丰中子超重核研究原理性谱仪气体单元低温纯化系统的研制  

Development of Gas Cell Cryogenic Purification System Operating at Prototype Spectrometer for Neutron-rich Superheavy Nuclei

作　　者：李金海 侯东升 朱浩钒 范锐 徐新星[1,2,3] 周小红 刘忠[1,2] 李朋杰 王凯龙[1] 刘嘉健 黄燃 简豪[1,2] 高雨枫 戴凡超 查思贤 常志芳 覃淑炼 孔成 阎赫轩 徐浩维 尹国庆 王沛 张军辉 何源 王猛[1,2,3] 孙志宇[1,2,3] 胡正国 徐瑚珊[1,2,3] LI Jinhai;HOU Dongsheng;ZHU Haofan;FAN Rui;XU Xinxing;ZHOU Xiaohong;LIU Zhong;LI Pengjie;WANG Kailong;LIU Jiajian;HUANG Ran;JIAN Hao;GAO Yufeng;DAI Fanchao;ZHA Sixian;CHANG Zhifang;QIN Shulian;KONG Cheng;YAN Hexuan;XU Haowei;YIN Guoqing;WANG Pei;ZHANG Junhui;HE Yuan;WANG Meng;SUN Zhiyu;HU Zhengguo;XU Hushan(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516003,Guangdong,China;Vacree technologies Co.,Ltd,Hefei 230000,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学核科学与技术学院,北京100049 [3]先进能源科学与技术广东省实验室,广东惠州516003 [4]安徽万瑞冷电科技有限公司,合肥230000

出　　处：《原子核物理评论》2024年第1期135-140,共6页Nuclear Physics Review

基　　金：中国科学院战略性先导科技专项(XDB34010300);中国科学院改善科研条件专项(GSZXKYZB20220190);国家自然科学基金资助项目(12022501,12105329)。

摘　　要：重锕系核弹靶组合的多核子转移反应可能是产生丰中子超重核的重要突破口,因此设计建造适用于多核子转移反应的丰中子超重核研究的原理性谱仪不仅可以为探索超重核稳定岛奠定技术、方法和装置基础,而且对研究多核子转移反应机制有重要意义。丰中子超重核研究原理性谱仪中的气体单元需要持续不断的高纯度氦气,以停阻多核子转移反应产物并将降能后的离子引出到后续的实验装置。主要介绍新研制的丰中子超重核研究原理性谱仪气体单元低温纯化系统,此系统主要为气体单元提供可循环的高纯度氦气。经实验测定,低温纯化系统可以将99%的氦气纯化到99.999%以上,结合化学纯化单元,纯化后的氦气满足气体单元对高纯度氦气的需求。Multinucleon transfer reactions involving heavy actinide projectile and target nuclei hold significant potential as a groundbreaking method to synthesize neutron-rich superheavy nuclei.Constructing a Prototype Spectrometer for Neutron-rich Superheavy Nuclei is highly desirable to establish the technical,methodological,and device foundation to explore the stability island in superheavy nuclei and to study the mechanism of multinucleon transfer reactions.The gas cell of the Prototype Spectrometer for Neutron-rich Superheavy Nuclei requires a continuous supply of high-purity helium gas to stop the energetic radioactive reaction products and to extract the energy-reduced ions to the subsequent experimental setup.The paper focuses on a newly developed Gas Cell Cryogenic Purification System operating at Prototype Spectrometer for Neutron-rich Superheavy Nuclei.This system is designed to provide recyclable and high-purity helium for the gas cell.With a series of tests,the cryogenic purification system has been proven to be able to purify the 99% helium gas to 99.999% or higher,fulfilling the requirements of the gas cell when used in conjunction with the chemical purification system.

关 键 词：多核子转移反应 气体单元 低温纯化系统 高纯度氦气 

分 类 号：O571.1[理学—粒子物理与原子核物理]