PAC2013 - List of Authors (Tongu, H.)

Paper	Title	Page
WEPBA02	Possible Observation of Transverse Laser Cooled Ultimate Cold Ion Beam in S-LSR*	886
	K. Jimbo Kyoto University, Kyoto, Japan M. Nakao, A. Noda, T. Shirai NIRS, Chiba-shi, Japan H. Souda Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan H. Tongu Kyoto ICR, Uji, Kyoto, Japan Y. Yuri JAEA/TARRI, Gunma-ken, Japan
	Transverse laser cooling is pursued at an ion storage/cooler ring, S-LSR, Kyoto University. An RF bunched Mg+ beam was cooled transversely through synchro-betatron resonance coupling by a co-propagating laser. We investigated peaks of the synchrotron oscillation spectroscopically so that we can observe it stably. Oscillation signals from a parallel-plate pickup were observed by a spectrum analyzer. We also observed the coherent synchrotron modes. As the beam temperature decreases, the ion beam would be in space charge limited region. According to the computer simulation, in the case the beam turns to be space charge limited, the disappearance of peaks of the synchrotron oscillation is expected. We would like to propose a capability of detecting space charge limited region by observation of such a frozen synchrotron oscillation.

Paper

Title

Page

Possible Observation of Transverse Laser Cooled Ultimate Cold Ion Beam in S-LSR*

886

K. Jimbo
Kyoto University, Kyoto, Japan
M. Nakao, A. Noda, T. Shirai
NIRS, Chiba-shi, Japan
H. Souda
Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan
H. Tongu
Kyoto ICR, Uji, Kyoto, Japan
Y. Yuri
JAEA/TARRI, Gunma-ken, Japan

Transverse laser cooling is pursued at an ion storage/cooler ring, S-LSR, Kyoto University. An RF bunched Mg+ beam was cooled transversely through synchro-betatron resonance coupling by a co-propagating laser. We investigated peaks of the synchrotron oscillation spectroscopically so that we can observe it stably. Oscillation signals from a parallel-plate pickup were observed by a spectrum analyzer. We also observed the coherent synchrotron modes. As the beam temperature decreases, the ion beam would be in space charge limited region. According to the computer simulation, in the case the beam turns to be space charge limited, the disappearance of peaks of the synchrotron oscillation is expected. We would like to propose a capability of detecting space charge limited region by observation of such a frozen synchrotron oscillation.