HIAT2015 - List of Authors (Zenihiro, J.)

Paper	Title	Page
MOPA24	Performance of a Resonant Schottky Pick-up in the Commissioning of Rare-RI Ring	98
	F. Suzaki, D. Nagae, S. Naimi, T. Uesaka, M. Wakasugi, T. Watanabe, K. Yamada, Y. Yano, J. Zenihiro RIKEN Nishina Center, Wako, Japan Y. Abe, Y. Yamaguchi RIKEN, Saitama, Japan Z. Ge IMP/CAS, Lanzhou, People's Republic of China K. Hiraishi, Y. Ichikawa, A. Ozawa, S. Suzuki, Y. Tajiri University of Tsukuba, Graduate School of Pure and Applied Sciences,, Tsukuba, Ibaraki, Japan I. Kato, H. Miura, T. Nishimura, S. Omika, T. Suzuki, N. Tadano, Y. Takeuchi, T. Yamaguchi Saitama University, Saitama, Japan T. Moriguchi UTTAC, Tsukuba, Ibaraki, Japan
	Rare-RI Ring , * is a storage ring dedicated for precise mass measurements of unstable nuclei to make clear the astrophysical r-process path. We employ the Isochronous mass spectrometry method in the order of 10^-6. For precise tuning of the isochronous field, we developed a resonant Schottky pick-up which had a resonant cavity. We acquired the quantities by the offline test: shunt impedance, and unloaded quality factor. Using the quantities, we estimated the output signal power which is corresponding to a single ion with charge q on resonance **. Comparing to thermal noise, present Schottky pick-up can detect a single ion with charge over 16. In June, we carried out the first commissioning of Rare-RI Ring using 78Kr³⁸⁺ beam with the energy of 167 MeV/nucleon. By using the individual injection method with the fast kicker system, we succeeded in injecting, storing, and extracting 78Kr³⁸⁺ ions. The Schottky pick-up successfully detected single 78Kr³⁸⁺ ions. Also we confirmed that 78Kr³⁸⁺ was stored for more than 2 seconds in a vacuum of 10-5 Pa. In this contribution, we will present recent status of the Schottky pick-up focusing on the results of the experiment. Y. Yamaguchi et al., Nucl. Instr. Meth. B 317 (2013) 629. A. Ozawa et al., Prog. Theor. Exp. Phys. 2012 (2012) 03C009. * F. Nolden et al., Nucl. Instr. Meth. A 659 (2011) 69.
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Paper

Title

Page

Performance of a Resonant Schottky Pick-up in the Commissioning of Rare-RI Ring

98

F. Suzaki, D. Nagae, S. Naimi, T. Uesaka, M. Wakasugi, T. Watanabe, K. Yamada, Y. Yano, J. Zenihiro
RIKEN Nishina Center, Wako, Japan
Y. Abe, Y. Yamaguchi
RIKEN, Saitama, Japan
Z. Ge
IMP/CAS, Lanzhou, People's Republic of China
K. Hiraishi, Y. Ichikawa, A. Ozawa, S. Suzuki, Y. Tajiri
University of Tsukuba, Graduate School of Pure and Applied Sciences,, Tsukuba, Ibaraki, Japan
I. Kato, H. Miura, T. Nishimura, S. Omika, T. Suzuki, N. Tadano, Y. Takeuchi, T. Yamaguchi
Saitama University, Saitama, Japan
T. Moriguchi
UTTAC, Tsukuba, Ibaraki, Japan

Rare-RI Ring *, ** is a storage ring dedicated for precise mass measurements of unstable nuclei to make clear the astrophysical r-process path. We employ the Isochronous mass spectrometry method in the order of 10^-6. For precise tuning of the isochronous field, we developed a resonant Schottky pick-up which had a resonant cavity. We acquired the quantities by the offline test: shunt impedance, and unloaded quality factor. Using the quantities, we estimated the output signal power which is corresponding to a single ion with charge q on resonance ***. Comparing to thermal noise, present Schottky pick-up can detect a single ion with charge over 16. In June, we carried out the first commissioning of Rare-RI Ring using 78Kr³⁸⁺ beam with the energy of 167 MeV/nucleon. By using the individual injection method with the fast kicker system, we succeeded in injecting, storing, and extracting 78Kr³⁸⁺ ions. The Schottky pick-up successfully detected single 78Kr³⁸⁺ ions. Also we confirmed that 78Kr³⁸⁺ was stored for more than 2 seconds in a vacuum of 10-5 Pa. In this contribution, we will present recent status of the Schottky pick-up focusing on the results of the experiment.
* Y. Yamaguchi et al., Nucl. Instr. Meth. B 317 (2013) 629.
** A. Ozawa et al., Prog. Theor. Exp. Phys. 2012 (2012) 03C009.
*** F. Nolden et al., Nucl. Instr. Meth. A 659 (2011) 69.

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