1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3 Hefei National Research Center for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; 4 Shanghai EBIT Laboratory, Institute of Modern Physics, Fudan University, and the Key Laboratory of Applied Ion Beam Physics, Chinese Ministry of Education, Shanghai 200433, China
Abstract Dielectronic recombination (DR) is one of the dominant electron-ion recombination mechanisms for most highly charged ions (HCIs) in cosmic plasmas, and thus, it determines the charge state distribution and ionization balance therein. To reliably interpret spectra from cosmic sources and model the astrophysical plasmas, precise DR rate coefficients are required to build up an accurate understanding of the ionization balance of the sources. The main cooler storage ring (CSRm) and the experimental cooler storage ring (CSRe) at the Heavy-Ion Research Facility in Lanzhou (HIRFL) are both equipped with electron cooling devices, which provide an excellent experimental platform for electron-ion collision studies for HCIs. Here, the status of the DR experiments at the HIRFL-CSR is outlined, and the DR measurements with Na-like Kr25+ ions at the CSRm and CSRe are taken as examples. In addition, the plasma recombination rate coefficients for Ar12+, 14+, Ca14+, 16+, 17+, Ni19+, and Kr25+ ions obtained at the HIRFL-CSR are provided. All the data presented in this paper are openly available at https://doi.org/10.57760/sciencedb.j00113.00092.
(Atomic, molecular, chemical, and grain processes)
Fund: This work was partly supported by the National Natural Science Foundation of China (Grant Nos. U1932207, 11904371, and 12104437) and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB34020000). We thank S. Schippers for fruitful discussions on the data analysis. W. Q. Wen acknowledges the support of the Youth Innovation Promotion Association CAS. The authors are deeply grateful to the staff of the Accelerator Department for the smooth running of the CSR accelerator complex.
Corresponding Authors:
Weiqiang Wen, Linfan Zhu, Xinwen Ma
E-mail: wenweiqiang@impcas.ac.cn;lfzhu@ustc.edu.cn;x.ma@impcas.ac.cn
Cite this article:
Zhongkui Huang(黄忠魁), Shuxing Wang(汪书兴), Weiqiang Wen(汶伟强), Hanbing Wang(汪寒冰), Wanlu Ma(马万路), Chongyang Chen(陈重阳), Chunyu Zhang(张春雨), Dongyang Chen(陈冬阳), Houke Huang(黄厚科), Lin Shao(邵林), Xin Liu(刘鑫), Xiaopeng Zhou(周晓鹏), Lijun Mao(冒立军), Jie Li(李杰), Xiaoming Ma(马晓明), Meitang Tang(汤梅堂), Jiancheng Yang(杨建成), Youjin Yuan(原有进), Shaofeng Zhang(张少锋), Linfan Zhu(朱林繁), and Xinwen Ma(马新文) Absolute dielectronic recombination rate coefficients of highly charged ions at the storage ring CSRm and CSRe 2023 Chin. Phys. B 32 073401
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Enhancement of electron-ion recombination rates at low energy range in the heavy ion storage ring CSRm Nadir Khan, Zhong-Kui Huang(黄忠魁), Wei-Qiang Wen(汶伟强), Shu-Xing Wang(汪书兴), Han-Bing Wang(汪寒冰), Wan-Lu Ma(马万路), Xiao-Long Zhu(朱小龙), Dong-Mei Zhao(赵冬梅), Li-Jun Mao(冒立军), Jie Li(李杰), Xiao-Ming Ma(马晓明), Mei-Tang Tang(汤梅堂), Da-Yu Yin(殷达钰), Wei-Qing Yang(杨维青), Jian-Cheng Yang(杨建成), You-Jin Yuan(原有进), Lin-Fan Zhu(朱林繁), Xin-Wen Ma(马新文). Chin. Phys. B, 2020, 29(3): 033401.
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