小型铯束管内防止液态铯溢出炉口的机理研究

摘要

为了提高地面及星载铯原子钟的性能，开展对国外相关铯原子频标中防止液态铯溢出热炉口关键技术的研究。基于国外地面和星载的两种小型磁选态铯束管内铯炉的设计案例，以液体和多孔材料为切入点，结合阻尼器和分离器的功能特性，阐述了多孔材料能有效防止液态铯溢出的物理机理，从流体力学的角度重点分析了影响多孔材料束缚液态铯的物性参数因素，强调了进一步优化防溢铯炉设计的关键点，这对于铯炉能够获得优质的铯原子束流是非常有益的。%For the domestic development of cesium atom clock with high performance and small volume,it is essen-tial to study on the oversea technology of preventing liquid cesium to spill from the orifice of an oven inside a small cesi-um beam tube(CBT). In this paper,based on the overseas cesium-ovens of ground and spaceborne CBTs,the authors clar-ified clearly the physical mechanism on how porous material could avoid liquid cesium to spill in a CBT by considering the especial roles of porous material and liquid in damper and separator,respectively. Furthermore,physical parameters of porous material were analyzed simply with a method of fluid dynamics. The key items of process design for spill-resistant oven were emphasized. All results are beneficial for yield of cesium beam with high quality.