Conditions for the formation and parameters of anodic plasma in a low-pressure arc discharge
The formation of plasma in the anodic region of a low-pressure arc discharge is analyzed and its parameters are determined based on experimental and numerical modeling. It is shown that at pressures of 0.01-0.1 Pa plasma electrons make the greatest contribution to the ionization process. These electrons are formed as a result of the relaxation of the flux of high-energy electrons accompanying the development of collective interaction processes in the region under study; this is the basic reason for the sharp growth in the electron density as the gas pressure increases and the previously not observed nonmonotonic nature of the pressure dependence of the plasma potential. Analogous dependences are also observed when the geometric dimensions of the electrode system are changed. The results of the calculation agree satisfactorily with experiment.
- OSTI ID:
- 6450952
- Journal Information:
- High Temp. (Engl. Transl.); (United States), Vol. 25:5; Other Information: Translated from Teplofiz. Vys. Temp.; 25: No. 5, 880-886(Sep-Oct 1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
ANODES
PLASMA PRODUCTION
ELECTRIC ARCS
GASES
IONIZATION
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON DENSITY
ELECTRON EMISSION
ELECTRON TEMPERATURE
ENERGY SPECTRA
ION DENSITY
ION SOURCES
MATHEMATICAL MODELS
PLASMA SIMULATION
PRESSURE DEPENDENCE
BEAMS
COLLISIONS
CURRENTS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRODES
EMISSION
FLUIDS
LEPTON BEAMS
PARTICLE BEAMS
SIMULATION
SPECTRA
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions