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Effect of gamma-ray irradiation on vacuum surface insulation properties of PMMA
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Yawei ZHOU1, Shi YANG1, Yixiang HU1, Deyu HE1, Aixu ZHONG1, Jiahui YIN1, Weixi LUO1, Yuan LI2
Insulating Materials | 2025, 58(5) : 81 - 88
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Insulating Materials | 2025, 58(5): 81-88
• Insulation Technology •
Effect of gamma-ray irradiation on vacuum surface insulation properties of PMMA
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Yawei ZHOU1, Shi YANG1, Yixiang HU1, Deyu HE1, Aixu ZHONG1, Jiahui YIN1, Weixi LUO1, Yuan LI2
Affiliations
  • 1. National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi′an 710024, China
  • 2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
Published: 2025-05-20 doi: 10.16790/j.cnki.1009-9239.im.2025.05.011
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The vacuum surface insulation performance of insulation material used in radiation environment simulation devices will be significantly affected by long-term radiation exposure. By conducting irradiation ageing experiments of different doses of gamma ray on polymethyl methacrylate (PMMA) materials, the variation law of surface microstructure and electrical performance parameters of PMMA materials with gamma ray irradiation dose was studied. The results show that when irradiated under a low-dose (0.1 kGy) gamma rays, the distribution of surface traps on the material is the main factor affecting the vacuum surface withstand voltage characteristics of PMMA the vacuum surface ageing voltage of PMMA increases by 11.7% compared to the unirradiated sample. When irradiated with high doses (greater than 1.0 kGy) of gamma rays, holes appear on the surface of PMMA material, and the local electric field intensity is distorted, becoming a "weak area" of vacuum surface insulation. Appropriate doses of gamma ray irradiation is helpful to improve the vacuum surface insulation performance of PMMA.

PMMA  /  gamma-ray irradiation  /  vacuum surface  /  insulation
Yawei ZHOU, Shi YANG, Yixiang HU, Deyu HE, Aixu ZHONG, Jiahui YIN, Weixi LUO, Yuan LI. Effect of gamma-ray irradiation on vacuum surface insulation properties of PMMA[J]. Insulating Materials, 2025 , 58 (5) : 81 -88 . DOI: 10.16790/j.cnki.1009-9239.im.2025.05.011
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doi: 10.16790/j.cnki.1009-9239.im.2025.05.011
  • Receive Date：2024-05-30
  • Online Date：2025-12-04
  • Published：2025-05-20
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  • Received：2024-05-30
  • Revised：2024-07-19
Affiliations
    1. National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi′an 710024, China
    2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2025.05.011
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光柄菇属 Pluteus 5 2.39
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栓菌属 Trametes 5 2.39
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