Electric field measurements in electrical discharge using a pockels device.
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概要
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An optical method for measuring electric field by means of a Pockels device is described. The method has the advantages of directly measuring the electric field in space, of hardly disturbing the field distribution in the measuring space by inserting the device, and of containing no power source in the device. Thus it has been used to investigate the electric field distorted by space charges due to electrical-discharge development. The sensor system consists of a light source, a polarizer, a quarter-wave plate, a Pockels device, and analyzer and a photodetector. The relation between measurable field component and the required polarization-direction of the analyzer is summarized for representative Pockels devices. The method for eliminating the effect of space charges attached to the Pockels device is described. The typical electric fields are shown which are measured in and around corona and leader discharges propagating in a rod-to-plane gap of 0.2-3 m subjected to positive voltages of 0.1-1 MV.
- 社団法人 レーザー学会の論文
社団法人 レーザー学会 | 論文
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