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TEAM (Testing Electromagnetic Analysis Methods) represents an open international working group aiming to compare electromagnetic analysis computer codes. TEAM Workshops are meetings of this group. A series of TEAM Workshops was started in 1986 and has been organized in two-year rounds, each comprising a series of ”Regional” workshops and a ”Final” Workshop, as a satellite event of the COMPUMAG Conference. The TEAM problems consist in a list of test-problems, with precisely defined dimensions, constitutive laws of materials, excitations, etc., and each backed by a real laboratory device, on which measurements can be made.

Problem 11 [1] of the TEAM workshops for eddy current code comparison is a hollow conducting sphere in a uniform magnetic field. The applied field varies with time as a step function, requiring a fully transient solution. Magnetic field in and outside the sphere at different instants are measured and compared to the analytical solution [2] .

[1] SUMMARY OF RESULTS FOR HOLLOW CONDUCTING SPHERE IN UNIFORM TRANSIENTLY VARYING MAGNETIC FIELD. C.R.I. EMSON. COMPEL—The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Vol. 9, No. 3, 191-203 © 1990 James & James Science Publishers Ltd
[2] Z. Ren, Analytic solution for hollow sphere in uniform field with a step function time variation.
October 1989. Laboratoire de Genie Electrique de Paris, France (Private communication).