Characterization of HIFU transducers designed for sonochemistry application: Cavitation distribution and quantification

L. Hallez (1) , F. Touyeras (1) , J.-Y. Hihn (1) , J. Klima (2) , J.-L. Guey (3) , M. Spajer (4) , Y. Bailly (4)

1 UTINAM - Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213)
2 Institut Heyrovsky of Physical Chemistry
3 Imasonic SAS [Voray sur l’Ognon]
4 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

Acoustic field distribution was determined in HIFU sonoreactors as well as localization of cavitation activity by crossing different techniques: modeling, hydrophone measurements, laser tomography and SCL measurements. Particular care was taken with quanti. cation of this last technique by pixels or photon counting. Cavitation bubbles generated by HIFU are mainly located on the outer layer of the propagation cone in the post-focal zone. Greatest acoustic activity is not located at the geometrical focal, but corresponds to a high concentration of bubbles zone. On the contrary, the main sonochemical activity shifts slightly toward the transducer, whereas quenching of inertial cavitation is observed directly at the focal. Finally, SCL thresholds have been determined.

Mots clés: HIFU; Acoustic cavitation; MBSCL threshold; Sonoreactors

Domaines: Optique / photonique; Optique [physics.optics]

L. Hallez, F. Touyeras, J.-Y. Hihn, J. Klima, J.-L. Guey, et al.. Characterization of HIFU transducers designed for sonochemistry application: Cavitation distribution and quantification. International Congress on Ultrasonics 2009, Jan 2009, Santiago, Chile. pp.310-317, ⟨10.1016/j.ultras.2009.09.011⟩. ⟨hal-00472207⟩