JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Furukawa, K. AU - Ego, H. AU - Enomoto, Y. AU - Iida, N. AU - Kamitani, T. AU - Kawamura, M. AU - Matsumoto, S. AU - Matsumoto, T. AU - Miura, T. AU - Satoh, M. AU - Shirakawa, A. AU - Suwada, T. AU - Yoshida, M. ED - Zimmermann, Frank ED - Tanaka, Hitoshi ED - Sudmuang, Porntip ED - Klysubun, Prapong ED - Sunwong, Prapaiwan ED - Chanwattana, Thakonwat ED - Petit-Jean-Genaz, Christine ED - Schaa, Volker R.W. TI - SuperKEKB Electron Positron Injector Linac Upgrade for Higher Charge and Lower Emittance J2 - Proc. of IPAC2022, Bangkok, Thailand, 12-17 June 2022 CY - Bangkok, Thailand T2 - International Particle Accelerator Conference T3 - 13 LA - english AB - KEK electron positron injector linac has established simultaneous top-up injections in 2019 for 5 rings of SuperKEKB DR, LER, HER, PF ring and PF-AR as a base of the both elementary particle physics and photon science experiments even under a quite short beam lifetime. It improved the injection stabilities while the SuperKEKB broke the world record of the collision luminosity of the previous project KEKB. As the collision performance improves, the beam-beam effect makes the dynamic aperture shrink, and the beam lifetime reduces further. Thus, it became inevitable for the injector to be upgraded in order to resolve the contradictory improvements of higher charge and lower emittance of injection beams regarding beam wakefield till 2025. The upgrade plan is described including pulsed magnets, an energy compression system, accelerating structures, girders, positron generator and so on. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2461 EP - 2464 KW - linac KW - positron KW - emittance KW - electron KW - injection DA - 2022/07 PY - 2022 SN - 2673-5490 SN - 978-3-95450-227-1 DO - doi:10.18429/JACoW-IPAC2022-THPOST011 UR - https://jacow.org/ipac2022/papers/thpost011.pdf ER -