High-pressure apparatus for dielectric measurements in high frequency.
The present article describes an experimental apparatus for the measurement of low-loss dielectric material under conditions of high pressures (maximum pressure 1500 bars) and high frequencies (1-15 MHz.) The measurements of these losses are based on the classical method of the Q-meter with a general Radio type 1690-A sample holder, located in a high-pressure bomb. All the manual operations made on the holder during the measurements are controlled by dc motors. The first results have shown that the dielectric losses of polyethylene (PE) vary with the pressure. This apparatus will later be used in the measurement of the dielectric losses of the insulating materials used for submarine telecommunication cables.
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Laboratoire de Genie Electrique, Equipe ''Materiaux Dielectriques,'' Associee au C.N.R.S., 2, Rue Camichel, 31000 Toulouse, France.
Lebarbier
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The Giam
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Bapt
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Farzaneh
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