ITER超导磁体绝缘玻璃纤维放气性能分析

Study on outgassing properties of insulating glass fiber of ITER superconducting magnet

固体材料在大气中会溶解、吸附一部分气体,当材料置于真空环境时会因气体解溶、解吸而发生放气。超导体磁体作为国际热核聚变实验堆ITER(International Thermonuclear Experimental Reactor)装置的核心部件之一其制造过程中非常关键的步骤是真空压力浸渍(VPI),超导磁体所使用的绝缘玻璃纤维的放气是VPI过程中需重点考虑的问题。由于绝缘玻璃纤维表面积非常大,通过传统放气率计算公式所得到的材料放气量明显高于实际值,目前,国内外对超导磁体用绝缘玻璃纤维放气率的计算还没有准确的方法,对于玻璃纤维放气率的研究工作也鲜有报道。因此,本文将设计、搭建材料放气率测试平台,通过实验的方式测定超导磁体所用的玻璃纤维在各种状态下的放气率,从而为ITER超导磁体的研制提供理论依据。

Solid material can dissolve and absorb part of gas in the atmosphere. The material will be deflated in the vacuum because of the gas solution. As one of the core parts of the International Thermonuclear Experimental Reactor, the crucial step in the manufacturing process for superconductor magnet is vacuum pressure impregnation（VPI）, and outgassing of insulating glass fiber used in the superconducting magnet is the key issues for VPI. The material outgassing calculated by traditional formula was higher than the actual value, which is due to large surface area of the insulating glass fiber. At present, the calculation of the insulating glass fiber outgassing rate in the superconducting magnet at home and abroad is not accurate method, and there is rarely reported about the research on the outgassing rate of glass fiber. Therefore, this work design and builds on outgassing rate test platform, and test the superconducting magnet by the experimental methods used in glass fiber deflation in various states of rate, thereby to provide a theoretical basis for the development of ITER superconducting magnet.