Conference paper

Publication year: 2008

Pages: 4560-4564

Journal: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

Volume number: 266

Issue number: 19-20

ISSN: 0168-583X

eISSN: 1872-9584

DOI Link: https://doi.org/10.1016/j.nimb.2008.05.079

Conference: 15th International Conference on Electromagnetic Isotope Separators and Techniques Related to their Applications

Publisher: Elsevier

Abstract: 
A multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) system for low-energy radioactive ion beam facilities has been developed, which can be used for (i) isobar separation and (ii) direct mass measurements of very short-lived nuclei with half-lives of about 1 ms or longer, and (iii) for identification and diagnosis of the ion beam by mass spectrometry. The system has been designed and simulated, and individual subsystems have been built and characterized experimentally. An injection trap for cooling and bunching of the ion beam has been developed, and cooling times of less than one millisecond have been achieved. The performance of the MR-TOF-MS was characterized using the isobaric doublet of carbon monoxide and nitrogen molecular ions. A mass resolving power of 10(5) (FWHM) has been obtained even with an uncooled ion population. The separator capabilities of the MR-TOF-MS have been demonstrated by removing either carbon monoxide or nitrogen ions from the beam in a Bradbury-Nielsen Gate after a flight time of 320 mu s. The separation power achieved is thus at least 7000 (FWHM) and increases for longer time-of-flight. An energy buncher stage has been designed that compresses the energy spread of the beam after the separation and facilitates efficient injection of the selected ions into in accumulation trap prior to transfer of the ions to experiments downstream of the MR-TOF-MS. (c) 2008 Elsevier B.V. All rights reserved.

Harvard Citation style: Plass, W., Dickel, T., Czok, U., Geissel, H., Petrick, M., Reinheimer, K., et al. (2008) Isobar separation by time-of-flight mass spectrometry for low-energy radioactive ion beam facilities, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 266(19-20), pp. 4560-4564. https://doi.org/10.1016/j.nimb.2008.05.079

APA Citation style: Plass, W., Dickel, T., Czok, U., Geissel, H., Petrick, M., Reinheimer, K., Scheidenberger, C., & Yavor, M. (2008). Isobar separation by time-of-flight mass spectrometry for low-energy radioactive ion beam facilities. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 266(19-20), 4560-4564. https://doi.org/10.1016/j.nimb.2008.05.079