The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Ohnishi, Y. AU - Funakoshi, Y. AU - Koiso, H. AU - Morita, A. AU - Oide, K. AU - Sugimoto, H. ED - Zhao, Ning ED - Poole, John ED - Schaa, Volker RW TI - Optics Correction and Low Emittance Tuning at the Phase 1 commissioning of SuperKEKB J2 - Proc. of eeFACT2016, Daresbury, UK, October 24-27, 2016 C1 - Daresbury, UK T2 - ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e^+e^- Colliders T3 - 58 LA - english AB - The SuperKEKB collider has finally come to the first commissioning, Phase 1 without the final focus system and before Belle II detector roll-in. In order to accomplish a extremely high luminosity of 8x10³⁵ cm⁻²s⁻¹, the nano-beam scheme is adopted. Since the vertical emittance is one of keys in this scheme, optics corrections for low emittance tuning are applied. The non-interleaved sextupole scheme is utilized in the arc section. Skew quadrupole-like corrector is equipped for each sextupole. These skew quadrupole-like correctors can correct both X-Y coupling and physical vertical dispersions which induce the vertical emittance. Beta function and physical horizontal dispersion are corrected by fudge factors of quadrupoles and/or horizontal orbit bumps at the sextupoles. Overall optics performance as well as the strategy of low emittance tuning is also presented. PB - JACoW CP - Geneva, Switzerland SP - 143 EP - 146 KW - ion KW - sextupole KW - emittance KW - optics KW - coupling DA - 2017/07 PY - 2017 SN - 978-3-95450-187-8 DO - 10.18429/JACoW-eeFACT2016-TUT3BH2 UR - http://jacow.org/eefact2016/papers/tut3bh2.pdf ER -