摘要
上海天文台生产的SOHM-4型氢原子钟工作3a-4a离子泵就会打火,破坏脉泽真空环境。为了使氢钟能够继续工作,必须更换新的离子泵泵芯。为破解这一难题,使已经生产的上百台SOHM-4氢钟在10a的寿命期内不被中断运行,分析了离子泵抽氢机理及阴极材料,列举了大量实验结果,发现β-Ti合金比α-Ti有更大的吸氢容量,可以大幅度提升吸氢离子泵的寿命。最后指出,用β-Ti合金阴极板来替代目前的纯钛阴极板是一种有效的方法。
Shanghai Observatory SOHM-4 hydrogen atomic clocks work for 3-4 years, their ion pumps begin to arise sparks which destroy their vacuum condition. The pumping elements of the ion pump must be renewed for the hydrogen atomic clock continues working. To resolve the problem so that near hundred SHOM-4 hydrogen atomic clocks can be working for 10 years without interruption, the cathode materials and the pumping mechanism of the ion pump were analyzed and cited numerous experiment data, analyses found that β-Ti ally has more capability to pumping hydrogen, and increase lifetime of the ion pump. It pointed out that by using β-Ti ally instead of the current pure Ti cathode is an effective method to resolve the sparks problem of ion pump.
出处
《中国科学院上海天文台年刊》
2013年第1期64-71,共8页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
关键词
氢原子钟
溅射离子泵
阴极材料
钛合金
hydrogen maser
sputter ion-pump
cathode material
titanium alloy