Development of a cryogenic multipole ion trap for isomeric separation with MRToF mass spectrometry

• Project/Area Number: 18K13573
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Rosenbusch Marco 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 基礎科学特別研究員 (50790945)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
• Keywords: ion traps / small ion traps / mass spectrometry / multi-reflection devices / precision physics / multi reflection devices / ion cooling / precision measurements / nuclear masses

Outline of Final Research Achievements

In this research project, new concepts towards microscopic multipole traps have been investigated and several possibilities have been tested in the experiment. We accomplished several tests of small trapping systems as used for extraction of ions from a gas-catcher cell. Experience has also been obtained for the cryogenic operation of a previously existing Paul trap during various on-line experiments over the period of the grant.
The final goal of an independent microscopic multipole trap coupled to a mass spectrometer is further pending, but can be accomplished using the existing devices. By the experience obtained up to date, planar trap designs (i.e. printed electrodes on an insulating board) are most promising for the realization of the trapping structures. Trapping systems with smaller volumes are necessary and can be realized by more narrow electrode boundaries, so that the motional space of the ions is restricted to enable a meaningful combination with a mass spectrometer.

Academic Significance and Societal Importance of the Research Achievements

Nuclear isomers separated by their mass offer unique opportunities to precisely study masses of superheavy elements on the search for the island of stability. This research project is focused on the realization of very high resolving powers of fast mass spectrometers to enable isomeric resolution.

Research Products

• [Journal Article] First steps in the development of the Multi Ion Reflection Apparatus for Collinear Laser Spectroscopy (2020)
  • Author(s): Sels S.、Fischer P.、Heylen H.、Lagaki V.、Lechner S.、Maier F.M.、Plattner P.、Rosenbusch M.、Wienholtz F.、Wolf R.N.、N?rtersh?user W.、Schweikhard L.、Malbrunot-Ettenauer S.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Volume: 463 Pages: 310-314
  • DOI: 10.1016/j.nimb.2019.04.076
• [Journal Article] A new multi-reflection time-of-flight mass spectrograph for the SLOWRI facility (2020)
  • Author(s): Rosenbusch M.、Wada M.、Schury P.、Ito Y.、Ishiyama H.、Ishizawa S.、Hirayama Y.、Kimura S.、Kojima T.M.、Miyatake H.、Moon J.Y.、Niwase T.、Sonoda T.、Takamine A.、Watanabe Y.X.、Wollnik H.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Volume: 463 Pages: 184-188
  • DOI: 10.1016/j.nimb.2019.05.058
  • Peer Reviewed
• [Journal Article] High-stability, high-voltage power supplies for use with multi-reflection time-of-flight mass spectrographs (2020)
  • Author(s): Schury P.、Wada M.、Wollnik H.、Moon J.-Y.、Hashimoto T.、Rosenbusch M.
  • Journal Title: Review of Scientific Instruments Volume: 91 Issue: 1 Pages: 014702-014702
  • DOI: 10.1063/1.5104292
  • Peer Reviewed
• [Journal Article] Development of an “α-TOF” detector for correlated measurement of atomic masses and decay properties (2020)
  • Author(s): Niwase T.、Wada M.、Schury P.、Haba H.、Ishizawa S.、Ito Y.、Kaji D.、Kimura S.、Miyatake H.、Morimoto K.、Morita K.、Rosenbusch M.、Wollnik H.、Shanley T.、Benari Y.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 953 Pages: 163198-163198
  • DOI: 10.1016/j.nima.2019.163198
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A multi-reflection time-of-flight setup for the improvement and development of new methods and the study of atomic clusters (2019)
  • Author(s): Knauer S.、Fischer P.、Marx G.、M?ller M.、Rosenbusch M.、Schabinger B.、Schweikhard L.、Wolf R.N.
  • Journal Title: International Journal of Mass Spectrometry Volume: 446 Pages: 116189-116189
  • DOI: 10.1016/j.ijms.2019.116189
• [Journal Article] Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in At217,218,219 revealed by in-source laser spectroscopy (2019)
  • Author(s): Barzakh A. E.、Cubiss J. G.、et al.
  • Journal Title: Physical Review C Volume: 99 Issue: 5 Pages: 54317-54317
  • DOI: 10.1103/physrevc.99.054317
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Mass measurements of neutron-rich isotopes near N=20 by in-trap decay with the ISOLTRAP spectrometer (2019)
  • Author(s): Ascher P.、Althubiti N.、Atanasov D.、Blaum K.、Cakirli R. B.、Gr?vy S.、Herfurth F.、Kreim S.、Lunney D.、Manea V.、Neidherr D.、Rosenbusch M.、Schweikhard L.、Welker A.、Wienholtz F.、Wolf R. N.、Zuber K.
  • Journal Title: Physical Review C Volume: 100 Issue: 1 Pages: 014304-014304
  • DOI: 10.1103/physrevc.100.014304
• [Journal Article] Evaluation of high-precision atomic masses of A ? 50?80 and rare-earth nuclides measured with ISOLTRAP (2019)
  • Author(s): Huang W. J.、Atanasov D.、Audi G.、Blaum K.、Cakirli R. B.、Herlert A.、Kowalska M.、Kreim S.、Litvinov Yu. A.、Lunney D.、Manea V.、Mougeot M.、Rosenbusch M.、Schweikhard L.、Welker A.、Wienholtz F.、Wolf R. N.、Zuber K.
  • Journal Title: The European Physical Journal A Volume: 55 Issue: 6 Pages: 96-96
  • DOI: 10.1140/epja/i2019-12775-5
• [Journal Article] Fluorescence detection as a new diagnostics tool for electrostatic ion beam traps (2019)
  • Author(s): Lechner Simon、Fischer Paul、Heylen Hanne、Lagaki Varvara、Maier Franziska、Plattner Peter、Rosenbusch Marco、Sels Simon、Wienholtz Frank、Wolf Robert N.、N?rtersh?user Wilfried、Schweikhard Lutz、Malbrunot-Ettenauer Stephan
  • Journal Title: Hyperfine Interactions Volume: 240 Issue: 1 Pages: 95-95
  • DOI: 10.1007/s10751-019-1628-1
• [Journal Article] Conceptual study on parasitic low-energy RI beam production with in-flight separator BigRIPS and the first stopping examination for high-energy RI beams in the parasitic gas cell (2019)
  • Author(s): Sonoda T、Katayama I、Wada M、Iimura H、Sonnenschein V、Iimura S、Takamine A、Rosenbusch M、Kojima T M、Ahn D S、Fukuda N、Kubo T、Nishimura S、Shimizu Y、Suzuki H、Takeda H、Tanigaki M、Tomita H、Yoshida K、Ishiyama H
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2019 Issue: 11
  • DOI: 10.1093/ptep/ptz120
• [Journal Article] Improving wide-band mass measurements in a multi-reflection time-of-flight mass spectrograph by usage of a concomitant measurement scheme (2018)
  • Author(s): P. Schury, Y. Ito, M. Rosenbusch, H. Miyatake, M. Wada and H. Wollnik
  • Journal Title: Int. J. Mass Spectrom. Volume: 433 Pages: 40-46
  • DOI: 10.1016/j.ijms.2018.08.007
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes (2018)
  • Author(s): M. Rosenbusch, Y. Ito, P. Schury, M. Wada, D. Kaji, K. Morimoto, H. Haba, S. Kimura, H. Koura, M. MacCormick, H. Miyatake, J. Y. Moon, K. Morita, I. Murray, T. Niwase, A. Ozawa, M. Reponen, A. Takamine, T. Tanaka, and H. Wollnik
  • Journal Title: Phys. Rev. C Volume: 97 Issue: 6 Pages: 064306-064306
  • DOI: 10.1103/physrevc.97.064306
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph (2018)
  • Author(s): Ito Y.、Schury P.、Wada M.、Arai F.、Haba H.、Hirayama Y.、Ishizawa S.、Kaji D.、Kimura S.、Koura H.、MacCormick M.、Miyatake H.、Moon J.?Y.、Morimoto K.、Morita K.、Mukai M.、Murray I.、Niwase T.、Okada K.、Ozawa A.、Rosenbusch M.、Takamine A.、Tanaka T.、Watanabe Y.?X.、Wollnik H.、Yamaki S.
  • Journal Title: Physical Review Letters Volume: 120 Issue: 15 Pages: 152501-152501
  • DOI: 10.1103/physrevlett.120.152501
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph (2018)
  • Author(s): Kimura S.、Ito Y.、Kaji D.、Schury P.、Wada M.、Haba H.、Hashimoto T.、Hirayama Y.、MacCormick M.、Miyatake H.、Moon J.Y.、Morimoto K.、Mukai M.、Murray I.、Ozawa A.、Rosenbusch M.、Schatz H.、Takamine A.、Tanaka T.、Watanabe Y.X.、Wollnik H.
  • Journal Title: International Journal of Mass Spectrometry Volume: 印刷中 Pages: 134-142
  • DOI: 10.1016/j.ijms.2018.05.001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Precision mass measurements of 58-63Cr: study of nuclear collectivity towards the N=40 island of inversion (2018)
  • Author(s): M. Mougeot, D. Atanasov, K. Blaum, K. Chrysalidis, V. Fedosseev, D. Fedorov, S. George, T. Day Goodacre, F. Herfurth, J.D. Holt, D. Lunney, B. Marsh, V. Manea, D. Neidherr, S. Rothe, M. Rosenbusch, C. Seiert, L. Schweikhard, A. Schwenk, J. Simonis, S.R. Stroberg, A. Welker, F. Wienholtz, R. N. Wolf, and K. Zuber
  • Journal Title: Phys. Rev. Lett. Volume: 120 Issue: 23 Pages: 232501-232501
  • DOI: 10.1103/physrevlett.120.232501
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Characterization of the shape-staggering effect in mercury nuclei (2018)
  • Author(s): B. A. Marsh et al.
  • Journal Title: Nature Physics Volume: 14 Issue: 12 Pages: 1163-1167
  • DOI: 10.1038/s41567-018-0292-8
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Status and Future Plans for MRTOF Mass Measurements at RIKEN-RIBF (2018)
  • Author(s): Marco Rosenbusch
  • Organizer: Electromagnetic Isotope Separators (EMIS) at CERN
• [Presentation] MRTOF Mass Measurements at RIBF: Recent Measurements of Heavy Isotopes and Future Plans for the Super-Heavy Region (2018)
  • Author(s): Marco Rosenbusch
  • Organizer: TASCA workshop, GSI (Darmstadt)
  • Invited
• [Presentation] Recent successes of multi-reflection devices at RIKEN's RIBF facility and some thoughts about highly accurate mass calibration using ion traps (2018)
  • Author(s): Marco Rosenbusch
  • Organizer: 10th International Conference on Charged Particle Optics (CPO-10), Key West (Florida)
• [Presentation] Follow-Ups on Great Achievements: New MRTOF-MS Projects at RIKEN-RIBF (2018)
  • Author(s): Marco Rosenbusch
  • Organizer: Fifth joint meeting of the Division of Nuclear Physics of the American Physical Society (APS) with the nuclear physicists of the Physical Society of Japan (JPS)
  • Int'l Joint Research