IPAC2011 - Classification: 01 Circular Colliders / A21 Accelerators and Storage Rings, Other

Paper	Title	Page
THPZ007	Lattice Design of Low Emittance and Low Beta Function at Collision Point for SuperKEKB	3693
	Y. Ohnishi, H. Koiso, A. Morita, K. Oide, H. Sugimoto KEK, Ibaraki, Japan
	Extremely low beta function at the interaction point(IP) and low emittance are necessary to achieve the design luminosity of 8x10³5 cm^-2 s^-1 for a SuperKEKB project. The low emittance with a large Piwinski angle makes this possible with longer bunch longitudinally compared with the vertical beta function at IP. We call this Nano-beam scheme. In this scheme, a beam-beam parameter is realized to be less than 0.09 for the design luminosity. The lattice features, chromaticity corrections, and dynamic aperture are discussed in this article.

THPZ021	Effect of Coherent Synchrotron Radiation at the SuperKEKB Damping Ring	3732
	H. Ikeda, T. Abe, M. Kikuchi, K. Oide, K. Shibata, M. Tobiyama, D.M. Zhou KEK, Ibaraki, Japan
	The longitudinal wake field dominated by the CSR is important at the SuperKEKB damping ring. The peak of the CSR wake field is 100 times higher than those of the vacuum chamber components. We calculated the CSR effect for different vacuum chamber cross-sections, and adopted one which reduced longitudinal instability.

THPZ022	Operation Scheme and Statistics of KEKB	3735
	M. Tanaka MELCO SC, Tsukuba, Japan Y. Funakoshi KEK, Ibaraki, Japan
	The KEKB B-Factory(KEKB) started a collision experiment in 1999 and finished in June, 2010. The total operation time of KEKB from fiscal year 2000 was 55657 hours. The breakdowns of operation are physics run 73.8%, machine study 6.8%, machine tuning 4.8%, beam tuning 5.9%, trouble 5.3%, maintenance 2.1% and other 1.3%. The total integrated luminosity was 10⁴¹ fb-1 and the maximum peak luminosity was 21.083 nb-1s⁻¹. To increase the peak and integrated luminosity, the continuous injection scheme, the crab cavities and the skew sextupole magnets were effective. We finished over ten year operation of KEKB in June, 2010.

Paper

Title

Page

Lattice Design of Low Emittance and Low Beta Function at Collision Point for SuperKEKB

3693

Y. Ohnishi, H. Koiso, A. Morita, K. Oide, H. Sugimoto
KEK, Ibaraki, Japan

Extremely low beta function at the interaction point(IP) and low emittance are necessary to achieve the design luminosity of 8x10³5 cm^-2 s^-1 for a SuperKEKB project. The low emittance with a large Piwinski angle makes this possible with longer bunch longitudinally compared with the vertical beta function at IP. We call this Nano-beam scheme. In this scheme, a beam-beam parameter is realized to be less than 0.09 for the design luminosity. The lattice features, chromaticity corrections, and dynamic aperture are discussed in this article.

THPZ021

Effect of Coherent Synchrotron Radiation at the SuperKEKB Damping Ring

3732

H. Ikeda, T. Abe, M. Kikuchi, K. Oide, K. Shibata, M. Tobiyama, D.M. Zhou
KEK, Ibaraki, Japan

The longitudinal wake field dominated by the CSR is important at the SuperKEKB damping ring. The peak of the CSR wake field is 100 times higher than those of the vacuum chamber components. We calculated the CSR effect for different vacuum chamber cross-sections, and adopted one which reduced longitudinal instability.

THPZ022

Operation Scheme and Statistics of KEKB

3735

M. Tanaka
MELCO SC, Tsukuba, Japan
Y. Funakoshi
KEK, Ibaraki, Japan

The KEKB B-Factory(KEKB) started a collision experiment in 1999 and finished in June, 2010. The total operation time of KEKB from fiscal year 2000 was 55657 hours. The breakdowns of operation are physics run 73.8%, machine study 6.8%, machine tuning 4.8%, beam tuning 5.9%, trouble 5.3%, maintenance 2.1% and other 1.3%. The total integrated luminosity was 10⁴¹ fb-1 and the maximum peak luminosity was 21.083 nb-1s⁻¹. To increase the peak and integrated luminosity, the continuous injection scheme, the crab cavities and the skew sextupole magnets were effective. We finished over ten year operation of KEKB in June, 2010.