HIAT2015 - List of Authors (Kurita, K.)

Paper	Title	Page
WEPB25	Development of a Buffer Gas-Free Buncher for Low Energy RI Ion Beam	253
	M. Togasaki, K. Kurita, K. Yamada Rikkyo University, Tokyo, Japan M. Hara, T. Ohnishi, M. Wakasugi RIKEN Nishina Center, Wako, Japan R. Toba Nagaoka University of Technology, Nagaoka, Niigata, Japan
	In the SCRIT (Self-Confining RI Ion Target) electron scattering facility* at RIKEN RI Beam Factory, we constructed an ISOL-type RI beam generator named ERIS (Electron-beam-driven RI separator for SCRIT)*. ERIS supplys continuous RI ion beam with the energy of 50 keV at maximum. In order to efficiently inject the RI beam into the SCRIT device equipped in an electron storage ring, it is necessary to provide a 500-us pulsed ion beam without deteriorating of a vacuum level of less than 10^-7 Pa. Therefore, we are developing a buffer gas-free buncher system working under the ultra-high vacuum based on a linear radiofrequency quadrupole (RFQ) trap. Our idea is to make active use of the fringing field at the entrance and the exit to decelerate and stack ions continuously injected into the buncher. Experiment for the performance study is now going on using the stable 133Cs and 23Na ions. In this paper, we will report the latest status of the development and the study of the buncher. M. Wakasugi et. al, Nucl. Instr. Meth. B317, 668 (2013) **T. Ohnishi et. al, Nucl. Instr. Meth. B317, 357 (2013)
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Paper

Title

Page

Development of a Buffer Gas-Free Buncher for Low Energy RI Ion Beam

253

M. Togasaki, K. Kurita, K. Yamada
Rikkyo University, Tokyo, Japan
M. Hara, T. Ohnishi, M. Wakasugi
RIKEN Nishina Center, Wako, Japan
R. Toba
Nagaoka University of Technology, Nagaoka, Niigata, Japan

In the SCRIT (Self-Confining RI Ion Target) electron scattering facility* at RIKEN RI Beam Factory, we constructed an ISOL-type RI beam generator named ERIS (Electron-beam-driven RI separator for SCRIT)**. ERIS supplys continuous RI ion beam with the energy of 50 keV at maximum. In order to efficiently inject the RI beam into the SCRIT device equipped in an electron storage ring, it is necessary to provide a 500-us pulsed ion beam without deteriorating of a vacuum level of less than 10^-7 Pa. Therefore, we are developing a buffer gas-free buncher system working under the ultra-high vacuum based on a linear radiofrequency quadrupole (RFQ) trap. Our idea is to make active use of the fringing field at the entrance and the exit to decelerate and stack ions continuously injected into the buncher. Experiment for the performance study is now going on using the stable 133Cs and 23Na ions. In this paper, we will report the latest status of the development and the study of the buncher.
*M. Wakasugi et. al, Nucl. Instr. Meth. B317, 668 (2013)
**T. Ohnishi et. al, Nucl. Instr. Meth. B317, 357 (2013)

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