氢脉泽束光学系统的改进设计

Improved Design of Beam Optics Configuration for Hydrogen Masers

本文对氢脉泽传统的束光学系统提出了应用四极锥形内孔的短态选择器和双聚焦态选择器两种改进设计．推导了四极锥形态选择器束光学系统的设计公式，为实际设计需要提供了一定理论依据，经分析计算，它与六极态选择器相比，有效利用束流，聚焦速度快，缩短了原子束轨道．双聚焦态选择器排除了不需要的F＝1，mF＝1能级的原子，使进入储存胞的原子为振荡所需的F＝1；mF＝0上的有用原子，降低了原子自旋碰撞效应，使线宽减小．新的原子束光学系统有利于氢脉泽性能的提高．

This paper provides two improved designs including the quadrupole state selector with tapered bore and the double focalization state selector for the conventional beam optics configuration of a hydrogefl maser. The equations of beam optics configuration of the quadrupole state selector with tapered bore is deduced,which provides the theoretical basis of the desigll, Calculations compared with the hexapole state selector show that the quadrupole state selector could achieve much more efficient use of source flux, focus rapidly, and short the atomic beam trajectory.The double focalization state selector eliminates the undesirable atoms in the F = 1,mF = 1 state, and focuses desired atoms in the F = 1, mF = 0 state for maser oscillation into the storage bulb. It could reduce the atodric spin exchange collision effects, and decrease the linewidth. The new atomic beam optics configurations are helpful to improve the performances of a hydrogen maser.