【作者】 郭忠言； 肖国青； 詹文龙； 徐瑚珊； 孙志宇； 李加兴； 王金川； 胡正国； 李琛； 陈立新； 毛瑞士； 祁辉荣；

【Author】 GUO Zhong-yan,XIAO Guo-qing,ZHAN Wen-long,XU Hu-shan,SUN Zhi-yu,LI Jia-xing,WANG Jin-chuan,HU Zheng-guo,LI Chen,CHEN Li-xin,MAO Rui-shi,QI Hui-rong(Institute of Modem Physics,CAS,Lanzhou of Gansu Prov.730000,China)

【机构】 中国科学院近代物理研究所；

【摘要】 描述了RIBLL的一些重要改进与升级。RIBLL本身的发展包括:将磁铁长度增加40%的新四极透镜替换原四极透镜Q1、Q2、Q9,加强它们聚焦能力。增加2台二极磁铁主电源,将辅助电源功率提高1倍。每台二极磁铁由各自独立的主电源和辅助电源供电,增加了二极磁铁磁刚度的调整范围,使得RIBLL能够分析中子滴线附近的放射性核素。将Q1、Q2、Q7、Q8、Q9、Q10磁铁的真空管道改造为方型截面和方喇叭型,使得RIB包络完全包容于真空管道内部,提高了RIBLL的传输效率。T0初级靶室,C1、C2测试室L1、L2靶室改为方型结构,使得安装束流诊断元件和实验测量探测器更加准确、方便、快捷。初级靶室前添加超重实验靶室和速度选择器,使得超重元素合成实验可以有效利用RIBLL进行较好的粒子鉴别和衰变特性等测量。RIBLL束流诊断技术的发展主要为:100mm×100mm双维位置灵敏平行板雪崩室(PPAC)作为RIBLL节点束流剖面探测器提高了设置、调整RIBLL参数的准确性和效率,提高了RIB的质量。将塑料闪烁探测器引入初级靶室,监测低初级束流,确保RIBLL线上后续各类探测器的安全。更多还原

【Abstract】 The progress on RIBLL is shown in this article. The magnetic domains of the quadrode Q2,Q7,Q10,are elongated 40% than old one’s. So their focus powers are going to be stronger. Each dipolar is supplied respectively by a master and an auxiliary power. And the power of auxiliary is increased from 180 A to 300A. In this way, the neutron drip-line isotopes can be separated nicely in RIBLL. The Q1,Q2,Q7,Q8,Q9,Q10 vacuum tubes are shaped into rectangle profile. The RIB transfer efficiency is increased obviously. The chambers of T0,C1,C2,T1 and T2 are made into rectangle section. It is much easy, shortcut and exact to setup the detectors. The Wien - filter velocity selector is installed in the front of RIBLL. The superheavy element synthesis is coming a great probability. Two dimensional position sensitive PPAC with area of 100mm×100mm are used in measuring RIB profile. It is improved immediately to tuning RIBLL.更多还原