Resonant Conversion of the Point-Source Field to Multipole Radiation Using Ring Layer of the Overcritical Plasma

2013 ◽  
Vol 56 (5) ◽  
pp. 298-303
Author(s):  
A. P. Anyutin ◽  
I. P. Korshunov ◽  
A. D. Shatrov
Keyword(s):  
Point Source ◽  
Source Field ◽  
Multipole Radiation

High-Frequency Diffraction of a Point Source Field by a Strongly Elongated Elliptic Cylinder

2019 ◽  
Vol 105 (6) ◽  
pp. 912-917
Author(s):  
Ivan V. Andronov
Keyword(s):  
Point Source ◽  
Cross Section ◽  
Acoustic Field ◽  
High Frequency ◽  
Elliptic Cylinder ◽  
Linear Source ◽  
Source Field ◽  
Major Semiaxis

The problem of diffraction of a high-frequency point source acoustic field by an infinite elliptic cylinder with a strongly elongated cross-section is studied. At every direction of propagation, the solution is shown to be similar to those of a linear source field diffraction by a cylinder with correspondingly enlarged major semiaxis.

A Small Axisymmetric Obstacle in the Presence of an Underwater Point-Source Field

1997 ◽  
Vol 05 (03) ◽  
pp. 243-263 ◽  
Author(s):  
A. Charalambopoulos ◽  
G. Dassios ◽  
P. Ergatis
Keyword(s):  
Free Surface ◽  
Point Source ◽  
Pressure Field ◽  
Vertical Line ◽  
Source Field ◽  
Floating Object ◽  
Smooth Objects ◽  
Special Case

A small, acoustically hard and axisymmetric object is placed in a deep homogeneous sea environment with a hard plane bottom. The free surface of the sea is assumed to be soft. The source and the receiver are placed on the same vertical line, far away from the object. Given the positions of the source and the receiver, two problems are solved: the determination of the pressure field at the receiver from the position and the shape of the object, and the determination of the position and the shape of the object from the pressure field at the receiver. The special case of smooth objects generated by the rotation of differentiable curves is studied. We provide results for the case of a floating object and for the case of an object or a boss at the bottom of the sea.

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