Acoustic emission by self-organising effects of micro-hollow cathode discharges

作者：Kotschate Daniel^*; Gaal Mate; Kersten Holger

来源：Applied Physics Letters, 2018, 112(15): 154102.

DOI：10.1063/1.5024459

We designed micro-hollow cathode discharge prototypes under atmospheric pressure and investigated their acoustic characteristics. For the acoustic model of the discharge, we correlated the self-organisation effect of the current density distribution with the ideal model of an acoustic membrane. For validation of the obtained model, sound particle velocity spectroscopy was used to detect and analyse the acoustic emission experimentally. The results have shown a behaviour similar to the ideal acoustic membrane. Therefore, the acoustic excitation is decomposable into its eigenfrequencies and predictable. The model was unified utilising the gas exhaust velocity caused by the electrohydrodynamic force. The results may allow a contactless prediction of the current density distribution by measuring the acoustic emission or using the micro-discharge as a tunable acoustic source for specific applications as well. Published by AIP Publishing.

• 出版日期2018-4-9