Asymmetric B-factory project at KEK

Conference · Wed Oct 10 04:00:00 EDT 1990 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:5968839

Funakoshi, Y; Anami, M; Asami, A; Enomoto, S; Hanaoka, K; Kageyama, T; Kanazawa, K; Kikutani, E; Kobayashi, J; Koiso, H; Kurokawa, S; Ohsawa, T; Oide, K; Sakanaka, S; Satoh, K; Shidara, T; Suetake, M; Takasaki, F; Yamazaki, Y ^[1]

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1. KEK, National Laboratory for High Energy Physics, 1-1 Oho, Tsukuba-shi, Ibaraki-ken, 305 (Japan)

The present machine design of the future asymmetric B-factory at KEK is reviewed. Beam energies and a design luminosity are chosen as 8{times}3.5 GeV{sup 2} and 1{times}10{sup 34}/cm{sup 2}/sec in due consideration of requirements from physics experiments. In the design, it is aimed to squeeze the vertical beta-function at IP ({beta}*{sub {ital y}}) to 1 cm. The beam-beam limit is assumed to be 0.05 with the requirement that the bunch length should be half of {beta}*{sub {ital y}}, i.e., 0.5 cm. Flat beams are chosen. In order to attain the design luminosity, beam currents of 2.6 A for the 3.5 GeV ring and 1.1 A for the 8 GeV ring are necessary. An all RF buckets filling scheme and a crab crossing scheme are adopted to realize the short bunches and to decrease RF voltages. The damped cavity is adopted to suppress the coupled bunch instability. Growth rates of the instability are estimated in the case that the damped cavities are used. Further extensive studies and R D's are necessary to realize the design luminosity.

• OSTI ID: 5968839
• Report Number(s): CONF-9002118--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 214:1
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430400* -- Particle Accelerators-- Storage Rings
B MESONS
BEAM BUNCHING
BEAM CURRENTS
BEAM DYNAMICS
BEAM LUMINOSITY
BEAM-BEAM INTERACTIONS
BOSONS
CURRENTS
DATA
DESIGN
ELEMENTARY PARTICLES
ENERGY RANGE
FEASIBILITY STUDIES
GEV RANGE
GEV RANGE 01-10
HADRONS
INFORMATION
INSTABILITY
MESONS
NUMERICAL DATA
PSEUDOSCALAR MESONS
RF SYSTEMS
STORAGE RINGS
THEORETICAL DATA
TRISTAN STORAGE RINGS