6 pags. 5 figs.For the first time, the FRagment Separator (FRS) and the Multiple-Reflection Time-Of-Flight Mass-Spectrometer (MR-TOF-MS) particle identification (PID) systems at GSI have been coupled. This new approach adds to the standard FRS PID an additional unambiguous identification of the fragments and the possibility to identify and count long-lived isomeric states (>ms). For this purpose, single-event timestamp information given by a common clock was used to correlate both systems. Two methods were implemented to improve the signal-to-background ratio by more than a factor 2 in the high resolution mass spectrum obtained with the MR-TOF-MS for the 109In isotope. Moreover, the coupling of the systems allows an improvement in the on-line monitoring of the FRS-Ion Catcher (IC) efficiency and extraction time. In addition, range calculations were implemented in the on-line monitoring; a powerful tool for real-time optimization of stopped beam experiments.The ELI-NP group was supported by Extreme Light Infrastructure Nuclear Physics (ELI-NP), Germany Phase II, a project co-financed by the Romanian Government and the European Union through the European Regional Development Fund the Competitiveness Operational Programme (1/07.07.2016, COP,ID 1334) and by the Romanian Ministry of Research and Innovation under contract PN 19 06 01 05.
This work was supported by the German Federal Ministry for Education and Research (BMBF) under contracts No. 05P19RGFN1, 05P12RGFN8 and 05P15RGFN1, by Justus Liebig University Gießen, Germany and GSI, Germany under the JLU-GSI strategic Helmholtz partnership agreement, by HGS-HIRe, and by theHessian Ministry for Science and Art (HMWK), Germany.
O. Hall was supported by UKRI STFC, United Kingdom grant ST/P004008/1.Peer reviewe
