Ultrasonic Beams with Bessel and Gaussian Profiles

dc.contributor.author Hsu, D. K.
dc.contributor.author Margetan, Frank
dc.contributor.author Hasselbusch, M.
dc.contributor.author Wormley, S.
dc.contributor.author Hughes, M.
dc.contributor.author Thompson, D.
dc.date 2018-02-14T03:32:31.000
dc.date.accessioned 2020-06-30T06:35:54Z
dc.date.available 2020-06-30T06:35:54Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 1990
dc.date.issued 1990
dc.description.abstract <p>A novel technique has been developed for generating ultrasonic beams with spatial profiles of amplitude governed by a truncated Bessel function or Gaussian function [1,2]. Bessel beams have very unique properties; in optics Bessel beams have been shown to be diffractionless (J. Durnin et al, 1987 [3,4]). In a related work, R. W. Ziolkowski et al [5] reported experimental measurements of “acoustic directed energy pulse trains” generated by synthetic line array of ultrasonic transmitters in water. However, a Bessel function ultrasonic transducer has never been reported before. Gaussian beams also have desirable properties; they are very easy to model analytically, and a circular Gaussian function ultrasonic transducer is free of near-field nulls and far-field sidelobes associated with conventional “piston source” transducers [6]. At least three designs of Gaussian transducers have been reported in the literature in the past 30 years [7–9]. We report a method in which piezoelectric ceramic elements are poled with nonuniform electric fields shaped like Bessel or Gaussian functions such that the resulting polarization (and hence the ultrasonic amplitude) follows that of the applied poling field. Like conventional piston source transducers, such Bessel or Gaussian transducers also possess the simple “parallel plate capacitor” configuration and can be packaged likewise. Beam profiles and propagation behavior of these Bessel and Gaussian transducers have been measured experimentally in an immersion tank and the results compared well with model predictions</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/1990/allcontent/101/
dc.identifier.articleid 1575
dc.identifier.contextkey 5777097
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1990/allcontent/101
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/59477
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/1990/allcontent/101/1990_HsuDK_UltrasonicBeamsBessel.pdf|||Fri Jan 14 18:13:29 UTC 2022
dc.source.uri 10.1007/978-1-4684-5772-8_101
dc.subject.disciplines Acoustics, Dynamics, and Controls
dc.subject.disciplines Electromagnetics and Photonics
dc.subject.keywords Ames Laboratory
dc.title Ultrasonic Beams with Bessel and Gaussian Profiles
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 9956a682-33d0-4792-aaf7-50dc9b3d1e5a
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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