Detection of ultrasonic echo pulses in crystals at low excitation levels

Authors

  • Віктор Олександрович Хандожко Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str., Ukraine
  • Микола Дмитрович Раранський Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str., Ukraine
  • Леонід Францович Політанський Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str., Ukraine
  • Віталій Назарович Балазюк Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str., Ukraine
  • Андрій Петрович Саміла Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str., Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2012.5999

Keywords:

echo-pulse method, automated measurements, elasticity, single crystals, phase shift

Abstract

On the basis of the echo-pulse method an automated experimental device was designed for measuring the velocity of the propagation and attenuation of the elastic waves of small amplitude in single crystals in wide temperature ranges. The method of reducing the level of excitation of ultrasonic vibrations of voltage up to 1V with simultaneous increase of sensitivity of the receiving channel by reducing the residual circuit vibration was designed. The high-frequency filling of the pulses is provided by a frequency synthesizer, which generates the electric oscillations in the range 4,5-80 MHz.  The main resonance frequency for a given transducer constitutes 9.75 MHz.  The measurement of the attenuation of ultrasound in crystals is carried out by the logarithmic intensifier-detector, assembled on the microcircuit AD 8310, which retains the necessary characteristics in the range of operating frequencies 0-440 MHz. The precision measurement of the change of the propagation velocities of ultrasonic waves in crystals is realized by a phase shift of the filling high-frequency oscillations between the probe and reflected pulses.

The examples of the ultrasound propagation experiment of such semiconductor materials as CdSb, Bi2Te3, GaSe are given

Author Biographies

Віктор Олександрович Хандожко, Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str.

Ph.D. student

The department of Radio Engineering and Information Security

The College of Physics

Микола Дмитрович Раранський, Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str.

D.Sc. (physics, mathematics), Professor

Head of the Department of Solid State Physics

The department of Solid State Physics

Леонід Францович Політанський, Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str.

D.Sc. (technical), Professor

Head of the Department of Radio Engineering and Information Security

The department of Radio Engineering and Information Security

Віталій Назарович Балазюк, Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str.

Ph.D. (physics, mathematics), lecturer

The department of Solid State Physics

The College of Physics

Андрій Петрович Саміла, Yuriy Fedkovych Chernivtsi National University Ukraine, 58000, Chernivtsi, 2 Kotsjubynskyi Str.

Ph.D. (technical), assistant

The department of Radio Engineering and Information Security

The College of Physics

References

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Published

2012-12-25

How to Cite

Хандожко, В. О., Раранський, М. Д., Політанський, Л. Ф., Балазюк, В. Н., & Саміла, А. П. (2012). Detection of ultrasonic echo pulses in crystals at low excitation levels. Eastern-European Journal of Enterprise Technologies, 6(11(60), 29–33. https://doi.org/10.15587/1729-4061.2012.5999

Issue

Vol. 6 No. 11(60) (2012): Radio engineering information tools

Section

Radio engineering information tools

License

Copyright (c) 2014 Віктор Олександрович Хандожко, Микола Дмитрович Раранський, Леонід Францович Політанський, Віталій Назарович Балазюк, Андрій Петрович Саміла

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