The monotonicity method for the inverse crack scattering problem

Abstract

The monotonicity method for the inverse acoustic scattering problem is to understand the inclusion relation between an unknown object and artificial one by comparing the far field operator with the artificial operator. This paper introduces the development of this method to the inverse crack scattering problem. Our aim is to give the following two indicators: One (Theorem 1.1) is to determine whether an artificial small arc is contained in the unknown arc. The other one (Theorem 1.2) is whether an artificial large domain contains the unknown one. Finally, numerical examples based on Theorem 1.1 are given.

Keywords:

• Inverse scattering
• monotonicity method
• crack detection
• far field operator
• Helmholz equation

2010 AMS Subject Classification:

• 35R30

Acknowledgments

Authors thank to Professor Bastian von Harrach, who gave us helpful comments in our study.

Disclosure statement

No potential conflict of interest was reported by the author(s).

ORCID

Takashi Furuya http://orcid.org/0000-0001-6132-6846