超导磁体帕邢测试真空度动态平衡的实现

来源 :中国真空学会2016学术年会 | 被引量 : 0次 | 上传用户:BlueDragon8848
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  为了验证超导磁体绝缘的完整性,在超导磁体制造完成后,需对超导磁体绝缘进行相 应的帕邢测试,用于帕邢测试的真空容器需要稳定在不同等级低气压下较长时间.而使用传 统的静态保压方式很难实现这一点.为此,本文设计了一套用于维持超导磁体帕邢测试真空 度动态平衡控制系统.当抽气机组对低气压状态下的真空容器抽气时,通过 PID控制系统 调节真空容器进气阀门开口大小,确保真空容器在一定低气压值下较长时间保持稳定.测试 结果表明,通过以上动态平衡控制系统能够将真空容器内真空度有效的维持在1±0.05 Pa,10±1 Pa,100±0.2 Pa 和 1000±0.4 Pa,且每一阶段真空度维持时间均达到 8 h 以上.基本满 足大型超导磁体帕邢测试真空度要求.对后续大型超导磁体帕邢测试真空室真空度维持具有 一定参考价值.
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