Kinetic coefficients in a cool helium plasma at high E/N
It is important to make a detailed study of the characteristics of electron motion in gases in steady electric fields not only for practical purposes but also for theoretical ones. On comparing the observed and calculated transport coefficients, one can adjust the cross sections for the elementary processes of electron collision with atoms and molecules. Here we calculate the electron transport coefficients for helium in the range 10/sup -16/ V. cm/sup 2/ less than or equal to E/N less than or equal to 30.10/sup -16/ V.cm/sup 2/ (E is the electric field strength and N is the number of particles in unit volume), i.e., for conditions where one has to allow for the formation of new (secondary) electrons during ionization. The calculation is based on numerical solution of a modified kinetic Boltzmann equation for the electrons, whose form is determined by the type of experiment. We examine the effebTs of the secondary-electron energy distribution on the results.
- OSTI ID:
- 6087919
- Journal Information:
- High Temp. (Engl. Transl.); (United States), Journal Name: High Temp. (Engl. Transl.); (United States) Vol. 22:6; ISSN HITEA
- Country of Publication:
- United States
- Language:
- English
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ALGORITHMS
ATOM COLLISIONS
BOLTZMANN EQUATION
CHARGED-PARTICLE TRANSPORT
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL EQUATIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
EMISSION
EQUATIONS
FLUIDS
GASES
HELIUM
IONIZATION
KINETICS
MATHEMATICAL LOGIC
MOLECULE COLLISIONS
NONMETALS
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
RADIATION TRANSPORT
RARE GASES
SECONDARY EMISSION