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Exact Inverse‐Separation Series for Multiple Scattering in Two Dimensions

 

作者: James E. Burke,   Dan Censor,   Victor Twersky,  

 

期刊: The Journal of the Acoustical Society of America  (AIP Available online 1965)
卷期: Volume 37, issue 1  

页码: 5-13

 

ISSN:0001-4966

 

年代: 1965

 

DOI:10.1121/1.1909310

 

出版商: Acoustical Society of America

 

数据来源: AIP

 

摘要:

We consider configurations of arbitrary scatterers (s= 1, … ,N) in two dimensions, such that the circles circumscribing the scatterers do not intersect. As shown previously [V. Twersky, inElectromagnetic Waves, R. E. Langer, Ed. (University of Wisconsin Press, Madison, 1962), pp. 361–389], the solution can be written in terms of the multiple‐scattered scattering amplitudesGs, and theGsare specified by the presumably known farfield isolated scattering amplitudesgsby a set of integral equationsG(g) (which can be converted to algebraic equations involving Hankel functions of the separationsbst, etc.). Among other applications, the previous paper gave the complete asymptotic series forG(g) in inverse powers of theb's; this was based essentially on Hankel's asymptotic expansion for the Hankel functionsHn. The present paper derives the analogous convergent representation ofG(g) based on the exact representation ofHnin terms of Lommel polynomials. ForNscatterers, we give the multiple‐scattering solution as a series inH0,H1,b−n, and the derivatives ofgwith respect to angles. For two scatterers, we give a closed form in terms of a differential operator.

 

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