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TY - CONF AU - Iida, N. AU - Funakoshi, Y. AU - Ikeda, H. AU - Ishibashi, T. AU - Kaji, H. AU - Kamitani, T. AU - Kikuchi, M. AU - Kobayashi, T. AU - Koiso, H. AU - Miyahara, F. AU - Mori, T. AU - Ohnishi, Y. AU - Seimiya, Y. AU - Sugimoto, H. AU - Sugimura, H. AU - Ueki, R. AU - Yano, Y. AU - Zhou, D. ED - Li, Ying-ying ED - Li, Lu ED - Schaa, Volker RW TI - Commissioning of Positron Damping Ring and the Beam Transport for SuperKEKB J2 - Proc. of eeFACT2018, Hong Kong, China, 24-27 September 2018 CY - Hong Kong, China T2 - ICFA ABDW on High Luminosity Circular e$^+$e$^-$ Colliders T3 - 62 LA - english AB - The Positron Damping Ring (DR) for SuperKEKB successfully started its operation in February 2018, and the commissioning was continued until the end of SuperKEKB Phase 2 in July without serious troubles. This paper describes achievements of the beam commissioning of injection and extraction lines (LTR and RTL) between the LINAC and DR. In the LTR commissioning, the positron beam with high emittance, wide energy spread, and high charge were transported and injected into the DR. In the RTL commissioning, special cares were necessary to preserve the low emittance. The observed emittance growth in the RTL was not a problem for Phase 2, but it should be resolved in the coming Phase 3. In this paper, brief results of the commissioning of the DR is also reported. PB - JACoW Publishing CP - Geneva, Switzerland SP - 152 EP - 156 KW - emittance KW - linac KW - positron KW - MMI KW - operation DA - 2019/04 PY - 2019 SN - 978-3-95450-216-5 DO - DOI: 10.18429/JACoW-eeFACT2018-TUPAB07 UR - http://jacow.org/eefact2018/papers/tupab07.pdf ER -