Experimental Study on Paschen Tests of ITER Current Lead Insulation  

作　　者：郑金星 宋云涛 黄雄一 陆坤 奚维斌 丁开忠 叶斌 牛二武 

机构地区：[1]Institute of plasma physics, Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2013年第2期152-156,共5页等离子体科学和技术（英文版）

基　　金：supported by ITER IO, the National "973" Program of China (No. 2007ID2006);the National ITER Special Support for R&D on Science and Technology for ITER, CN Schedule Task (No. 2008GB102000)

摘　　要：An experimental Paschen test setup has been established to analyze the quality of ITER current lead （CL） insulation and extend the research on Paschen＇s law under various conditions. Insulation problems can destroy a machine if a Paschen discharge is triggered by an insulation defect that is caused by faulty manufacturing, electromagnetic force, and thermal stress load with a certain degree of vacuum helium or pipe leakage. The results show that the CL insulation mock-up worked well under normal temperature and pressure. Besides, the mock-up also worked well in helium conditions and at 80 K temperature at different pressures. One area of CL insulation was severely destroyed when the 80 K test was conducted after 5 thermal cycles, resulting in Paschen discharge phenomenon. The breakdown voltage is maintained at a relatively low level under different pressure conditions; the change of breakdown voltage was mainly due to the change of pressure, and such change was in line with the Paschen law.An experimental Paschen test setup has been established to analyze the quality of ITER current lead （CL） insulation and extend the research on Paschen＇s law under various conditions. Insulation problems can destroy a machine if a Paschen discharge is triggered by an insulation defect that is caused by faulty manufacturing, electromagnetic force, and thermal stress load with a certain degree of vacuum helium or pipe leakage. The results show that the CL insulation mock-up worked well under normal temperature and pressure. Besides, the mock-up also worked well in helium conditions and at 80 K temperature at different pressures. One area of CL insulation was severely destroyed when the 80 K test was conducted after 5 thermal cycles, resulting in Paschen discharge phenomenon. The breakdown voltage is maintained at a relatively low level under different pressure conditions; the change of breakdown voltage was mainly due to the change of pressure, and such change was in line with the Paschen law.

关 键 词：paschen test INSULATION DISCHARGE ITER current lead low temperature 

分 类 号：O53[理学—等离子体物理]