Abstract :
The present B-factories, KEKB and PEP-II, have achieved or exceeded their design luminosities. A luminosity of 1034 cm-2 s-1 has become a reality. As upgrading of these machines to increase the luminosity further by ten times or more to extend the physics coverage, Super B-factories are being considered. Beam current should be about 10 A in the Low Energy Ring (LER) and 4 A in the High Energy Ring (HER), or even much higher, with a short bunch length of about 3 mm. It is very challenging for various hardware components, especially for RF system and beam-line vacuum components, to store such an extremely high beam current. Crab crossing is also considered to drastically increase the beam-beam tune shift limit, that results in a further increase of the luminosity. In this paper, high intensity issues for the Super B-factories are discussed.
Keywords :
accelerator RF systems; electron accelerators; feedback; particle beam bunching; particle beam diagnostics; particle beam stability; storage rings; RF system; beam current; beam-beam tune shift limit; beam-line vacuum components; crab crossing; design luminosities; electron-positron colliders; hardware components; super B-factories; Hardware; Linear particle accelerator; Magnets; Mesons; Particle beams; Physics; Production facilities; Radio frequency; Vacuum systems; Voltage;
