Low-frequency ultrasonic Bessel-like collimated beam generation from radial modes of piezoelectric transducers

Chillara, Vamshi Krishna; Pantea, Cristian; Sinha, Dipen N.

doi:10.1063/1.4975800

Low-frequency ultrasonic Bessel-like collimated beam generation from radial modes of piezoelectric transducers

Journal Article · Mon Feb 06 00:00:00 EST 2017 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4975800· OSTI ID:1414098

^[1]; Pantea, Cristian ^[1]; Sinha, Dipen N. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We present a very simple approach to generate a collimated ultrasonic beam that exploits the natural Bessel-like vibration pattern of the radial modes of a piezoelectric disc with lateral clamping. This eliminates the need for the conventional annular Bessel pattern of the electrodes with individual electrode excitation on the piezo-disc, thus simplifying the transducer design. Numerical and experimental studies are carried out to investigate the Bessel-like vibration patterns of these radial modes showing an excellent agreement between these two studies. Measured ultrasonic beam- pro les in water from the radial modes con rm the profile to be a Bessel beam. Collimated beam generation from radial modes is investigated using a coupled electromechanical finite-element model. It is found that clamping the lateral edges of piezoelectric transducers results in a high-degree of collimation with practically no side-lobes similar to a parametric array beam. Ultrasonic beam- profile measurements in water with both free and clamped piezoelectric transducer are presented. The collimated beam generation using the present technique of using the laterally clamped radial modes finds significant applications in low-frequency imaging through highly attenuating materials.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1414098

Alternate ID(s):: OSTI ID: 1348019

Report Number(s):: LA--UR-16-29108

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 6 Vol. 110; ISSN APPLAB; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Generating Bessel beams with broad depth-of-field by using phase-only acoustic holograms Jiménez-Gambín, Sergio; Jiménez, Noé; Benlloch, José M. Scientific Reports, Vol. 9, Issue 1 https://doi.org/10.1038/s41598-019-56369-z	journal	December 2019
Full-waveform inversion and least-squares reverse-time migration imaging of collimated ultrasonic-beam data for high-resolution wellbore integrity monitoring Chen, Yu; Gao, Kai; Davis, Eric S. Applied Physics Letters, Vol. 113, Issue 7 https://doi.org/10.1063/1.5034122	journal	August 2018

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