Design of a multiple-reflection time-of-flight mass spectrometer for barium-tagging

with the nEXO collaboration

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The search for neutrinoless double beta decay requires increasingly advanced methods of background reduction. A bold approach to solving this problem, in experiments using 136Xe, is to extract and identify the daughter 136Ba ion produced by double beta decay. Tagging events in this manner allows for a virtually background-free verification of double beta decay signals. Various approaches are being pursued by the nEXO collaboration to achieve Ba-tagging. A Multi-Reflection Time-of-Flight Mass Spectrometer (MR TOF) has been designed and optimized as one of the ion-identification methods, where it will investigate the ion-extraction efficiency, as well as provide further identification of the Ba isotope. The envisioned mode of operation allows the MR TOF to achieve a quickly adjustable mass-range and resolution, with simulations suggesting that a mass-resolving power of 140,000 is within reach. This work will discuss the MR TOF design and the methods employed to simulate and optimize it.

Original languageEnglish
Article number97
JournalHyperfine Interactions
Volume240
Issue number1
DOIs
StatePublished - Dec 1 2019
Externally publishedYes

Funding

We thank Timo Dickel, at GSI, and T. Eronen, at the University of Jyväskylä, for helpful discussions concerning the design of the MRTOF. We also thank Maxime Brodeur and Brad Schulz for supplying information and designs of the MR TOF at the University of Notre Dame. We would also like to thank the members of the nEXO collaboration, for their support and guidance. A special thanks also to Thanh Nguyen, for useful feedback on this manuscript. This work has been supported by NSERC, the Canadian Foundation for Innovation, and the McDonald Institute (CFREF) in Canada. nEXO is supported by the Offices of Nuclear and High Energy Physics within DOE’s Office of Science, and NSF in the United States; by NSERC, CFI, FRQNT, NRC, and the McDonald Institute (CFREF) in Canada; by SNF in Switzerland; by IBS in Korea; by RFBR in Russia; and by CAS and ISTCP in China. Acknowledgements

Keywords

  • Barium-tagging
  • Broadband mass measurement
  • Mass Spectrometry
  • MR TOF

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