Precision measurement of the transition energy γt versus magnetic rigidity for storage-ring isochronous mass spectrometry
Precision measurement of the transition energy γt versus magnetic rigidity for storage-ring isochronous mass spectrometry
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存储环等时质谱分析中跃迁能 γt 与磁刚度的精确测量
DOI：
10.1016/j.nima.2022.166329
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Jie
中科院分区：
文献类型：
--
作者：
M. Zhang;Yuhu Zhang;M. Wang;X. K. Zhou;Y. Yuan;X. L. Yan;Y. M. Xing;C. Y. Fu;R.J. Chen;X. W. Xu;P. Shuai;Q. Zeng;M. Z. Sun;Hongfu Li;M. Si;Qun-Yao Wang;Tianwei Bao;Han-Yu Deng;M. Z. Liu;Ting Liao;Jin-Yang Shi;Yu-Nan Song;H.Y. Jiao;X. K. Zhou;H. S. Xu;Jie
重离子储存环的跃迁能γ t是一个重要的机械参数。在环的接受范围内，γ t与磁刚度B ρ的变化直接影响高精度等离子体质谱（IMS）中可实现的质量分辨能力。通过安装在环的直线部分中的两个飞行时间（TOF）检测器，可以同时测量每个存储离子的旋转频率（旋转时间）和速度。利用这些量，发展了一种快速精确测定γ t的方法。得到了γ t与轨道长度（或B ρ）的关系。新开发的方法不需要粒子识别，因此适合于在实验过程中的离子光学设置的实时监测。
The transition energy, γ t , of a heavy-ion storage ring is an important machine parameter. The variation of γ t versus the magnetic rigidity, B ρ , over the acceptance of the ring directly affects the mass resolving power achievable in the high-precision isochronous mass spectrometry (IMS). With two time-of-flight (TOF) detectors installed in a straight section of the ring, revolution frequency (revolution time) and velocity of each stored ion can simultaneously be measured. By using these quantities, a method for fast and precise γ t determinations has been developed. The dependence of γ t on the orbit length (or B ρ ) has been obtained. The newly developed method does not require particle identification and is thus suitable for real-time monitoring of the ion optical setting during experiment.