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Influence of gamma ray irradiation on thermal conductivity of bismaleimide-triazine-based insulation tape at cryogenic temperature

机译:γ射线辐射对低温温度下双酰亚胺 - 三嗪型绝缘带的热导率的影响

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摘要

Recent accelerator-based experiments for particle physics require the superconducting magnets that can be operated under high radiation environment. An electrical insulation tape, which is composed of polyimide film and a boron free glass fabric pre-impregnated with epoxy resin blended with bismaleimide-triazine resin, is developed to enhance the radiation tolerance for superconducting magnets. Since the thermal conductivity of insulation tape is one of key parameters that affects the coil temperature during the operation, the influence of gamma-ray irradiation on the thermal conductivity of the insulation tape is investigated with a maximum dose of 5 MGy. The thermal conductivity is measured at cryogenic temperature from 5?K to 20?K cooled by a Gifford-McMahon cryocooler. By comparing the thermal conductivity before and after the gamma ray irradiation, no significant degradation on the thermal conductivity has been observed.
机译:最近的基于加速器的颗粒物理学实验需要在高辐射环境下操作的超导磁体。 开发了一种电绝缘带,其由聚酰亚胺薄膜和预浸渍的环氧树脂与双聚酰亚胺 - 三嗪树脂混合的环氧树脂组成,以增强超导磁体的辐射耐受性。 由于绝缘带的导热系数是在操作期间影响线圈温度的关键参数之一,因此研究了伽马射线照射对绝缘带的导热率的影响,以最大剂量为5摩误。 在低温温度下测量导热率,从5Ωk到20≤k,由Gifford-McMahon冷冻机冷却。 通过比较伽马射线照射前后的导热率,已经观察到导热率的显着降解。

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