小型铯束管内防止液态铯溢出炉口的机理研究  

MECHANISM DISCUSSION ON PREVENTING LIQUID CESIUM TO SPILL FROM THE ORIFICE OF AN OVEN INSIDE SMALL CBT

作　　者：杨军[1] 张涤新[1] 陈江[1] 王骥[1] 朱宏伟[1] 马寅光[1] 

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空与低温》2015年第6期320-325,共6页Vacuum and Cryogenics

基　　金：国家自然科学基金资助项目(61471183;11204116);国家青年科学基金资助项目(51304100)

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.

关 键 词：液态铯 防溢 多孔材料 气液分离 

分 类 号：R852.82[医药卫生—航空、航天与航海医学]