{"title":"熔融聚乙烯中克尔电光场的初步测量","authors":"J. Brennan, M. Zahn","doi":"10.1109/ICSD.1989.69258","DOIUrl":null,"url":null,"abstract":"Utilizing a frequency-selective amplifier, sensitive Kerr electrooptic field mapping measurements were made in melted (>110 degrees C) low-density polyethylene (LDPE) with a small signal AC voltage superimposed on a DC voltage. Preliminary measurements show significant levels of field distortion due to bipolar homocharge injection with charge density magnitudes on the order of 0.01 C/m/sup 3/ for field strengths on the order of 6 kV/cm. The experiment utilizes short parallel-plate electrodes of length 15 cm so that E/sub m/, the electric field necessary for the first light maxima with crossed polarizers, is approximately 500 kV/cm. By normalizing the optically measured average field to the voltage divided by spacing, the Kerr constant of melted LDPE at approximately=140 degrees C was found to be B approximately=1.3*10/sup -15/ m/V/sup 2/. The high sensitivity of the experiment also makes it possible to measure the self-field, and its subsequent decay, due to the charge density alone after the electrodes have been short-circuited.<<ETX>>","PeriodicalId":184126,"journal":{"name":"Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1989-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Preliminary Kerr electro-optic field measurements in melted polyethylene\",\"authors\":\"J. Brennan, M. Zahn\",\"doi\":\"10.1109/ICSD.1989.69258\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Utilizing a frequency-selective amplifier, sensitive Kerr electrooptic field mapping measurements were made in melted (>110 degrees C) low-density polyethylene (LDPE) with a small signal AC voltage superimposed on a DC voltage. Preliminary measurements show significant levels of field distortion due to bipolar homocharge injection with charge density magnitudes on the order of 0.01 C/m/sup 3/ for field strengths on the order of 6 kV/cm. The experiment utilizes short parallel-plate electrodes of length 15 cm so that E/sub m/, the electric field necessary for the first light maxima with crossed polarizers, is approximately 500 kV/cm. By normalizing the optically measured average field to the voltage divided by spacing, the Kerr constant of melted LDPE at approximately=140 degrees C was found to be B approximately=1.3*10/sup -15/ m/V/sup 2/. The high sensitivity of the experiment also makes it possible to measure the self-field, and its subsequent decay, due to the charge density alone after the electrodes have been short-circuited.<<ETX>>\",\"PeriodicalId\":184126,\"journal\":{\"name\":\"Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics\",\"volume\":\"17 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1989-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICSD.1989.69258\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICSD.1989.69258","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Preliminary Kerr electro-optic field measurements in melted polyethylene
Utilizing a frequency-selective amplifier, sensitive Kerr electrooptic field mapping measurements were made in melted (>110 degrees C) low-density polyethylene (LDPE) with a small signal AC voltage superimposed on a DC voltage. Preliminary measurements show significant levels of field distortion due to bipolar homocharge injection with charge density magnitudes on the order of 0.01 C/m/sup 3/ for field strengths on the order of 6 kV/cm. The experiment utilizes short parallel-plate electrodes of length 15 cm so that E/sub m/, the electric field necessary for the first light maxima with crossed polarizers, is approximately 500 kV/cm. By normalizing the optically measured average field to the voltage divided by spacing, the Kerr constant of melted LDPE at approximately=140 degrees C was found to be B approximately=1.3*10/sup -15/ m/V/sup 2/. The high sensitivity of the experiment also makes it possible to measure the self-field, and its subsequent decay, due to the charge density alone after the electrodes have been short-circuited.<>
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