摘要
描述了上海天文台在2008年为提高被动型氢原子钟真空系统的可靠性所研制的由非蒸散型吸气剂泵和小离子泵组成的复合泵的实验过程,吸气剂泵在室温下吸收2.1MPa.l的H2气后仍可达到3.2×10-5Pa的真空度,2l/s的离子泵电流工作在0.30μA,证明了复合泵可以维持氢钟13年以上的正常工作。经过再激活固定了激活工艺,吸气剂最终吸氢6.0 MPa.l仍没有饱和,证明了吸气剂的强大吸氢能力。至今复合泵已成功应用在4台被动型氢钟上。
A novel type of vacuum system was re-designed for the development of the passive hydrogen maser device,installed at Shanghai Astronomical Observatory.The newly-developed vacuum system consists of a non-evaporative getter（NEG） pump and a dedicated,miniaturized ion pump.At an ion current of 0.30 μA of the 2 l/s ion pump,the base pressure of the vacuum system reached 3.2×10-5 Pa after 2.1 MPa·l hydrogen was absorbed by the getter pump at room temperature.Besides,the new vacuum system is capable of working for over 13 years.After the reactivated getter pump absorbed over 6.0 MPa·l hydrogen,it could still absorb more hydrogen,indicating that its full absorption capacity was far from being reached.The new vacuum systems have been successfully operating for over three years in the four passive hydrogen maser devices with satisfactory results.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2012年第4期337-340,共4页
Chinese Journal of Vacuum Science and Technology
