**47**, 3, pp. 355–362, 2022

**10.24425/aoa.2022.142009**

### About Unusual Diffraction and Thermal Self-Action of Magnetosonic Beam

field do not reveal diffraction. The special case, when the sound and Alfvénic speeds are equal, is discussed. This magnetosonic beams incorporate acoustic and Alfvénic properties and do not undergo diffraction in this particular case.

**Keywords**: non-linear magnetoacoustics; diffraction of beams; acoustic thermal self-action; magnetohydrodynamics

**Full Text:**PDF

#### References

Botha G.J.J., Arber T.D., Nakariakov V.M., Keenan F.P. (2000), A developed stage of Alfvén wave phase mixing, Astronomy and Astrophysics, 363(3): 1186–1194.

Callen J.D. (2003), Fundamentals of Plasma Physics, Lecture notes, University of Wisconsin, Madison.

Chin R., Verwichte E., Rowlands G., Nakariakov V.M. (2010), Self-organization of magnetoacoustic waves in a thermal unstable environment, Physics of Plasmas, 17: 032107, doi: 10.1063/1.3314721.

Duck F.A. (2002), Nonlinear acoustics in diagnostic ultrasound, Ultrasound in Medicine & Biology, 28(1): 1–18, doi: 10.1016/S0301-5629(01)00463-X.

Freidberg J.P. (1987), Ideal Magnetohydrodynamics, Plenum Press, New York.

Hamilton M., Blackstock D. [Eds] (1998), Nonlinear Acoustics, Academic Press, New York.

Krall N.A., Trivelpiece A.W. (1973), Principles of Plasma Physics, McGraw Hill, New York.

Kuznetsov V.P. (1971), Equations of nonlinear acoustics, Soviet Physics Acoustics, 16: 467–470.

Leble S., Perelomova A. (2018) The Dynamical Projectors Method: Hydro and Electrodynamics, CRC Press.

McLaughlin J.A., De Moortel I., Hood A.W. (2011), Phase mixing of nonlinear visco-resistive Alfvén waves, Astronomy & Astrophysics, 527: A149, doi: 10.1051/0004-6361/201015552.

Nakariakov V.M., Mendoza-Briceño C.A., Ibáñez M.H. (2000), Magnetoacoustic waves of small amplitude in optically thin quasi-isentropic plasmas, The Astrophysical Journal, 528(2): 767–775, doi: 10.1086/308195.

Rudenko O.V., Sapozhnikov O.A. (2004), Self-action effects for wave beams containing shock fronts, Physics-Uspekhi, 47(9): 907–922.

Rudenko O.V., Soluyan S.I. (1977), Theoretical Foundations of Nonlinear Acoustics, Plenum, New York.

Yufeng Z. (2015), Principles and Applications of Therapeutic Ultrasound in Healthcare, Taylor & Francis Inc.

DOI: 10.24425/aoa.2022.142009