Contents: 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001

2004, 10

D. A. Kas’yanov, G. E. Fiks, G. M. Shalashov

Diffraction method for focusing of acoustic fields radiated by extended borehole antennas

language: English

received 21.03.2004, published 18.08.2004

Download article (PDF, 300 kb, ZIP), use browser command "Save Target As..."
To read this document you need Adobe Acrobat © Reader software, which is simple to use and available at no cost. Use version 4.0 or higher. You can download software from Adobe site (http://www.adobe.com/).

ABSTRACT

One way to make a focusing borehole antenna using diffraction focusing of the acoustic field is considered. The primary attention is paid to the methods of partition of an extent borehole antenna cylindrical aperture into areas with antiphase excitation for the formation of a cylindrical zone lens. It is shown that, there is also an alternative method besides the classical Fresnel zones partition. Specific features of the elastic field distributions in the massif, created by different zone lenses, are examined. Applicability of focusing borehole antennas, designed as zone lenses, in geotechnologies is discussed.

10 pages, 6 figures

Сitation: D. A. Kas’yanov, G. E. Fiks, G. M. Shalashov. Diffraction method for focusing of acoustic fields radiated by extended borehole antennas. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2004, 10.

REFERENCES

1. Proceedings on the First Conference on Elastic-Wave Stimulation of Fluid Flow in Porous Media, Gubkin Oil and Gas University, Moscow, 2002.
2. Kas'yanov D. A. and Shalashov G. M., Acoustic intensification of underground leaching, Nonlinear Acoustics at the beginning of the 21th Century (Proceedings on the 16th International Symposium on Nonlinear Acoustics, Moscow), MSU, 2002, V. 2, P. 1201–1204; Proceedings on the First Conference on Elastic-Wave Stimulation of Fluid Flow in Porous Media, Gubkin Oil and Gas University (Satellite scientific event for the 16th ISNA), Moscow, 2002, (full).
3. Kas’yanov D. A., Shalashov G. M. Focusing of Divergent Cylindrical Waves and the Prospects for Borehole Acoustics. Radiofizika (Russia) 45(2), 170–186 (2002). Radiophysics and Quantum Electronics (USA), 45(2), 153–167 (2002).
4. Kas’yanov D. A. Cylindrical Zone Lens. Radiofizika (Russia) 43(9), 782–792 (2000). Radiophysics and Quantum Electronics (USA), 43(9), 701–710 (2000).
5. Kas’yanov D. A. Divergent Cylindrical Wave Focusing. Akusticheskii Zhurnal (Russia) 39 (6), 1076–1087 (1993). Acoust. Phys. (USA) 39(6), 566–571 (1993).
6. Kas’yanov D. A. Focusing of Diverging Cylindrical Wave II. Akusticheskii Zhurnal (Russia) 40(1), 76–83 (1994). Acoust. Phys. (USA) 40(1), 56–70 (1994).
7. Kanevskii I. N. Focusing of sound and ultrasound waves [in Russian], M. Nauka. 1977. 366 pp.
8. Gorelik G. S. Oscillations and Waves (in Russian), Fizmatgiz, Moscow, 1959. 572 pp.
9. Maluzhinets G. D. Diffraction near the axis of zone plate. Doklady Academii Nauk (Russia) 54(5), 403–406 (1946).
10. Karpacheva A. A., Rozenberg L. D., Tartakovskii B. D. Experimental investigating on diffraction near focus of zone plate. Doklady Academii Nauk (Russia) 54(5), 399–401 (1946).
11. Kas’yanov D. A. Extended piezoceramic antenna radiating in a borehole. Radiofizika (Russia) 46(2), 111–122 (2003). Radiophysics and Quantum Electronics (USA) 46(2), 111–122 (2003).
12. Kas’yanov D. A. Some details of non-compensated piezoceramic antenna radiating in borehole [in Russian], Technical Acoustics 2003, 3, http://www.ejta.org.
13. Kas’yanov D. A. About piezoelectric focused antenna radiating in borehole. Proceedings on the 13th Session of Russian Acoustic Society [in Russian], V. 2. M. GEOS. 2003. P. 95–98. http://rao.akin.ru/ras.htm [in English].
14. Krauklis P. V., Krauklis L. A. On the spectrum of a longitudinal wave in the borehole with cemented casing string. Issues of the dynamic theory of seismic wave propagation. Issue 17 [in Russian], Nauka, Leningrad (1976), 156–164.


 

Kas’yanov Dmitrii Al’bertovich, PhD, Head of the Department “Acoustics and Seismophysics” in Radiophysical Research Institute.
Areas of interest: Nonlinear Acoustics, Geo-acoustics, Ultrasonic equipment creating and producing.

e-mail: kasd(at)nirfi.sci-nnov.ru

 
 

Fiks Galina Efimovna, researcher, Applied Physics Institute RAS.
Area of interest: computer simulation.

 
 

Shalashov Gennady Mikhailovich, PhD, senior researcher in Radiophysical Research Institute.
Areas of interest: Nonlinear Acoustics, Seismophysics.