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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantification of Two-Dimensional Acoustic Field Generated by a Surface Barrier Discharge With Fiber-Type Optical Wave Microphone Computer Tomography

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Author(s):
Mitsugi, Fumiaki [1] ; Kikuchi, Ryo [2] ; Honda, Sho [2] ; Paiva, Victoria [3] ; Sakamoto, Joao [4] ; Nakamiya, Toshiyuki [5] ; Sonoda, Yoshito [5]
Total Authors: 7
Affiliation:
[1] Kumamoto Univ, Fac Adv Sci & Technol, Kumamoto 8608555 - Japan
[2] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555 - Japan
[3] Technol Inst Aeronaut, ITA, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[4] Inst Adv Studies, IEAv, BR-12228001 Sao Jose Dos Campos, SP - Brazil
[5] ShinGiken Co Ltd, Kumamoto 8600075 - Japan
Total Affiliations: 5
Document type: Journal article
Source: IEEE TRANSACTIONS ON PLASMA SCIENCE; v. 49, n. 11, p. 3589-3596, NOV 2021.
Web of Science Citations: 0
Abstract

An optical wave microphone, which is well designed based on Fraunhofer diffraction of a laser beam, is expected to be applied to various acoustic fields where conventional microphones cannot be used due to strong electric and/or magnetic field. The authors have developed this technique and applied it to detect discharge sounds emitted from plasmas such as micro plasma, gliding arc plasma and plasma jet. An improved optical wave microphone with regard to signal-to-noise ratio uses single mode optical fibers for laser transformation. In this study, detailed characteristics of the fiber-type optical wave microphone were evaluated according to the theory of the optical wave microphone. Furthermore, the fiber-type optical wave microphone was combined with computer tomography (CT). The fiber-type optical wave microphone CT succeeded to visualize and quantify 2-D acoustic field generated by an ultrasonic transducer, and the obtained sound pressure distribution showed good similarity to that measured with a condenser microphone. Furthermore, the technique was applied to surface barrier discharge with different applied voltage frequencies and the distribution of acoustic waves above the discharge was quantified. (AU)

FAPESP's process: 17/06935-2 - Short-term research project in Kumamoto University as part of the master's degree research project "Development of an optical sensor for non-destructive inspection of aeronautics and space structures".
Grantee:Victória Spinardi Cabral Paiva
Support Opportunities: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 16/12182-4 - Development of an optical sensor for non-destructive inspection of aeronautics and space structures
Grantee:Victória Spinardi Cabral Paiva
Support Opportunities: Scholarships in Brazil - Master