【摘要】 本文介绍了一种小型金属氦杜瓦瓶电磁屏蔽性能的初步实验结果。这种小型杜瓦可贮存液氦4升,维持时间约24小时.它具有电屏蔽作用,具有较好的抗电干扰能力.对50Hz和50Hz以上频率的交流磁场亦有一定的屏蔽效果.它比较适用于约瑟夫逊器件及小型超导器件的液氦实验.更多还原

【Abstract】 In this paper we reported the experimental results on electro-magnetic shielding properties of a kind of small metal dewar. The dewar’s container is 4-liter with a hold time of about 24 hours. It possesses electric shielding property and shielding ability for AC magnetic field more than 50 Hz. It is suitable for Josephson devices and other superconducting devices.更多还原