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Electrostatic imaging via conformal mapping

Ibrahim Akduman1 and Rainer Kress2

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We present the solution of an inverse boundary value problem for harmonic functions arising in electrostatic imaging through conformal mapping techniques. The numerical method consists of two parts. In a first step, by successive approximations a nonlinear equation is solved to determine the boundary values of a holomorphic function on the outer boundary circle of an annulus. Then in a second step an ill-posed Cauchy problem is solved to determine the holomorphic function in the annulus. The method extends and modifies an earlier analysis of Idemen and Akduman (Idemen M and Akduman I 1988 SIAM J. Appl. Math. 48 703–18). We establish a convergence result for the iteration procedure and through numerical examples we illustrate the feasibility of the method.


PACS

41.20.Cv Electrostatics; Poisson and Laplace equations, boundary-value problems

02.30.Zz Inverse problems

MSC

65N21 Inverse problems

35F30 Boundary value problems for nonlinear first-order PDE

35J05 Laplace equation, reduced wave equation (Helmholtz), Poisson equation (See also 31Axx, 31Bxx)

65F22 Ill-posedness, regularization

Subjects

Mathematical physics

Accelerators, beams and electromagnetism

Dates

Issue 6 (December 2002)

Received 17 May 2002, in final form 3 October 2002

Published 1 November 2002



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