P A Bradley and G P Jones 1974 J. Phys. E: Sci. Instrum. 7 449 doi:10.1088/0022-3735/7/6/016
P A Bradley and G P Jones
Show affiliationsA novel method for the study of nonlinear dielectric effects has been developed, which allows, for the first time, measurements to be carried out on conductive media such as water. The sample is contained in a dielectric cell which is part of the tank circuit of an oscillator. A rectangular electric field pulse of up to 15 MV m-1 is applied to the sample, and the resulting frequency change of the oscillator due to the nonlinear dielectric effect is measured using a computing frequency counter. This frequency change is simply related to the change in relative permittivity Delta epsilon . By sampling the frequency of the oscillator at different points throughout the duration of the electric field pulse, a very faithful reproduction of the profile of the nonlinear effect can be built up. Details are given of the instrumentation along with illustrative results for diethyl ether.
77.22.Ch Permittivity (dielectric function)
84.30.Sk Pulse and digital circuits
84.30.Ng Oscillators, pulse generators, and function generators
Issue 6 (June 1974)
P A Bradley and G P Jones 1974 J. Phys. E: Sci. Instrum. 7 449
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