2020 International Symposium on Electrical Insulating Materials (ISEIM)最新文献

Conduction Phenomena of AC- and DC-XLPE Analyzed by Q(t) Method 用Q(t)法分析交、直流交联聚乙烯的导电现象

2020 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2020-09-13 DOI: 10.1541/ieejfms.141.584

Y. Sekiguchi, Kohei Hosomizu, T. Yamazaki

引用次数: 1

Surface and Internal Charge Measurement in Fluorinated Polymer Irradiated by Electron Using Non-contact Type PEA Method Measurement Apparatus 用非接触式PEA法测量电子辐照氟化聚合物表面和内部电荷

2020 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2020-09-13 DOI: 10.1541/ieejfms.141.665

Kaisei Enoki, Kazuki Endo, H. Miyake, Y. Tanaka

{"title":"Surface and Internal Charge Measurement in Fluorinated Polymer Irradiated by Electron Using Non-contact Type PEA Method Measurement Apparatus","authors":"Kaisei Enoki, Kazuki Endo, H. Miyake, Y. Tanaka","doi":"10.1541/ieejfms.141.665","DOIUrl":"https://doi.org/10.1541/ieejfms.141.665","url":null,"abstract":"Spacecrafts are exposed by the radioactive rays, such as high energy electrons and protons, plasma. The surface insulating materials of spacecraft are charged because of exposing by such high energy charged particles. This charging phenomenon is the origin of the electrostatic discharge and may lead to the fatal error of those operations. For the improving the reliability of spacecraft operation, we should understand charge accumulation phenomena based on the real surface condition. Therefore, our grope and other researchers have tried to develop systems to measure the surface and bulk charges of materials. As the results, we developed new space charge measurement equipment using the pulsed electroacoustic (PEA) method. That system can apply the pulsed electric filed to the sample through the vacuum gap using a grid electrode located 125 μm above the sample. Electrons through the grid electrode to the sample. Therefore, this apparatus can measure the surface and internal charge accumulation in the bulk of materials. Although we had measured only internal charge accumulation by the conventional PEA method, we obtained a seamless charge profile from the surface to internal of the sample by such newly developed system. In this report, we measured space charge distribution in the fluorinated materials by above developed system under electron irradiation. We found the following results. The negative charge accumulation distributed from the irradiation surface to penetration depth in the bulk. The amount of irradiated electrons accumulation was more than 30 times as much as the results obtained by a conventional measurement system. From those results, the space charge distribution has been able to measure under conditions consistent with close to actual use.","PeriodicalId":6751,"journal":{"name":"2020 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"96 1","pages":"486-489"},"PeriodicalIF":0.0,"publicationDate":"2020-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76213494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Dielectrophoretic Devices Fabricated by Proton Beam Writing for Concentration, Assembly, and Detection of Nanoparticles 质子束写入制备用于纳米颗粒浓缩、组装和检测的介电装置

2020 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2020-09-13 DOI: 10.1541/ieejfms.141.574

Toshiki Kimura, Ryousuke Kawashima, Ken Yamamoto, S. Uchida, Y. Ishii, H. Nishikawa

{"title":"Dielectrophoretic Devices Fabricated by Proton Beam Writing for Concentration, Assembly, and Detection of Nanoparticles","authors":"Toshiki Kimura, Ryousuke Kawashima, Ken Yamamoto, S. Uchida, Y. Ishii, H. Nishikawa","doi":"10.1541/ieejfms.141.574","DOIUrl":"https://doi.org/10.1541/ieejfms.141.574","url":null,"abstract":"Dielectrophoresis (DEP) is a phenomenon with directional movement of micro particles due to the DEP force under uneven AC electric field. We utilize polymer surface with microstructures such as μm-scale pit arrays for DEP devices to assemble or concentrate nanoparticles. For micro-structuring of the polymer such as PMMA with thickness of 5–10 μm, we applied proton beam writing (PBW) which is a direct-write lithographic technique for high-aspect ratio microstructures of polymeric materials such as PMMA and epoxy resin. Pit arrays such as 5 x 5 arrays of circular pits with diameter of 5 μm on the 5–10 μm thick PMMA. We were able to demonstrate collection and assembly of gold and Ag nanoparticles (diameter of 100 to 250 nm) on the PMMA pit arrays from the colloidal suspension of the metallic nanoparticles in water. The DEP experiments were performed with the amplitude (10–20 V) and frequency (1–100 kHz) of applied ac voltages with additional dc offset voltage of less than 1V. We also discuss possible application of this technique to the detection of micro and nanoparticles such as plastics, dielectrics and metals in environmental water.","PeriodicalId":6751,"journal":{"name":"2020 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"26 1","pages":"245-248"},"PeriodicalIF":0.0,"publicationDate":"2020-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90110735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Breakdown Characteristics of Cone-type ε-FGM Spacer for Gas Insulated Switchgears 气体绝缘开关柜用锥形ε-FGM隔片击穿特性

2020 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2020-09-13 DOI: 10.1541/ieejfms.141.546

Yusaku Miyazaki, Atsuhiro Izu, Zhao-yan Liang, H. Kojima, H. Masui, H. Mitsudome, H. Yanase, K. Okamoto, Keiji Watanabe, K. Kato, N. Hayakawa

引用次数: 5

Insulation Performance of Safety-Related Electrical Penetrations for Pressurized Water Reactors under Simulated Severe Accident Conditions 模拟严重事故条件下压水堆安全相关电侵彻的绝缘性能

2020 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2020-09-13 DOI: 10.1541/ieejfms.141.552

Watanabe Aiki, Ikeda Masaaki, Minakawa Takefumi, H. Naoshi, Ohki Yoshimichi

{"title":"Insulation Performance of Safety-Related Electrical Penetrations for Pressurized Water Reactors under Simulated Severe Accident Conditions","authors":"Watanabe Aiki, Ikeda Masaaki, Minakawa Takefumi, H. Naoshi, Ohki Yoshimichi","doi":"10.1541/ieejfms.141.552","DOIUrl":"https://doi.org/10.1541/ieejfms.141.552","url":null,"abstract":"Electrical penetrations (EPs) in nuclear power plants play important roles in keeping a primary containment vessel airtight and in connecting electrical cables from the inside to the outside. Safety-related EPs, which are categorized as “severe-accident (SA) equipment,” are required to maintain their intended functions under various SA environmental conditions after having been aged under the normal operating conditions throughout their service lives. To investigate the insulation performance of EPs in a SA environment, we tested two EPs that are equivalent to those used in pressurized water reactors in Japan. One EP specimen was pre-aged in a concurrent thermal and radiation environment at 100°C and 100 Gy/h for several thousand hours to simulate the degradation induced during the designated service period. The other EP specimen was used without pre-aging. To simulate the degradation induced by radiation during a SA, the EPs were irradiated with gamma rays to a total dose of 500 kGy at a dose rate of 7 kGy/h. Subsequently, the EP specimens were exposed to saturated steam at 155°C and 0.45 MPaG for 168 h. The electrical insulation resistance between the insulated cores of cables in each EP specimen were monitored during the steam exposure. The minimum insulation resistances that we measured during the steam exposure for EP specimens with and without the pre-aging are about 109 and 108Ω, respectively, confirming that they retain sufficiently good insulation performance.","PeriodicalId":6751,"journal":{"name":"2020 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"13 1","pages":"225-228"},"PeriodicalIF":0.0,"publicationDate":"2020-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87143736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2