A miniature atomic scalar magnetometer based on the rubidium isotope 87Rb was developed for operation in space. The instrument design implements both Mx and Mz mode operation and leverages a novel microelectromechanical system (MEMS) fabricated vapor cell and a custom silicon‐on‐sapphire (SOS) complementary metal‐oxide‐semiconductor (CMOS) integrated circuit. The vapor cell has a volume of only 1 mm3 so that it can be efficiently heated to its operating temperature by a specially designed, low‐magnetic‐field‐generating resistive heater implemented in multiple metal layers of the transparent sapphire substrate of the SOS‐CMOS chips. The SOS‐CMOS chip also hosts the Helmholtz coil and associated circuitry to stimulate the magnetically sensitive atomic resonance and temperature sensors. The prototype instrument has a total mass of fewer than 500 g and uses less than 1 W of power, while maintaining a sensitivity of 15 pT/√Hz at 1 Hz, comparable to present state‐of‐the‐art absolute magnetometers.
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机译:开发了基于<同位素 87 sup> Rb的微型原子标量磁力计,用于太空操作。该仪器设计同时实现了Mx和Mz模式操作,并利用了新型的微机电系统(MEMS)制成的蒸汽电池和定制的蓝宝石硅(SOS)互补金属氧化物半导体(CMOS)集成电路。蒸汽电池的体积仅为1 mm 3 sup>,因此可以通过在蒸汽炉的多个金属层中实现的特殊设计的低磁场产生电阻加热器将其有效地加热到其工作温度。 SOS-CMOS芯片的透明蓝宝石衬底。 SOS-CMOS芯片还托管了亥姆霍兹线圈和相关电路,以激发对磁敏感的原子共振和温度传感器。原型仪器的总质量小于500μg,使用的功率小于1μW,同时在1μHz的频率下保持15μpT/√Hz的灵敏度,与目前的最新绝对磁力计相当。
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