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TY - CONF AU - Marx, D. AU - Cai, Y. AU - Hoffstaetter, G.H. AU - Li, Y. AU - Montag, C. AU - Nosochkov, Y.M. AU - Tepikian, S. AU - Unger, J.E. AU - Willeke, F.J. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - Dynamic Aperture Optimization in the EIC Electron Storage Ring with Two Interaction Points J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - In the Electron-Ion Collider (EIC), which is currently being designed for construction at Brookhaven National Laboratory, electrons from the electron storage ring will collide with hadrons, producing luminosities up to 10³⁴ cm⁻² s⁻¹. The baseline design includes only one interaction point (IP), and optics have been found with a suitable dynamic aperture in each dimension. However, the EIC project asks for the option of a second IP. The strong focusing required at the IPs creates a very large natural chromaticity (about -125 in the vertical plane for the ring). Compensating this linear chromaticity while simultaneously controlling the nonlinear chromaticity to high order to achieve a sufficient momentum acceptance of 1% (10 σ) at 18 GeV is a considerable challenge. A scheme to compensate higher-order chromatic effects from 2 IPs by setting the phase advance between them does not, by itself, provide the required momentum acceptance for the EIC Electron Storage Ring. A thorough design of the nonlinear optics is underway to increase the momentum acceptance using multiple sextupole families, and the latest results are presented here. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1984 EP - 1987 KW - electron KW - lattice KW - sextupole KW - collider KW - dynamic-aperture DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-TUPAB235 UR - https://jacow.org/ipac2021/papers/tupab235.pdf ER -