Particle identification and revolution time corrections for the isochronous mass spectrometry in storage rings
Particle identification and revolution time corrections for the isochronous mass spectrometry in storage rings
复制标题
存储环中等时质谱的粒子识别和旋转时间校正
DOI：
10.1016/j.nima.2019.06.072
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Zhou X H
中科院分区：
文献类型：
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作者：
Xing Y M;Zhang Y H;Wang M;Litvinov Yu A;Chen R J;Chen X C;Fu C Y;Li H F;Shuai P;Si M;Sun M Z;Tu X L;Wang Q;Xu H S;Xu X;Yan X L;Yang J C;Yuan Y J;Zeng Q;Zhang P;Zhang M;Zhou X;Zhou X H
在贮存环上进行的等时质谱分析（IMS）中，通过精确测量短寿命核素的平均公转时间来确定其质量。然而，由于环磁场的不稳定性，旋转时间的分布可能会严重恶化。这成为粒子鉴定和质量测定的一个重要障碍。本文介绍了一种数据分析方法，可以在很大程度上消除磁场不稳定性对粒子识别和平均旋转时间造成的不确定性。我们证明，即使存储环的磁场变化缓慢，达到Δ B∕B ~ 10−4的水平，这种方法对于IMS实验也是非常有效的。
In the isochronous mass spectrometry (IMS) performed at storage rings, masses of short-lived nuclides are determined through precision measurements of their mean revolution times. However, the distribution of revolution times could be seriously deteriorated by instabilities of the ring’s magnetic fields. This becomes a significant obstacle for the particle identifications and mass determinations. A data analysis method is described in this paper which is able to largely remove the uncertainties caused by the magnetic field instabilities in the particle identifications and the mean revolution times. We show that this method is very effective for the IMS experiments even when the magnetic fields of a storage ring vary slowly up to a level of Δ B∕ B∼ 1 0− 4.