ELECTROMAGNETIC FIELD INVESTIGATIONS INSIDE A HOLLOW CYLINDER

The behaviours of the electric and magnetic fields inside a conducting cylinder with a single axial aperture are not as well understood as is commonly believed. The experimental measurements and computer simulations described in this paper comprise a work in progress. The intention of the work is to use the conducting cylinder with a single axial aperture as a standard test object, in order to demonstrate present capabilities in measuring field strengths inside such a test object and to demonstrate the level of agreement attainable with commonly used computer codes. As the following experimental data will show, current free-field B-dot sensors cannot be used for measurements inside cavities, as they significantly perturb the fields they are trying to measure. There is indeed a pressing need to develop such nonperturbing sensors for use inside cavities.