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Excitation of Bulk Acoustic Waves by Interdigital Transducer From the Surface of Lithium Niobate Crystals

The excitation of bulk acoustic waves of the UHF range by interdigital transducer from the XY surface of lithium niobate crystals is considered. Experimental studies were carried out on acoustoelectronic delay lines, in which interdigital transducers were used during excitation and receiving acoustic waves. It is established that the electromagnetic wave delayed on the interdigital transducer causes a bulk acoustic wave, the structure of which contains a set of spatial harmonics.

Structure of the sedimentary cover of the island Aleksandra's Earth of the archipelago of Franz Joseph land

Aim. To investigate the structure of the sedimentary cover Cape "Nagurskoe" about. Alexandra Arch. Franz Josef (Franz Josef Land) for microseisms measurements on the two profiles, passed during expeditions of 2011-2012. Methods. The technique involves the preparation of microseisms measurements of their relative intensity distribution along the profile and depth using the microseismic sounding method (MSM).