2018/05/04 by R. J. Chen, R.J. Chen, X. L. Yan +49
Chemistry · Environmental Science · Physics and Astronomy · #Algorithm #Chemistry #Computer science #Context (archaeology) #Database #Energy (signal processing) #Isotope Analysis in Ecology #Mass Spectrometry Techniques and Applications #Measure (data warehouse) #Nuclear physics research studies #Optics #Physics #Quantum mechanics #Ring (chemistry) #Storage ring #nucl-ex #physics.ins-det
paper · pdf · doi:10.1016/j.nima.2018.04.056
7 pages
openalex publication_date 2018/05/04 · openalex created_date 2018/05/17 · arxiv created 2018/11/22 · arxiv updated 2018/11/26 · openalex updated_date 2026/08/05
The Isochronous Mass Spectrometry (IMS) is a powerful technique developed in heavy-ion storage rings for measuring masses of very short-lived exotic nuclei. The IMS is based on the isochronous setting of the ring. One of the main parameters of this setting is the transition energy γt. %The transition energy γt plays an important role in the isochronous mass spectrometry (IMS). It has been a challenge to determine the γt and especially to monitor the variation of γt during experiments. In this paper we introduce a method to measure the γt online during IMS experiments by using the acquired experimental data. Furthermore, since the storage ring has (in our context) a relatively large momentum acceptance, the variation of the γt across the ring acceptance is a source of systematic uncertainty of measured masses. With the installation of two time-of-flight (TOF) detectors, the velocity of each stored ion and its revolution time are simultaneously available for the analysis. These quantities enabled us to determine the γt as a function of orbital length in the ring. The presented method is especially important for future IMS experiments planned at the new-generation storage ring facilities FAIR in Germany and HIAF in China.