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TY - CONF AU - Furukawa, K. AU - Iida, N. AU - Kamitani, T. AU - Kazama, S. AU - Miura, T. AU - Miyahara, F. AU - Ohnishi, Y. AU - Satoh, M. AU - Suwada, T. AU - Yokoyama, K. ED - Corvetti, Lou ED - Riches, Kathleen ED - Schaa, Volker RW TI - Beam Property Management at KEK Electron/Positron 7-GeV Injector Linac J2 - Proc. of ICALEPCS2015, Melbourne, Australia, 17-23 October 2015 C1 - Melbourne, Australia T2 - International Conference on Accelerator and Large Experimental Physics Control Systems T3 - 15 LA - english AB - The electron/positron injector linac at KEK has injected a variety of beams into the electron accelerator complex of SuperKEKB collider and light sources for particle physics and photon science experiments for more than 30 years. The beam property of electrons and positrons varies in energy from 2.5 GeV to 7 GeV and in bunch charge from 0.2 nC to 10 nC, and their stability requirements are different depending on the injected storage ring. They have to be switched by pulse-to-pulse modulation at 50 Hz. The emittance control is especially crucial to achieve the goal at SuperKEKB and is under development. The beam energy management becomes more important as it affects all of the beam properties. Beam acceleration provided by 60 RF power station should be properly distributed considering redundancy and stability. Thus, the equipment controls are also restructured in order to enable the precise control of the beam properties, based on the synchronized event control system and EPICS control system. The strategy and status of the upgrade is described in this paper from the practical aspects of device controls, online simulation and operation. PB - JACoW CP - Geneva, Switzerland SP - 1123 EP - 1126 KW - database KW - controls KW - linac KW - emittance KW - electron DA - 2015/12 PY - 2015 SN - 978-3-95450-148-9 DO - 10.18429/JACoW-ICALEPCS2015-THHC2O01 UR - http://jacow.org/icalepcs2015/papers/thhc2o01.pdf ER -