电磁法分离铷同位素用接收器的研制

Research of Receiver for Separating Rb Isotope

高丰度^(85) Rb和^(87) Rb是原子钟的核心工作物质,而电磁分离方法是获得高丰度铷同位素唯一可行的方法。接收器是电磁分离器的核心部件之一,分离不同的同位素,接收器的设计参数不同。为保证铷同位素的丰度达到使用要求,通过对接收器口袋参数的计算,确定了铷同位素接收器口袋的尺寸与位置,对口袋的材料与冷却温度进行理论计算,完成了口袋的优化,确定了口袋的冷却温度低于25℃,改善了接收器溅射和蒸发对同位素丰度影响的问题。目前,接收器已安装在同位素电磁分离器上,开展了铷同位素的分离实验,确定了理想的分离参数,接收到的铷同位素的丰度取得了突破。

85 Rb and 87 Rb isotopes with high enrichment are the core working material of the atomic clock.They can only be separated by electromagnetic isotope separator.The receiver system is an important part of this separator.The parameters of the receiver are different for separating the different isotopes.In order to get the request of the enrichment of isotopes,the parameter of the pocket,the design size and the position of the pocket for separating Rb isotope were calculated.The material and cooling temperature of the pocket were improved.The cooling temperature of the pocket is lower than25℃.The problem of the factor effecting the isotope’s enrichment was solved.And now the receiver was installed in the vacuum chamber of the separator,the experiments of 85 Rb and 87 Rb were developed,and the ideal working parameters were confirmed.Finally the enrichment of the isotope is exceeded.