Acoustical effects in a neon glow discharge
Carretta, Albert A.
Moore, William N.
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The pressure oscillations accompanying the moving striations in the positive column region of a neon filled discharge tube were observed using a specially constructed and calibrated condenser microphone probe. During stable discharge conditions when the moving striations could be observed optically, pressure amplitudes measured 2 were between 0.02 and 0.2 dynes/cm , depending upon ambient pressure and discharge current, with a frequency which was always at the repetition rate for the striations. Frequency was observed to be a function of pressure and current. For any given condition of pressure and current, only one frequency was observed, suggesting excitation of a "normal mode". A theory to explain such a "normal mode" excitation in the discharge is postulated.
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