Cyclotrons2019 - List of Authors (Ohnishi, J.)

Paper	Title	Page
MOB01	Recent Progress in RIKEN RI Beam Factory	12
	O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, T. Nishi, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, A. Uchiyama, T. Watanabe, Y. Watanabe, K. Yamada RIKEN Nishina Center, Wako, Japan Y.M. Miyake RIKEN, Saitama, Japan
	Recent efforts at the RIKEN RI Beam Factory (RIBF) are aimed at increasing the beam intensity for very heavy ions such as xenon and uranium. This paper presents upgrade programs carried out over the past few years, including modifications of the RF cavities of the RIKEN Ring Cyclotron and improvements of the charge stripper. The current performance of the RIBF accelerators and future plans to further increase the beam intensity are also presented.
	Slides MOB01 [13.848 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOB01
About •	paper received ※ 13 September 2019 paper accepted ※ 24 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP024	Muon Cyclotron for Transmission Muon Microscope	208
	T. Yamazaki, Y. Nagatani KEK, Tokai Branch, Tokai, Naka, Ibaraki, Japan T. Adachi, Y. Miyake KEK, Tokai, Ibaraki, Japan A. Goto, J. Ohnishi RIKEN Nishina Center, Wako, Japan Y. Kumata, S. Kusuoka, T. Onda, H. Tsutsui SHI, Tokyo, Japan
	Funding: This work is supported by JSPS KAKENHI Grant Numbers JP17H06126 and JP19H05194. A transmission muon microscope is an unprecedented tool which enables its users to reconstruct 3D image of samples such as a living cell. Muons can gain penetrative power as their energy increase, though electrons above 1 MeV start to trigger electromagnetic showers and protons above 1 GeV cause nuclear reactions. Muons accelerated up to about 5 MeV are able to penetrate a living cell (~ 10 um), which is impossible with ultra-high voltage (1 MeV) electron microscopes. In order to accelerate muons, efficient acceleration is necessary because the lifetime of muons is only 2.2 us. In addition, it is important to accelerate muons without increasing their energy dispersion. A cyclotron with a flat-top acceleration system is the best suited for the transmission muon microscope and is being developed at the J-PARC muon facility (MUSE). In this poster, the transmission muon microscope project and the development of the muon cyclotron will be presented.
	Poster TUP024 [1.366 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP024
About •	paper received ※ 14 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Recent Progress in RIKEN RI Beam Factory

12

O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, T. Nishi, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, A. Uchiyama, T. Watanabe, Y. Watanabe, K. Yamada
RIKEN Nishina Center, Wako, Japan
Y.M. Miyake
RIKEN, Saitama, Japan

Recent efforts at the RIKEN RI Beam Factory (RIBF) are aimed at increasing the beam intensity for very heavy ions such as xenon and uranium. This paper presents upgrade programs carried out over the past few years, including modifications of the RF cavities of the RIKEN Ring Cyclotron and improvements of the charge stripper. The current performance of the RIBF accelerators and future plans to further increase the beam intensity are also presented.

Slides MOB01 [13.848 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOB01

About •

paper received ※ 13 September 2019 paper accepted ※ 24 September 2019 issue date ※ 20 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP024

Muon Cyclotron for Transmission Muon Microscope

208

T. Yamazaki, Y. Nagatani
KEK, Tokai Branch, Tokai, Naka, Ibaraki, Japan
T. Adachi, Y. Miyake
KEK, Tokai, Ibaraki, Japan
A. Goto, J. Ohnishi
RIKEN Nishina Center, Wako, Japan
Y. Kumata, S. Kusuoka, T. Onda, H. Tsutsui
SHI, Tokyo, Japan

Funding: This work is supported by JSPS KAKENHI Grant Numbers JP17H06126 and JP19H05194.
A transmission muon microscope is an unprecedented tool which enables its users to reconstruct 3D image of samples such as a living cell. Muons can gain penetrative power as their energy increase, though electrons above 1 MeV start to trigger electromagnetic showers and protons above 1 GeV cause nuclear reactions. Muons accelerated up to about 5 MeV are able to penetrate a living cell (~ 10 um), which is impossible with ultra-high voltage (1 MeV) electron microscopes. In order to accelerate muons, efficient acceleration is necessary because the lifetime of muons is only 2.2 us. In addition, it is important to accelerate muons without increasing their energy dispersion. A cyclotron with a flat-top acceleration system is the best suited for the transmission muon microscope and is being developed at the J-PARC muon facility (MUSE). In this poster, the transmission muon microscope project and the development of the muon cyclotron will be presented.

Poster TUP024 [1.366 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP024

About •

paper received ※ 14 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)