Research on Utilization Rate of Cesium Atoms in Optically Pumped Cesium Beam Tube

The main factors that affect the life of the cesium beam tube include the maintenance of vacuum degree inside the tube, the absorption capacity of cesium adsorbent and the cesium storage capacity of the cesium oven. For the magnetic state selection cesium beam tube, the life of the electron multiplier should also be considered. With the development of technology, the effect of cesium adsorbent and the maintenance of vacuum degree on the life of the beam tube have been very small, as the commercial optical pumping cesium beam tube (OPCBT) adopts the method of optical detection, the life of OPCBT can be calculated without considering the influence of multiplier. Therefore, this article focuses on flow and distribution of cesium atoms ejected from the cesium oven of OPCBT, points out the quantitative relationship among the oven temperature, the amount of cesium elemental and the life of cesium beam tube. According to the distribution of cesium atom, the utilization ratio of cesium atom was obtained, which provides a theoretical basis for the design of OPCBT structure.