Abstract
The applicability of Stark broadening of hydrogen atomic emission as a probe of electron concentrations in the high voltage spark discharge is critically evaluated. Instrumental limitations, broadening theory applicability and limitations due to discharge fluctuations are discussed. Comparison to literature time resolved, spatially resolved data indicates those regimes in which accurate electron concentration measurements can not be made using this technique. Suggestions are made for improvements in instrumentation which would allow faster throughput and more insight into discharge processes using Stark broadening as a diagnostic.
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