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Title: Global model analysis of negative ion generation in low-pressure inductively coupled hydrogen plasmas with bi-Maxwellian electron energy distributions

A global model was developed to investigate the densities of negative ions and the other species in a low-pressure inductively coupled hydrogen plasma with a bi-Maxwellian electron energy distribution. Compared to a Maxwellian plasma, bi-Maxwellian plasmas have higher populations of low-energy electrons and highly vibrationally excited hydrogen molecules that are generated efficiently by high-energy electrons. This leads to a higher reaction rate of the dissociative electron attachment responsible for negative ion production. The model indicated that the bi-Maxwellian electron energy distribution at low pressures is favorable for the creation of negative ions. In addition, the electron temperature, electron density, and negative ion density calculated using the model were compared with the experimental data. In the low-pressure regime, the model results of the bi-Maxwellian electron energy distributions agreed well quantitatively with the experimental measurements, unlike those of the assumed Maxwellian electron energy distributions that had discrepancies.
Authors:
; ; ; ; ;  [1]
  1. Department of Energy Systems Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22408254
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANIONS; BOLTZMANN STATISTICS; ELECTRON ATTACHMENT; ELECTRON DENSITY; ELECTRON SPECTRA; ELECTRON TEMPERATURE; ENERGY SPECTRA; EXCITATION; EXPERIMENTAL DATA; HYDROGEN; ION DENSITY; PLASMA; PRESSURE RANGE KILO PA; REACTION KINETICS