Abstract
Intense transient electric field measurements are widely applied in various research areas. An optical intense E-field sensor for time-domain measurements, based on the electro-optic effect of lithium niobate, has been studied in detail. Principles and key issues in the design of the sensor are presented. The sensor is insulated, small in size (65 mm × 15 mm × 15 mm), and suitable for high-intensity (<801 kV/m) electric field measurements over a wide frequency band (10 Hz–10 MHz). The input/output characteristics of the sensor were obtained and the sensor calibrated. Finally, an application using this sensor in testing laboratory lightning impulses and in measuring transient electric fields during switch-on of a disconnector confirmed that the sensor is expected to find widespread use in transient intense electric field measurement applications.
Highlights
INTRODUCTIONResearch on measurement technology for intense electric fields is essential for a variety of research areas
Intense transient electric field measurements are widely applied in various research areas
The input/output characteristics of the sensor were obtained and the sensor calibrated. An application using this sensor in testing laboratory lightning impulses and in measuring transient electric fields during switch-on of a disconnector confirmed that the sensor is expected to find widespread use in transient intense electric field measurement applications
Summary
Research on measurement technology for intense electric fields is essential for a variety of research areas. Some of the research work has been performed with the aim of measuring high voltages and high electrical fields.[2,12,13] The crystals mainly used in these sensors are potassium dihydrogen phosphate (KDP), bismuth germanium oxide (BGO), and bismuth silicon oxide (BSO). These sensors have been applied in scientific and technical measurements of electric fields. The characteristics of the designed sensor have been verified both through laboratory and field tests of transient electric fields
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