2018 Fiscal Year Research-status Report
Development of a cryogenic multipole ion trap for isomeric separation with MRToF mass spectrometry
| Project/Area Number |
18K13573
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| Research Institution | Institute of Physical and Chemical Research |
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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)
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| Project Period (FY) |
2018-04-01 – 2020-03-31
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| Keywords | ion traps / small ion traps / mass spectrometry / multi-reflection devices / precision physics |
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| Outline of Annual Research Achievements |
For the planned experiment, the purchase of most of the required radio-frequency components has been accomplished. The goal is to enable a guiding-field frequency of up to 50MHz and above 100V peak-to-peak voltage. A new radio-frequency amplifier was purchased and a corresponding Frequency generator that allows to use frequencies in the required region. In the present trap design it is intended to have an inner trap diameter of only 500 micrometer, which requires a correspondingly high frequency for the guiding field to store the ions successfully. Simulations for the optimum parameters are presently ongoing and show that the design of the trap may be altered before the production for reasons of producibility. At present a possible manufacturer for the trap body is missing and thus the design may be changed from a classical trap form containing rods on a holder (see proposal) to become a version where small rings separated by insulator rings are stacked to form a so-called ring-type multipole trap. The RF field oscillated between the rings and prevents the ions from leaving the trap volume, which is a similar trapping effect as compared to the original design from the proposal. The DC field to trap and eject the ions can be applied over the stack using a resistor chain.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
All purchases of components up to now went smooth, but it is not straight forward to find a manufacturer for assembling the tiny trap body. Companies in other countries will be contacted as well.
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| Strategy for Future Research Activity |
Altering the presently complicated trap design and discuss with companies who have the technology to build the trap. A solution may be to use a ring-type multipole trap or slightly larger trap to demonstrate the advantage
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| Causes of Carryover |
Due to the missing trap, the remaining finances must be used for manufacturing the body of the new trap. So far no valid company has been found and the money could not be used prior to this fiscal year. During this fiscal year, the trap will be purchased as soon as possible.
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[Journal Article] New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes2018
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
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Journal Title
Phys. Rev. C
Volume: 97
Pages: 064306
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph2018
Author(s)
Y. Ito, P. Schury, M. Wada, F. Arai, H. Haba, Y. Hirayama, S. Ishizawa, D. Kaji, S. Kimura, H. Koura, M. MacComick, H. Miyatake, J.Y. Moon, K. Morimoto, K. Morita, M. Mukai, I. Murray, T. Niwase, K. Okada, A. Ozawa, M. Rosenbusch, A. Takamine, T. Tanaka, Y.X. Watanabe, H. Wollnik, S. Yamaki
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Journal Title
Phys. Rev. Lett.
Volume: 120
Pages: 102501
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph2018
Author(s)
S. Kimura, Y. Ito, D. Kaji, P. Schury, M. Wada, H. Haba, T. Hashimoto, Y. Hirayama, M. MacCormick, H. Miyatake, J. Y. Moon, K. Morimoto, M. Mukai, I. Murray, A. Ozawa, M. Rosenbusch, H. Schatz, A. Takamine, T. Tanaka, Y. X. Watanabe, H. Wollnik
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Journal Title
Int. J. Mass Spectrom.
Volume: 430
Pages: 134-142
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Precision mass measurements of 58-63Cr: study of nuclear collectivity towards the N=40 island of inversion2018
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
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Journal Title
Phys. Rev. Lett.
Volume: 120
Pages: 232501
DOI
Peer Reviewed / Int'l Joint Research
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