Spatially resolved transport data for electrons in gases: Definition, interpretation and calculation

The spatiotemporal evolution of electron swarms in the presence of electric and magnetic fields is investigated to facilitate understanding temporal and spatial non-locality in low-temperature plasmas. Using two independent techniques, a multi-term solution of Boltzmann’s equation and a Monte Carlo...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2012-05, Vol.279, p.84-91
Main Authors: Dujko, S., White, R.D., Raspopović, Z.M., Petrović, Z.Lj
Format: Article
Language:English
Subjects:
Boltzmann equation
Computer simulation
Electron swarms
Ionization
Magnetic fields
Mathematical analysis
Monte Carlo simulation
Plasmas
Strength
Transport properties
Yield strength
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Summary:The spatiotemporal evolution of electron swarms in the presence of electric and magnetic fields is investigated to facilitate understanding temporal and spatial non-locality in low-temperature plasmas. Using two independent techniques, a multi-term solution of Boltzmann’s equation and a Monte Carlo simulation technique, the synergism of an applied magnetic field and non-conservative collisions (ionization and/or electron attachment) is demonstrated as a means to control the non-locality of relaxation processes. In particular, oscillatory features in the spatial and temporal profiles are demonstrated, and shown to be enhanced or suppressed through the magnetic field strength, the angle between the electric and magnetic fields, and the degree of ionization. Finally we discuss the impact of field configurations and strengths on the transport properties, highlighting the distinctions in the measured transport properties between various experimental configurations when non-conservative processes are present.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2011.10.067