小型化锶原子束系统的研制

Preparation of a miniaturized strontium atomic beam system

通过实验完成了对锶原子束锁频系统的小型化研制,系统的长度由85 cm小型化至45 cm,真空腔窗口的直径由35 mm减至16 mm,真空管法兰接口的规格CF35换成了CF16。采用激光诱导荧光的方法测量小型化系统热原子束的原子通量。通过对探测器响应效率的测量,将对荧光功率的测量转化成探测器响应电压的测量。由于原子通量与荧光功率成正比例关系,因此进而得到热原子束的原子通量。实验测得该小型化系统的原子通量满足锶原子光晶格钟实验需求。

A miniaturized strontium atomic beam frequency-locking system has been developed experimentally. The length of the system has been reduced from 85 cm to 45 cm, the diameter of vacuum chamber window has been reduced from 35 mm to 16 mm and the vacuum flange interface specification CF35 has been replaced by CF16. The atomic flux of the thermal atomic beam for the miniaturized system was measured with the method of laser induced fluorescence. The measurement of the fluorescence power was converted into the measurement of the detector response voltage through measuring the efficiency of the detector response. The atomic flux of thermal atomic beam was obtained, since the atomic flux is proportional to the fluorescence power. The measured atomic flux for the miniaturized system meets the demand from the experiment of strontium atom optical lattice clock.