Recent upgrades of the multiple-reflection time-of-flight mass spectrometer at TITAN, TRIUMF

Abstract

A multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) has been installed and integrated into the TITAN experiment at TRIUMF. The MR-TOF-MS extends the capabilities and improves the performance of the TITAN experiment, for instance it provides fast isobar separation, short measurement cycles, yield measurements and broad-band beam diagnosis, and enhanced rate capabilities and dynamic range. Thereby, even more exotic nuclides become accessible at TITAN for experiments. Such improved capabilities of TITAN have been used in first experiments to investigate the sub-shell closure of neutron-rich nuclides at N = 32 and the r-process nucleo-synthesis for masses at A ∼ 85. The vacuum system, electronics and data-acquisition hardware and software have been recently upgraded. For the first time an isomeric state has been measured with TITANs MR-TOF-MS, 84mRb (excitation energy: 464 keV). The accurate measurement of excitation energies of low-lying isomeric states is possible due to the high mass resolving power of TITANs MR-TOF-MS and a specialized data-analysis procedure.

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Acknowledgements

We want to thanks Ryan Ringle for valuable input and discussion in the development of the peak identification routines. We thank Christian Lotze for his work on the voltage control software. This work was supported by National Science and Engineering Research Council of Canada (NSERC), federal funding through TRIUMF by the National Research Council of Canada (NRC), by the German Federal Ministry for Education and Research (BMBF) under under contracts no. 05P19RGFN1, 05P12RGFN8 and 05P15RGFN1, by Justus-Liebig-Universität Gießen and GSI under the JLU-GSI strategic Helmholtzpartnership agreement, by HGS-HIRe, and by the Hessian Ministry for Science and Art (HMWK) through the LOEWE Center HICforFAIR and the LOEWE Focus AmbiProbe.

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Correspondence to Timo Dickel.

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This article is part of the Topical Collection on Proceedings of the 7th International Conference on Trapped Charged Particles and Fundamental Physics (TCP 2018), Traverse City, Michigan, USA, 30 September–5 October 2018

Edited by Ryan Ringle, Stefan Schwarz, Alain Lapierre, Oscar Naviliat-Cuncic, Jaideep Singh and Georg Bollen

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Dickel, T., San Andrés, S.A., Beck, S. et al. Recent upgrades of the multiple-reflection time-of-flight mass spectrometer at TITAN, TRIUMF. Hyperfine Interact 240, 62 (2019). https://doi.org/10.1007/s10751-019-1610-y

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Keywords

  • Mass measurements
  • MR-TOF-MS
  • Exotic nuclides
  • Isomers
  • Instrument control
  • On- and offline data-analysis