The coupling impedance of a hole in a thick-wall beam pipe has been calculated for hole dimensions that are small compared to the wavelength. In particular, the longitudinal and transverse coupling impedances are shown to be proportional to the difference between the transverse magnetic susceptibility and the electric polarizability of the inside surface of the hole, and these quantities are themselves proportional to the cube of the hole dimensions.
No takes yet. Share an insight, caveat, or question.
R.L. Gluckstern (1992) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: