Measurement of the lifetime and the proportion of 12C3+ ions in stored relativistic ion beams as a preparation for laser cooling experiments at the CSRe

被引:6
作者
Wang, H. B. [1 ,2 ]
Wen, W. Q. [1 ]
Huang, Z. K. [1 ,2 ]
Zhang, D. C. [1 ]
Hai, B. [1 ,2 ]
Zhu, X. L. [1 ]
Zhao, D. M. [1 ]
Yang, J. [1 ]
Li, J. [1 ]
Li, X. N. [1 ]
Mao, L. J. [1 ]
Mao, R. S. [1 ]
Wu, J. X. [1 ]
Yang, J. C. [1 ]
Yuan, Y. J. [1 ]
Eidam, L. [3 ]
Winters, D. [3 ]
Beck, T. [4 ]
Kiefer, D. [4 ]
Rein, B. [4 ]
Walther, Th. [4 ]
Loeser, M.
Schramm, U. [5 ]
Siebold, M. [5 ]
Bussmann, M. [5 ]
Ma, X. [1 ]
机构
[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
[4] Tech Univ Darmstadt, Inst Angew Phys, D-64289 Darmstadt, Germany
[5] Helmholtz Zentrum Dresden Rossendorf, D-01328 Dresden, Germany
基金
中国国家自然科学基金;
关键词
Storage ring; Laser cooling; Electron cooling; Schottky pick-up; SPECTROSCOPY; SYSTEM; C3+;
D O I
10.1016/j.nimb.2017.03.096
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We report on an experiment that was conducted in preparation of laser cooling experiments at the heavy-ion storage ring CSRe. The lifetimes of ion beams made up of C-12(3+) and O-16(4+) ions stored at an energy of 122 MeV/u in the CSRe were determined by two independent methods, firstly via a DC current transformer (DCCT) and secondly via a Schottky resonator. Using electron-cooling, the signals of the C-12(3+) and O-16(4+) ions could be separated and clearly observed in the Schottky spectrum. The obtained individual lifetimes of the C-12(3+) and O-16(4+) components were 23.6 s and 17.8 s, respectively. The proportion of C-12(3+) ions in the stored ion beam was measured to be more than 70% at the beginning of the injection and increasing as a function of time. In addition to these measurements, the operation and remote control of a pulsed laser system placed directly next to the storage ring was tested in a setup similar to the one envisaged for future laser experiments. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:280 / 284
页数:5
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