Ion densities in an ac metal halide arc discharge

Details Ion densities in an ac metal halide arc discharge Ion densities in an ac metal halide arc discharge

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apphl..82..700k&link_type=abstract

Applied Physics Letters, Volume 82, Issue 5, id. 700 (2003).

Physics

4

Arcs, Sparks, Lightning, Atmospheric Electricity, Plasma Properties, Thermodynamics Of Plasmas, Optical Measurements

Scientific paper

The time-dependent density of mercury ions, sodium ions, and electrons is determined experimentally at the center of a high-pressure mercury discharge with sodium iodide as additive operated on alternating current within transparent quartz tube. The technique used is based on emission lines, and is independent of thermodynamic equilibrium assumptions. The results show that at sinusoidal low-frequency excitation the electrons come mainly from mercury ionization, the electron and mercury-ion densities vary strongly within the ac cycle, whereas the modulation of the sodium-ion density is significantly less pronounced. Results are also obtained assuming thermodynamic equilibrium and compared with the initial ones.

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