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Tunable time-reversal cavity for high-pressure ultrasonic pulses generation: A tradeoff between transmission and time compression
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10.1063/1.4742930
/content/aip/journal/apl/101/6/10.1063/1.4742930
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/6/10.1063/1.4742930

Figures

Image of FIG. 1.
FIG. 1.

(a) Solid TRC, (b) water TRC, and (c) tunable TRC. From left to right: Concept scheme of the TRC, a typical signal obtained by a FDTD simulation. Below (c): Our experimental realization in 2 configurations A and B (see further).

Image of FIG. 2.
FIG. 2.

(a) Theoretical scattering cross section and mean cosine of a 0.8 mm diameter steel rod. (b) FDTD simulation. A linear probe is simulated to focus at 3 cm through the rods. Effect of the density of rods on the pressure value using classic TR and the 1-bit TR deducted value using the theoretical gain.

Image of FIG. 3.
FIG. 3.

Effect of the width of the scattering medium in the configurations (A) and (B) for several angulations of the probe.

Image of FIG. 4.
FIG. 4.

(a) Beamsteering diagram in configuration A. (b) Shock wave obtained with the optimal TRC at maximum output voltage (P+ = 23.3 MPa, P = −9.0 MPa).

Tables

Generic image for table
Table I.

Normalized pressure at the focus obtained in FDTD simulations (same transmitted acoustic intensity for each configuration). Left column: time-reversal; right column: 1-bit TR.

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/content/aip/journal/apl/101/6/10.1063/1.4742930
2012-08-07
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable time-reversal cavity for high-pressure ultrasonic pulses generation: A tradeoff between transmission and time compression
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/6/10.1063/1.4742930
10.1063/1.4742930
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