2013 Fiscal Year Final Research Report
Time reversal symmetry violation test with new generation ultra cold neutrons
| Project/Area Number |
21224007
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
MASUDA Yasuhiro 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 特別准教授 (60150009)
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| Co-Investigator(Kenkyū-buntansha) |
JEONG Sun Chang 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (00262105)
HATANAKA Kichiji 大阪大学, 核物理研究センター, 教授 (50144530)
MATSUTA Kensaku 大阪大学, 理学研究科, 准教授 (50181722)
WATANABE Yutaka 高エネルギー加速器研究機構, 素粒子原子核研究所, 講師 (50353363)
MIHARA Mototugu 大阪大学, 理学研究科, 助教 (60294154)
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| Project Period (FY) |
2009-05-11 – 2014-03-31
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| Keywords | 超冷中性子 / 時間反転対称性 |
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| Research Abstract |
A new generation UCN source of He-II and an apparatus for neutron EDM measurement have been constructed. UCN have been produced by means of an RCNP proton beam. UCN were successfully extracted through an aluminum window at the He-II bottle, where a 3.5 T magnetic field was applied. UCN were polarized upon the extraction. This UCN source reduces the statistical error lower than 10-26 e cm, when RCNP proton beam power is increased by a factor 10. The geometric phase effect has been studied so that the systematic error becomes lower than 10-27 e cm.
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Research Products
(11 results)
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[Journal Article] Nuclear moments as a probe of electronic structure in material, exotic nuclear structure and fundamental symmetry2013
Author(s)
K. Matsuta, T. Minamisono, M. Mihara, M. Fukuda, Shengyun Zhu, Y. Masuda, K.Hatanaka, Daqing Yuan, Yongnan Zheng, Yi Zuo, Ping Fang, Dongmei Zhou, T. Ohtsubo, T. Izumikawa, S. Momota, D. Nishimura, R. Matsumiya, A. Kitagawa, S. Sato, M. Kanazawa, M. Torikoshi, T. Nagatomo, Y. Nojiri, T. Suzuki, Xizhen Zhang, J. R. Alonso, T. J. M. Symons, S. Kawasaki, S. C. Jeong, Y. Watanabe, K. Minamisono, other members of Osaka-CIAE-NIRS-Niigata-Kochi-LBL collaboration
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Journal Title
Hyperfine Interactions
Volume: 220
Pages: 21-28
Peer Reviewed
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[Journal Article] Creation of polarized ultracold neutrons and observation of Ramsey resonance for electric dipole moment measurement2013
Author(s)
K. Matsuta, Y. Masuda, K. Hatanaka, S. C. Jeong, S. Kawasaki, R. Matsumiya, M. Mihara, Y. Watanabe, D. Nishimura, Y. Morita, K. Asahi, T. Adachi, J. Martin,A. Konaka, A. Miller, C. Bidinosti, T. Dawson, L. Lee, C. Davis, D. Ramsay, W. van Oers, E. Korkmaz, L. Buchman
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Journal Title
Hyperfine Interactions
Volume: 220
Pages: 89-93
Peer Reviewed
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[Journal Article] An EDM Measurement with a New Comagnetometer and a High Density UCN Source2013
Author(s)
K. Matsuta, Y. Masuda, K. Hatanaka, S. Kawasaki, R. Matsumiya, M. Mihara, S.C. Jeong, Y. Watanabe, T. Adachi, D. Nishimura, K. Asahi, J.W. Martin, A. Konaka, A. Miller, C. Bidinosti, T. Dawson, L. Lee, C.A. Davis, W.D. Ramsay, W.T.H. van Oers, E. Korkmaz and L. Buchman
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Journal Title
AIP Conf. Proc
Volume: 1560
Pages: 152
Peer Reviewed
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