PDF
Full
Outline
Electron irradiation in the Geosynchronous orbit (GEO) will cause charge accumulation in aerospace insulating materials, which may cause electrostatic discharge of dielectric, while the electrostatic discharge will also affect the charge accumulation. In this paper, the joint measurement experiment of potential distribution and electrostatic discharge current was carried out on polyimide film materials under electron irradiation, and the surface charging and discharging process of polyimide film materials under the electronic irradiation of harsh GEO environment were studied. The results show that the surface potential of polyimide film is negative polarity under the electronic environment of 15 keV, 0.33 nA/cm2, the distribution patterns include unimodal type, multimodal type, crater type, and flat top type, and the unimodal type and multimodal type have the highest discharge number. Short-term multiple discharges will change the potential distribution pattern and make the transformed distribution pattern maintain for a long time. The potential distribution pattern will affect the wavefront time of discharge current signal, while the potential level will affect the half peak time of discharge current signal, and the half peak time of the current signal at low potential level is about 28% higher than that at high potential level.
PDF
138
65
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
