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Dive into the research topics where Yuichi Ichikawa is active.

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Featured researches published by Yuichi Ichikawa.


Physics of Particles and Nuclei | 2014

Search for electric dipole moment in 129Xe atom using a nuclear spin oscillator

K. Asahi; Yuichi Ichikawa; Masatoshi Chikamori; Yuichi Ohtomo; Eri Hikota; T. Suzuki; T. Inoue; T. Furukawa; A. Yoshimi; K. Suzuki; T. Nanao; H. Miyatake; Masato Tsuchiya; N. Yoshida; Hazuki Shirai; Takashi Ino; H. Ueno; Yukari Matsuo; Takeshi Fukuyama

We aim to measure the electric dipole moment (EDM) of a diamagnetic atom 129Xe using an optical-detection nuclear spin maser technique. The relation of EDM in a diamagnetic atom to nuclear Schiff moment and fundamental sources generating it is discussed, and the present status for the development of our experimental setup is presented.


Physics Letters A | 2018

Development of co-located 129 Xe and 131 Xe nuclear spin masers with external feedback scheme

Tomohiko Sato; Yuichi Ichikawa; Shuichiro Kojima; Chikako Funayama; Shunya Tanaka; Tatsuo Inoue; A.Uchiyama; A.Gladkov; A.Takamine; Yu Sakamoto; Yuichi Ohtomo; Chika Hirao; Masatoshi Chikamori; Eri Hikota; T. Suzuki; Masato Tsuchiya; T. Furukawa; A. Yoshimi; C. Bidinosti; T.Ino; H.Ueno; Yukari Matsuo; Takeshi Fukuyama; N.Yoshinaga; Y.Sakemi; K. Asahi

We report on the operation of co-located Xe and Xe nuclear spin masers with an external feedback scheme, and discuss the use of Xe as a comagnetometer in measurements of the Xe spin precession frequency. By applying a correction based on the observed change in the Xe frequency, the frequency instability due to magnetic field and cell temperature drifts are eliminated by two orders of magnitude. The frequency precision of 6.2 μHz is obtained for a 10 s averaging time, suggesting the possibility of future improvement to ≈ 1 nHz by improving the signal-to-noise ratio of the observation.


Proceedings of The 26th International Nuclear Physics Conference — PoS(INPC2016) | 2017

Development Of 131Xe Co-magnetometry For Xe Atomic EDM Search

Tomoya Sato; Yuichi Ichikawa; Shuichiro Kojima; Chikako Funayama; Shunya Tanaka; Yu Sakamoto; Yuichi Ohtomo; Chika Hirao; Masatoshi Chikamori; Eri Hikota; T. Furukawa; A. Yoshimi; Christopher P. Bidinosti; Takashi Ino; H. Ueno; Yukari Matsuo; Takeshi Fukuyama; K. Asahi

Co-magnetometry enables the elimination of systematic errors arising from the long-term drift in the magnetic field, and is essential for a precision measurement of spin precession frequency in experiments searching for electric dipole moment (EDM).


Proceedings of the 2nd International Symposium on Science at J-PARC — Unlocking the Mysteries of Life, Matter and the Universe — | 2015

Isotope Identification in Nuclear Emulsion Plate

Shinji Kinbara; Akihiro Mishina; Yuichi Ichikawa; Yoko Endo; Hiroki Itoh; Aye Moh Moh Theint; Hidetaka Kobayashi; Myint Kyaw Soe; Khin Than Tint; Kazuma Nakazawa; Hideki Ueno; Junya Yoshida

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Nuclear Physics News | 2015

Spin-Aligned Radioactive Isotope Beams via Two-Step Fragmentation Reaction

H. Ueno; Yuichi Ichikawa

Xe nuclear spin maser shows great promise as a co-magnetometer in a Xe EDM experiment, because the systematic error originating from the Xe-Rb interaction, which virtually limits the sensitivity in a case of a


Nature Physics | 2012

Production of spin-controlled rare isotope beams

Yuichi Ichikawa; H. Ueno; Y. Ishii; T. Furukawa; A. Yoshimi; Daisuke Kameda; Hiroshi Watanabe; N. Aoi; K. Asahi; Dimiter L. Balabanski; R. Chevrier; Jean Michel Daugas; N. Fukuda; G. Georgiev; Hironori Hayashi; H. Iijima; N. Inabe; Takeshi Inoue; M. Ishihara; Toshiyuki Kubo; T. Nanao; T. Ohnishi; K. Suzuki; Masato Tsuchiya; Hiroyuki Takeda; M. M. Rajabali

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Physics Letters A | 2012

Low-frequency 129Xe nuclear spin oscillator with optical spin detection

A. Yoshimi; T. Inoue; T. Furukawa; T. Nanao; K. Suzuki; Masatoshi Chikamori; Masato Tsuchiya; Hironori Hayashi; M. Uchida; N. Hatakeyama; Sota Kagami; Yuichi Ichikawa; H. Miyatake; K. Asahi

He co-magnetometer, will be cancelled out. The performance of a cell which contains both


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2013

Novel nuclear laser spectroscopy method using superfluid helium for measurement of spins and moments of exotic nuclei

T. Furukawa; T. Wakui; Xiaofei Yang; Tomomi Fujita; Kei Imamura; Yasuhiro Yamaguchi; Hiroki Tetsuka; Yoshiki Tsutsui; Yosuke Mitsuya; Yuichi Ichikawa; Y. Ishibashi; N. Yoshida; Hazuki Shirai; Yuta Ebara; Miki Hayasaka; Shino Arai; Sosuke Muramoto; A. Hatakeyama; M. Wada; Tetsu Sonoda; Y. Ito; Tohru Kobayashi; S. Nishimura; Mitsuki Nishimura; Y. Kondo; K. Yoneda; Shigeru Kubono; Yoshimitsu Ohshiro; H. Ueno; T. Shinozuka

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Hyperfine Interactions | 2015

Development of high-homogeneity magnetic field coil for 129Xe EDM experiment

Yu Sakamoto; C. Bidinosti; Yuichi Ichikawa; Tomohiko Sato; Yuichi Ohtomo; Shuichiro Kojima; Chikako Funayama; T. Suzuki; Masato Tsuchiya; T. Furukawa; A. Yoshimi; Takashi Ino; H. Ueno; Yukari Matsuo; Takeshi Fukuyama; K. Asahi

Xe and


2013 International Nuclear Physics Conference, INPC 2013 | 2014

Active nuclear spin maser oscillation with double cell

Eri Hikota; Masatoshi Chikamori; Yuichi Ichikawa; Yuichi Ohtomo; Yu Sakamoto; T. Suzuki; C. Bidinosti; Tatsuo Inoue; T. Furukawa; A. Yoshimi; K. Suzuki; T. Nanao; H. Miyatake; Masato Tsuchiya; N. Yoshida; Hazuki Shirai; Takashi Ino; H. Ueno; Yukari Matsuo; Takeshi Fukuyama; K. Asahi

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K. Asahi

Tokyo Institute of Technology

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T. Furukawa

Tokyo Metropolitan University

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H. Ueno

Tokyo Institute of Technology

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Yuichi Ohtomo

Tokyo Institute of Technology

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Masato Tsuchiya

Tokyo Institute of Technology

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Masatoshi Chikamori

Tokyo Institute of Technology

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Eri Hikota

Tokyo Institute of Technology

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