russia |
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Abstract: | A set of experimental dependences of the air ionization effective rate on the electric field strength is presented. The concept of the critical breakdown field is discussed. It is indicated that experimental data are quantitatively inconsistent with analytical results based on this concept. This inconsistency is eliminated if the ionization balance takes into account not only dissociative adhesion of electrons to oxygen molecules but also their detachment from the molecules that gained a charge during the charge exchange process. Based on the results obtained, a new physical interpretation of the critical field is suggested. A formula for the effective rate of air ionization in near-critical fields is derived. |
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