外文题目: Automatic compensation of magnetic field for a rubidium space cold atom clock
作者: 李琳; 吉经纬; 任伟; 赵鑫; 彭向凯; 项静峰; 吕德胜; 刘亮
刊名: Chin. Phys. B
年: 2016 卷: 25 期: 7 文章编号：73201
英文关键词:
laser cooling; space cold atom clock; magnetic field compensation
CESIUM FOUNTAIN; PHARAO
英文摘要:
When the cold atom clock operates in microgravity around the near-earth orbit, its performance will be affected by the fluctuation of magnetic field. A strategy is proposed to suppress the fluctuation of magnetic field by additional coils, whose current is changed accordingly to compensate the magnetic fluctuation by the linear and incremental compensation. The flight model of the cold atom clock is tested in a simulated orbital magnetic environment and the magnetic field fluctuation in the Ramsey cavity is reduced from 17 nT to 2 nT, which implied the uncertainty due to the second order Zeeman shift is reduced to be less than 2 x 10(-16). In addition, utilizing the compensation, the magnetic field in the trapping zone can be suppressed from 7.5 mu T to less than 0.3 mu T to meet the magnetic field requirement of polarization gradients cooling of atoms.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1088/1674-1056/25/7/073201


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