PAC09 - List of Authors (Tanabe, M.)

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Tanabe, M.

Paper	Title	Page
TH5PFP029	Optical Measurement System of Laser-Cooled Mg Ion Beam	3257
	M. Nakao, T. Ishikawa, A. Noda, H. Souda, M. Tanabe, H. Tongu Kyoto ICR, Uji, Kyoto M. Grieser MPI-K, Heidelberg K. Jimbo Kyoto IAE, Kyoto H. Okamoto HU/AdSM, Higashi-Hiroshima S. Shibuya AEC, Chiba T. Shirai NIRS, Chiba-shi A.V. Smirnov JINR, Dubna, Moscow Region
	Funding: This work is supported by Advanced Accelerator Development Project of MEXT and the Global COE program "The Next Generation of Physics, Spun from Universality and Emergence". Transverse laser cooling experiments of 24Mg+ beam have been carried out at S-LSR, which is a small ion storage and cooler ring. According to a simulation, it is expected that under such a condition as the difference of synchrotron and betatron tunes is near integer, synchro-betatron coupling occurs and transverse laser cooling will be achieved. In order to confirm this situation, the horizontal beam size and momentum spread are measured optically with CCD camera and PAT (post acceleration tube), respectively,*. CCD camera observes fluorescence from the beam at the laser cooling section. Typical measured horizontal beam size is 0.5mm (1 σ). In some condition, an increase of fluorescence strength is observed, which indicates the beam concentration to the center, where the beam and the laser can interact. PAT is utilized for measurement of a longitudinal beam velocity profile. By application of electric potential to the PAT, the beam velocity is slightly modified. Since only particles which have velocities in a certain region can interact with the laser, the time variation of the florescence during voltage sweep represents the longitudinal velocity profile of the beam. H. Okamoto, Phys. Rev. E 50, 4982 (1994) B. Wanner et al., Phys. Rev. A 58, 2242 (1998) *T. Ishikawa, Master's thesis, Kyoto University (2008)

Paper

Title

Page

TH5PFP029

Optical Measurement System of Laser-Cooled Mg Ion Beam

3257

M. Nakao, T. Ishikawa, A. Noda, H. Souda, M. Tanabe, H. Tongu
Kyoto ICR, Uji, Kyoto
M. Grieser
MPI-K, Heidelberg
K. Jimbo
Kyoto IAE, Kyoto
H. Okamoto
HU/AdSM, Higashi-Hiroshima
S. Shibuya
AEC, Chiba
T. Shirai
NIRS, Chiba-shi
A.V. Smirnov
JINR, Dubna, Moscow Region

Funding: This work is supported by Advanced Accelerator Development Project of MEXT and the Global COE program "The Next Generation of Physics, Spun from Universality and Emergence".

Transverse laser cooling experiments of 24Mg+ beam have been carried out at S-LSR, which is a small ion storage and cooler ring. According to a simulation, it is expected that under such a condition as the difference of synchrotron and betatron tunes is near integer, synchro-betatron coupling occurs and transverse laser cooling will be achieved*. In order to confirm this situation, the horizontal beam size and momentum spread are measured optically with CCD camera and PAT (post acceleration tube), respectively**,***. CCD camera observes fluorescence from the beam at the laser cooling section. Typical measured horizontal beam size is 0.5mm (1 σ). In some condition, an increase of fluorescence strength is observed, which indicates the beam concentration to the center, where the beam and the laser can interact. PAT is utilized for measurement of a longitudinal beam velocity profile. By application of electric potential to the PAT, the beam velocity is slightly modified. Since only particles which have velocities in a certain region can interact with the laser, the time variation of the florescence during voltage sweep represents the longitudinal velocity profile of the beam.

*H. Okamoto, Phys. Rev. E 50, 4982 (1994)
**B. Wanner et al., Phys. Rev. A 58, 2242 (1998)
***T. Ishikawa, Master's thesis, Kyoto University (2008)