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Title: Kinetics of Energetic O{sup −} Ions in the Discharge Plasmas of Water Vapor and H{sub 2}O-Containing Mixtures

Abstract

The process of relaxation of energetic O{sup –} ions formed via dissociative attachment of electrons to molecules in the discharge plasmas of water vapor and H{sub 2}O: O{sub 2} mixtures in a strong electric field is studied by the Monte Carlo method. The probability of energetic ions being involved in threshold ion–molecular processes is calculated. It is shown that several percent of energetic O{sup –} ions formed via electron attachment to H{sub 2}O molecules in the course of plasma thermalization transform into OH{sup –} ions via charge exchange or are destroyed with the formation of free electrons. The probabilities of charge exchange of O{sup –} ions and electron detachment from them increase significantly (up to 90%) when O{sup –} ions are formed via electron attachment to O{sub 2} molecules in water vapor with an oxygen additive. This effect decreases with increasing oxygen fraction in the mixture but remains appreciable even when the fraction of H{sub 2}O molecules in the H{sub 2}O: O{sub 2} mixture does not exceed several percent.

Authors:
;  [1]
  1. Moscow Institute of Physics and Technology (Russian Federation)
Publication Date:
OSTI Identifier:
22763211
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 44; Journal Issue: 10; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHARGE EXCHANGE; ELECTRIC FIELDS; ELECTRON ATTACHMENT; ELECTRON DETACHMENT; ELECTRONS; HYDROXIDES; MONTE CARLO METHOD; OXYGEN; PLASMA; TAIL IONS; THERMALIZATION; WATER VAPOR

Citation Formats

Ponomarev, A. A., and Aleksandrov, N. L., E-mail: nick-aleksandrov@mail.ru. Kinetics of Energetic O{sup −} Ions in the Discharge Plasmas of Water Vapor and H{sub 2}O-Containing Mixtures. United States: N. p., 2018. Web. doi:10.1134/S1063780X18100100.
Ponomarev, A. A., & Aleksandrov, N. L., E-mail: nick-aleksandrov@mail.ru. Kinetics of Energetic O{sup −} Ions in the Discharge Plasmas of Water Vapor and H{sub 2}O-Containing Mixtures. United States. doi:10.1134/S1063780X18100100.
Ponomarev, A. A., and Aleksandrov, N. L., E-mail: nick-aleksandrov@mail.ru. Mon . "Kinetics of Energetic O{sup −} Ions in the Discharge Plasmas of Water Vapor and H{sub 2}O-Containing Mixtures". United States. doi:10.1134/S1063780X18100100.
@article{osti_22763211,
title = {Kinetics of Energetic O{sup −} Ions in the Discharge Plasmas of Water Vapor and H{sub 2}O-Containing Mixtures},
author = {Ponomarev, A. A. and Aleksandrov, N. L., E-mail: nick-aleksandrov@mail.ru},
abstractNote = {The process of relaxation of energetic O{sup –} ions formed via dissociative attachment of electrons to molecules in the discharge plasmas of water vapor and H{sub 2}O: O{sub 2} mixtures in a strong electric field is studied by the Monte Carlo method. The probability of energetic ions being involved in threshold ion–molecular processes is calculated. It is shown that several percent of energetic O{sup –} ions formed via electron attachment to H{sub 2}O molecules in the course of plasma thermalization transform into OH{sup –} ions via charge exchange or are destroyed with the formation of free electrons. The probabilities of charge exchange of O{sup –} ions and electron detachment from them increase significantly (up to 90%) when O{sup –} ions are formed via electron attachment to O{sub 2} molecules in water vapor with an oxygen additive. This effect decreases with increasing oxygen fraction in the mixture but remains appreciable even when the fraction of H{sub 2}O molecules in the H{sub 2}O: O{sub 2} mixture does not exceed several percent.},
doi = {10.1134/S1063780X18100100},
journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 10,
volume = 44,
place = {United States},
year = {2018},
month = {10}
}