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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。
Describes the experimental process of the Shanghai Astronomical Observatory in 2008 to improve the reliability of a passive hydrogen atomic clock vacuum system by a composite pump consisting of a non-evaporable getter pump and a small ion pump. The getter pump absorbs at room temperature 2.1 MPa.l after H2 gas can still reach the degree of vacuum 3.2 × 10-5Pa, 2l / s ion pump current work 0.30μA, proving that the composite pump can maintain the hydrogen for more than 13 years of normal work. After reactivation fixed the activation process, the final getter hydrogen absorption 6.0 MPa.l still no saturation, proved strong gettering hydrogen absorption capacity. So far the compound pump has been successfully applied to four passive hydrogen bell.