2010•Unpublished venueRequires access
Injector Linac Upgrade for SuperKEKB
T. Kamitani, M. Akemoto, D.A.Arakawa, Atsushi Enomoto, Shigeki Fukuda, K. Furukawa, T. Higo, Hiroaki Honma, K. Hosoyama, N. Iida, Mitsuo Ikeda, E. Kadokura, K. Kakihara, Hideaki Katagiri, M. Kikuchi, Yuuji Kojima, Miho Kurashina, Shuji Matsumoto, T. Matsumoto, Hideki Matsushita, Shinichiro Michizono, K. Mikawa, T. Mimashi, Takako Miura, H. Nakajima, Koichi Nakanishi, K. Nakao, Y. Ogawa, A. Ohsawa, Toshiya Sanami, Masanori Satoh, T. Shidara, A. Shirakawa, T. Sugimura, T. Suwada, T. Takenaka, M. Tawada, Y. Yano, K. Yokoyama, M. Yoshida
Open publisher page 7 citations
Abstract
In the forthcoming upgrade of the KEK-B factory to SuperKEKB, beam currents in the storage rings will be doubled and beam lifetimes will be ten times shorter. To make up for rapid decrease of the stored currents, several times higher linac beam intensities are required both in electrons and positrons. To achieve extremely high luminosity in the SuperKEKB, beam emittance has to be very low. Emittance of injected beams from the linac should be reduced to be five times smaller for electrons and two hundred times smaller for positrons compared to those of KEKB. To realize these low-emittance and high intensity beams from the linac, the electron pre-injector will be upgraded with a new electron-gun, the positron capture section will be upgraded for higher positron intensity and a positron damping ring will be introduced to make a positron emittance sufficiently small. This paper reports on design considerations in the linac upgrade for SuperKEKB.