Acousto-convective relaxation oscillation in plasma lamp | Zendy

Seth Pree | Zendy; John P. Koulakis | Zendy; Alexander Thornton | Zendy; Seth Putterman | Zendy

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Acousto-convective relaxation oscillation in plasma lamp

Author(s) -

Seth Pree,

John P. Koulakis,

Alexander Thornton,

Seth Putterman

Publication year - 2018

Publication title -

proceedings of meetings on acoustics

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.15

H-Index - 16

ISSN - 1939-800X

DOI - 10.1121/2.0000865

Subject(s) - oscillation (cell signaling) , instability , upper hybrid oscillation , acoustic wave , physics , relaxation (psychology) , plasma , convection , amplitude , ion acoustic wave , resonator , plasma oscillation , convective instability , two stream instability , coupling (piping) , mechanics , acoustics , computational physics , optics , materials science , chemistry , psychology , social psychology , biochemistry , quantum mechanics , metallurgy

Periodic instability in sulfur plasma bulbs driven at their acoustic resonant frequency leads to behavior similar to a relaxation oscillation. This instability, which develops over the course of more than 500 acoustic periods manifests as both an oscillation in the total luminosity of the lamp and a frequency modulation of the resonator. We present evidence that the cause of this oscillation cycle stems from periodic eruptions of plasma from within a region near the acoustic velocity antinode. We propose that these oscillations and eruptions indicate a coupling between high amplitude acoustic waves and interface waves and consider whether this system might provide a platform with which to study turbulent heat transport.Periodic instability in sulfur plasma bulbs driven at their acoustic resonant frequency leads to behavior similar to a relaxation oscillation. This instability, which develops over the course of more than 500 acoustic periods manifests as both an oscillation in the total luminosity of the lamp and a frequency modulation of the resonator. We present evidence that the cause of this oscillation cycle stems from periodic eruptions of plasma from within a region near the acoustic velocity antinode. We propose that these oscillations and eruptions indicate a coupling between high amplitude acoustic waves and interface waves and consider whether this system might provide a platform with which to study turbulent heat transport.

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