RUPAC2012 - List of Authors (Tongu, H.)

Paper

Title

Page

Approach to the Low Temperature State Oriented for Crystalline Beam

48

A. Noda, M. Nakao, H. Souda, H. Tongu
Kyoto ICR, Uji, Kyoto, Japan
M. Grieser
MPI-K, Heidelberg, Germany
Z.Q. He
TUB, Beijing, People's Republic of China
K. Jimbo
Kyoto University, Institute for Advanced Energy, Kyoto, Japan
I.N. Meshkov, A.V. Smirnov
JINR, Dubna, Moscow Region, Russia
K. Noda, T. Shirai
NIRS, Chiba-shi, Japan
H. Okamoto, K. Osaki
HU/AdSM, Higashi-Hiroshima, Japan
Y. Yuri
JAEA/TARRI, Gunma-ken, Japan

Funding: Work supported by Advanced Compact Accelerator Development of MEXT. It is also supported by GCOE project at Kyoto University, "The next generation of Physics-Spun from Universality and Emergence".
With the use of S-LSR, an ion storage and cooler ring at ICR, Kyoto University, approach to attain the low temperature beam has been continued in these several years. Based on the realization of one dimensional ordered state of 7 MeV proton beam by an electron cooling*, effort to reach lower temperature by laser cooling with much stronger cooling force, has been continued for 40 keV Mg ion beam. With the use of synchro-betatron resonance coupling(SBRC), longitudinal cooling effect can be well expected to be transferred to the transverse directions** and we have experimentally demonstrated of such effect***. The transverse cooling efficiency is, however, not so good deteriorated by intra-beam scattering (IBS) effect for the beam intensities higher than 10⁷. Although the reduction of the beam intensity keeping enough S/N ratio for observation of the beam, is not so easy, we are now challenging "controlled scraping", which controls the horizontal scraper position according to the extent of the indirect horizontal laser cooling by SBRC. In the present paper, our research stream from electron cooling to multi-dimensional laser cooling is surveyed at first and then challenge toward the crystalline beam is to be presented.
*: T. Shirai et al., Phys. Rev. Lett., Vol.98 (2007)204801.
**:H. Okamoto, A.M. Sessler and D. Möhl, Phys. Rev. Lett. Vol.72 (1994) 3977.
***: M. Nakao et al., to be submitted to Phys. Rev. ST-AB.

Slides TUXCH03 [8.557 MB]

Paper	Title	Page
TUXCH03	Approach to the Low Temperature State Oriented for Crystalline Beam	48
	A. Noda, M. Nakao, H. Souda, H. Tongu Kyoto ICR, Uji, Kyoto, Japan M. Grieser MPI-K, Heidelberg, Germany Z.Q. He TUB, Beijing, People's Republic of China K. Jimbo Kyoto University, Institute for Advanced Energy, Kyoto, Japan I.N. Meshkov, A.V. Smirnov JINR, Dubna, Moscow Region, Russia K. Noda, T. Shirai NIRS, Chiba-shi, Japan H. Okamoto, K. Osaki HU/AdSM, Higashi-Hiroshima, Japan Y. Yuri JAEA/TARRI, Gunma-ken, Japan
	Funding: Work supported by Advanced Compact Accelerator Development of MEXT. It is also supported by GCOE project at Kyoto University, "The next generation of Physics-Spun from Universality and Emergence". With the use of S-LSR, an ion storage and cooler ring at ICR, Kyoto University, approach to attain the low temperature beam has been continued in these several years. Based on the realization of one dimensional ordered state of 7 MeV proton beam by an electron cooling, effort to reach lower temperature by laser cooling with much stronger cooling force, has been continued for 40 keV Mg ion beam. With the use of synchro-betatron resonance coupling(SBRC), longitudinal cooling effect can be well expected to be transferred to the transverse directions* and we have experimentally demonstrated of such effect**. The transverse cooling efficiency is, however, not so good deteriorated by intra-beam scattering (IBS) effect for the beam intensities higher than 10⁷. Although the reduction of the beam intensity keeping enough S/N ratio for observation of the beam, is not so easy, we are now challenging "controlled scraping", which controls the horizontal scraper position according to the extent of the indirect horizontal laser cooling by SBRC. In the present paper, our research stream from electron cooling to multi-dimensional laser cooling is surveyed at first and then challenge toward the crystalline beam is to be presented. : T. Shirai et al., Phys. Rev. Lett., Vol.98 (2007)204801. :H. Okamoto, A.M. Sessler and D. Möhl, Phys. Rev. Lett. Vol.72 (1994) 3977. *: M. Nakao et al., to be submitted to Phys. Rev. ST-AB.
	Slides TUXCH03 [8.557 MB]