2014•Institutional Repositories DataBase (IRDB)Open access
SuperKEKB Positron Source Construction Status
T. Kamitani, M. Akemoto, Dai Arakawa, Y. Arakida, Atsushi Enomoto, Shigeki Fukuda, Y. Funakoshi, K. Furukawa, T. Higo, Hiroyuki Honma, N. Iida, Mitsuo Ikeda, E. Kadokura, Hiroshi Kaji, K. Kakihara, Hiroaki Katagiri, M. Kikuchi, Haruyo Koiso, Kurashina, Miho, Shuji Matsumoto, T. Matsumoto, Hideki Matsushita, Shinichiro Michizono, K. Mikawa, T. Mimashi, Takako Miura, F. Miyahara, T. Mori, A. Morita, Hiromitsu Nakajima, Katsumi Nakao, Takuya Natsui, Yujiro Ogawa, Y. Ohnishi, A. Ohsawa, Masanori Sato, Daisuke Satoh, Shidara, Tetsuo, A. Shirakawa, M. Suetake, Hiroshi Sugimoto, T. Suwada, Toshikazu Takatomi, T. Takenaka, Madoka Tanaka, M. Tawada, Y. Yano, K. Yokoyama, Mitsuhiro Yoshida, L. Zang, Xiangyu Zhou
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Abstract
The KEKB positron source is under the upgrade for SuperKEKB. The previous positron production target and capture section have been removed and the new system is constructed at a location forty meters upstream to have sufficient energy margin for beam injection to the newly introduced damping ring. A flux concentrator is introduced in the new capture section to make an adiabatic matching system. Large aperture (30mm in diameter) S-band accelerating structures are introduced in the capture section and in the subsequent accelerator module to enlarge the transverse phase space acceptance. The beam focusing system of quadrupoles is also upgraded for a comparable beam acceptance to that of the capture section. This paper reports on the status of the SuperKEKB positron source construction and the preliminary positron beam commissioning.