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TY - CONF AU - Sullivan, M.K. ED - Li, Ying-ying ED - Li, Lu ED - Schaa, Volker RW TI - IR Design for High Luminosity and Low Backgrounds 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 - New e⁺e⁻ accelerator designs aim for factory-like performance with high-current beams and high luminosities. These new machines will push interaction region designs to new levels and require a careful evaluation of all previous background sources as well as introduce possibly new background sources. I present here a summary of standard background sources and also suggest a new possible background source for Synchrotron Radiation (SR) namely, specular reflection. In addition, one will have to pay closer attention to the beam tail particle distribution as this may become a significant source of SR background from the high-current and high-energy beams of these new designs. PB - JACoW Publishing CP - Geneva, Switzerland SP - 194 EP - 200 KW - background KW - photon KW - detector KW - luminosity KW - focusing DA - 2019/04 PY - 2019 SN - 978-3-95450-216-5 DO - DOI: 10.18429/JACoW-eeFACT2018-WEXBA01 UR - http://jacow.org/eefact2018/papers/wexba01.pdf ER -