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TY - CONF AU - Kamitani, T. AU - Akemoto, M. AU - Arakawa, D.A. AU - Arakida, Y. AU - Enomoto, A. AU - Fukuda, S. AU - Funakoshi, Y. AU - Furukawa, K. AU - Higo, T. AU - Honma, H. AU - Iida, N. AU - Ikeda, M. AU - Kadokura, E. AU - Kaji, H. AU - Kakihara, K. AU - Katagiri, H. AU - Kikuchi, M. AU - Koiso, H. AU - Kurashina, M. AU - Matsumoto, S. AU - Matsumoto, T. AU - Matsushita, H. AU - Michizono, S. AU - Mikawa, K. AU - Mimashi, T. AU - Miura, T. AU - Miyahara, F. AU - Mori, T. AU - Morita, A. AU - Nakajima, H. AU - Nakao, K. AU - Natsui, T. AU - Ogawa, Y. AU - Ohnishi, Y. AU - Ohsawa, S. AU - Sato, M. AU - Satoh, D. AU - Shidara, T. AU - Shirakawa, A. AU - Suetake, M. AU - Sugimoto, H. AU - Suwada, T. AU - Takatomi, T. AU - Takenaka, T. AU - Tanaka, M. AU - Tawada, M. AU - Yano, Y. AU - Yokoyama, K. AU - Yoshida, M. AU - Zang, L. AU - Zhou, X. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - SuperKEKB Positron Source Construction Status J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - 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. PB - JACoW CP - Geneva, Switzerland SP - 579 EP - 581 KW - positron KW - electron KW - target KW - solenoid KW - operation DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-MOPRI004 UR - http://jacow.org/ipac2014/papers/mopri004.pdf ER -