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Publication
Featured researches published by Masanori Wakasugi.
Physical Review Letters | 2017
K. Tsukada; A. Enokizono; T. Ohnishi; K. Adachi; T. Fujita; M. Hara; M. Hori; T. Hori; S. Ichikawa; K. Kurita; K. Matsuda; T. Suda; T. Tamae; M. Togasaki; Masanori Wakasugi; M. Watanabe; K. Yamada
The first elastic electron scattering has been successfully performed at the self-confining radioactive-isotope ion target (SCRIT) facility, the worlds first electron scattering facility for SCRIT technique achieved high luminosity (over 10^{27} cm^{-2} s^{-1}, sufficient for determining the nuclear shape) with only 10^{8} target ions. While ^{132}Xe used in this time as a target is a stable isotope, the charge density distribution was first extracted from the momentum transfer distributions of the scattered electrons by comparing the results with those calculated by a phase shift calculation.
International Journal of Modern Physics E-nuclear Physics | 2009
I. Arai; A. Ozawa; Y. Yasuda; T. Fujinawa; N. Fukunishi; T. Ohnishi; A. Goto; K. Y. Hara; H. Sakurai; Masanori Wakasugi; Y. Yamaguchi; Yuuri Yano; Tsuneo Suzuki; T. Yamaguchi; Takashi Kikuchi; T. Ohtsubo
The cyclotron-like storage ring dedicated to Rare-RI Ring project consists of 6 magnetic sectors and 6 straight sections, having a circumference of 56.13 m. The magnetic sector works for both bending and focusing. The total circulation is assumed to be 1,000 turns. Over the momentum range from -1% to +1% in ∆p/p, the required isochronisity is 10-6 while the beam emittance is sevaral tens of π mm-mrad. To examine the design of cyclotron-like storage ring and fix its parameters, we have developed a high precision beam optics simulation. To achieve the precision as high as possible within a feasible computational time, we have adopted a geometrical tracking assuming a circular orbit for a small spatial segment. For that purpose, it is enough that the magnetic sector is divided into 150 sub-sectors in calculation. In each sub-sector, the magnetic field is given as a function of radial position but uniform around the vicinity of beam trajectory. The beam trajectory is evaluated in 4th order Runge-Kutta algorithm. Finally, we have achieved a precision of 10-9 in ∆T/T and a computational time of 1.8 sec on a typical PC server for ray tracing of single particle undergoing a circulation of 1,000 turns.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1998
Masanori Wakasugi; T. Ariga; K. Ikegami; N. Inabe; Masayuki Kase; T. Katayama; T. Kubo; Hiroki Okuno; S. Ozawa; I. Tanihata; Y. Watanabe; Atsumasa Yoshida; Yasushige Yano
Abstract An ultralow-background fluorescence-photon detection system has been successfully developed for the collinear laser spectroscopy of highly charged ion beams having a relativistic velocity. We applied the technology of a cryopump to a photon-detection system. A charcoal panel, optical filters and four movable collimators strongly reduced the background due to scattered photons of the incident laser beam. The background due to collisions between the ion beam and residual gas was also suppressed by improving the vacuum using a cryopump technique. With this system, we clearly observed the laser-induced fluorescence spectra of the 2S 1/2 -2P 1/2,3/2 transitions in an Li-like 11 B 2+ ion beam with a signal-to-noise ratio of 200. The ion-beam energy was 11.25A MeV and the intensity was 10 4 ions/bunch. We also demonstrated that the system has the capability of measuring the lifetimes of excited states.
Proceedings of The 26th International Nuclear Physics Conference — PoS(INPC2016) | 2017
Kyo Tsukada; Keita Kasama; Kazuki Namba; T. Suda; T. Tamae; Masahiro Hara; Shinnichi Ichikawa; T. Ohnishi; Masanori Wakasugi; Masamitsu Watanabe; Kousuke Adachi; Akitomo Enokizono; Toshihiro Fujita; Mitsuki Hori; K. Kurita; Shinnosuke Sasamura; Mamoru Togasaki; Nobuaki Uchida; Kouhei Yamada
We have constructed the SCRIT electron scattering facility at RIKEN in order to realize electron scattering off unstable nuclei. Because electron scattering is the most powerful and reliable tool to study the internal structure of the atomic nuclei as demonstrated for many stable nuclei in the latter half of the 20th century, actualization of electron scattering for the unstable nuclei has been long awaited. Recently, we have performed a series of elastic electron scattering experiments with
Proceedings of The 26th International Nuclear Physics Conference — PoS(INPC2016) | 2017
Akitomo Enokizono; Kousuke Adachi; Takahiro Fujita; Masahiro Hara; Mitsuki Hori; Toshitada Hori; Sin'ichi Ichikawa; Keita Kasama; K. Kurita; Kazuki Namba; Tatsuya Ohnishi; Shinnosuke Sasamura; T. Suda; T. Tamae; Kyo Tsukada; Mamoru Togasaki; Nobuaki Uchida; Masanori Wakasugi; Shou Wang; Masamitsu Watanabe; Kouhei Yamada
^{132}
Int. Workshop on Beam Cooling and Related Topics (COOL'15), Newport News, VA, USA, September 28 - October 2, 2015 | 2016
Y. Yamaguchi; Yasushi Abe; F. Suzaki; Masanori Wakasugi
Xe target. The high luminosity of around 10
13th Heavy Ion Accelerator Technology Conference (HIAT2015), Yokohama, Japan, 7-11 September 2015 | 2016
F. Suzaki; Yasushi Abe; Zhuang Ge; Kentaro Hiraishi; Yukina Ichikawa; Ikuma Kato; Hiroshi Miura; T. Moriguchi; D. Nagae; Sarah Naimi; Takuma Nishimura; Shun'ichiro Omika; A. Ozawa; S. Suzuki; Takeshi Suzuki; Natsuki Tadano; Yoshiyuki Tajiri; Yuuki Takeuchi; T. Uesaka; Masanori Wakasugi; T. Watanabe; Kazunari Yamada; Takayuki Yamaguchi; Y. Yamaguchi; Yasushige Yano; J. Zenihiro
^{27}
Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014) | 2015
T. Suda; Akitomo Enozokizono; Masahiro Hara; Yuji Haraguchi; Sin’ichi Ichikawa; K. Kurita; Saki Matsuo; T. Ohnishi; T. Tamae; Mamoru Togasaki; Kyo Tsukada; Teruaki Tsuru; Shuo Wang; Shunpei Yoneyama; Masanori Wakasugi
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Proceedings of 8th International Conference on Nuclear Physics at Storage Rings — PoS(STORI11) | 2012
Y. Yamaguchi; Masanori Wakasugi; Hiroshi Suzuki; Tadashi Fujinawa; T. Uesaka; Yasushige Yano; A. Ozawa; D. Nagae; Takayuki Yamaguchi; Takeshi Suzuki; Takeshi Kikuchi; Weihua Jiang; Toru Sasaki; Akira Tokuchi
^{-2}
BEAM INSTRUMENTATION WORKSHOP 2006: Twelfth Beam Instrumentation Workshop | 2006
K. Kurita; Tetsuya Masuda; Tadashi Koseki; Akira Noda; Toshiyuki Shirai; H. Tongu; Yukihiro Furukawa; T. Tamae; Sachiko Ito; T. Ohnishi; T. Suda; Hiroyuki Takeda; Shuo Wang; Takashi Emoto; Masato Nakamura; Masanori Wakasugi; Yasushige Yano
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