An improvement of isochronous mass spectrometry: Velocity measurements using 
two time-of-flight detectors

Shuai, P.; Xu, X.; Zhang, Y.H.; Xu, H.S.; Litvinov, Yuri A.; Wang, M.; Tu, X.L.; Blaum, Klaus; Zhou, X.H.; Yuan, Y.J.; Yan, X.L.; Chen, X.C.; Chen, R.J.; Fu, C.Y.; Ge, Z.; Huang, W.J.; Xing, Y.M.; Zeng, Q.

doi:10.1016/j.nimb.2016.02.006

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An improvement of isochronous mass spectrometry: Velocity measurements using two time-of-flight detectors

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Litvinov, Yuri A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Key Laboratory of High Precision Nuclear Spectroscopy, Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China;
GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany;

Tu, X.L.
Key Laboratory of High Precision Nuclear Spectroscopy, Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China;
GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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http://www.sciencedirect.com/science/article/pii/S0168583X16001233
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Zitation

Shuai, P., Xu, X., Zhang, Y., Xu, H., Litvinov, Y. A., Wang, M., et al. (2016). An improvement of isochronous mass spectrometry: Velocity measurements using two time-of-flight detectors. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 376, 311-315. doi:10.1016/j.nimb.2016.02.006.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002A-F3B5-E

Zusammenfassung

Isochronous mass spectrometry (IMS) in storage rings is a powerful tool for mass measurements of exotic nuclei with very short half-lives down to several tens of microseconds, using a multicomponent secondary beam separated in-flight without cooling. However, the inevitable momentum spread of secondary ions limits the precision of nuclear masses determined by using IMS. Therefore, the momentum measurement in addition to the revolution period of stored ions is crucial to reduce the influence of the momentum spread on the standard deviation of the revolution period, which would lead to a much improved mass resolving power of IMS. One of the proposals to upgrade IMS is that the velocity of secondary ions could be directly measured by using two time-of-flight (double TOF) detectors installed in a straight section of a storage ring. In this paper, we outline the principle of IMS with double TOF detectors and the method to correct the momentum spread of stored ions.