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描述了一台在兰州放射性次级束流线(RIBLL)前端安装的速度选择器系统,该系统由2个三组合四极透镜组和1个正交的电磁场组成,将用于熔合蒸发余核的研究．介绍了该设备的设计思路、基本参数和本底抑制能力、传输效率、角度接收度以及动量接收度的测量结果．结果表明该系统达到设计要求,进行适当改造后可用于Z≤110的超重核素的研究和中重核区滴线核的研究．
Describes a speed selector system installed at the front of a radioactive secondary beam line (RIBLL) in Lanzhou. The system consists of two triple quadrupole lens modules and an orthogonal electromagnetic field that will be used to fuse the residual nuclei Research. The design concept, basic parameters and background suppression, transmission efficiency, angle acceptance and momentum acceptance are introduced. The results show that the system meets the design requirements and can be used for the research of overweight nuclides with Z≤110 and drip line nuclei in the middle and heavy nuclear regions.