Abstract
The applicability of the high-frequency Stark effect in the diagnostics of turbulent plasmas is demonstrated by measurements of He I line profiles (4/sup 1/D-2/sup 1/P) in a turbulent linear discharge. The existence of electron plasma waves with field strengths of 6--9 kV/cm is confirmed spectroscopically. Competing effects: e.g., the emission of molecular lines: are discussed in detail and are shown to be negligible under our experimental conditions.
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