JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Hoummi, L. AU - Brochard, T. AU - Carmignani, N. AU - Carver, L.R. AU - Chavanne, J. AU - Liuzzo, S.M. AU - Perron, T.P. AU - Raimondi, P. AU - Versteegen, R. AU - White, S.M. ED - Zimmermann, Frank ED - Tanaka, Hitoshi ED - Sudmuang, Porntip ED - Klysubun, Prapong ED - Sunwong, Prapaiwan ED - Chanwattana, Thakonwat ED - Petit-Jean-Genaz, Christine ED - Schaa, Volker R.W. TI - Off-Energy Operation for the ESRF-EBS Storage Ring J2 - Proc. of IPAC2022, Bangkok, Thailand, 12-17 June 2022 CY - Bangkok, Thailand T2 - International Particle Accelerator Conference T3 - 13 LA - english AB - The ESRF-EBS is the first 4th generation source making use of the Hybrid Multi-Bend Achromat (HMBA) lattice cell, reaching an equilibrium horizontal emittance of 140 pm.rad in user mode (insertion devices (ID) gaps open). The injection in the storage ring (SR) is conducted with a short booster, operated off-energy. The RF frequency is increased compared to the nominal one to put the beam on a dispersive orbit, thus going off-axis in quadrupoles. The induced dipolar feed down effects reduce the booster horizontal emittance. The same strategy is extended to the ESRF-EBS SR, for an expected emittance reduction of about 20 pm.rad. A first approach shifts the RF frequency by +300 Hz to operate at -1% energy offset. Optimal quadrupole and sextupole settings are defined for this off-energy operation based on simulations. The settings are then tested in the SR in terms of dynamic aperture and injection efficiency. PB - JACoW Publishing CP - Geneva, Switzerland SP - 437 EP - 440 KW - optics KW - SRF KW - injection KW - sextupole KW - lattice DA - 2022/07 PY - 2022 SN - 2673-5490 SN - 978-3-95450-227-1 DO - doi:10.18429/JACoW-IPAC2022-MOPOTK006 UR - https://jacow.org/ipac2022/papers/mopotk006.pdf ER -