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TY - CONF AU - Ohmi, K. AU - Kuroo, N. AU - Oide, K. AU - Zhou, D. AU - Zimmermann, F. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Wake Field and Head-Tail Instability in Beam-Beam Collision with a Large Crossing Angle J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - Head-tail type of coherent beam-beam instability has been seen in a strong-strong beam-beam simulation for collision with a large Piwinski angle σ_{z}θ/σ_{x}>>1, where θ is a half crossing angle. Beta x* is key parameter for the instability. The instability is not serious for SuperKEKB, but can be seen in phase II commissioning stage. It has a large impact for design of FCC-ee. We introduce wake field due to the beam-beam collision. The wake field gives turn-by-turn correlation of head-tail mode. Head-tail instability caused by the wake field explains that seen in the strong-strong beam-beam simulation. PB - JACoW CP - Geneva, Switzerland SP - 3738 EP - 3740 KW - wakefield KW - electron KW - positron KW - simulation KW - dipole DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-THPAB021 UR - http://jacow.org/ipac2017/papers/thpab021.pdf ER -