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  Goslawski, P.; Abo-Bakr, M.; Bengtsson, J.; Holldack, K.; Hüsges, Z.; Jankowiak, A.; Kiefer, K.; Kuske, B.; Meseck, A.; Müller, R.; Sauerborn, M.; Schwarzkopf, O.; Viefhaus, J.; Völker, J.: A Highly Competitive Non-Standard Lattice for a 4th Generation Light Source With Metrology and Timing Capabilities. In: Hans-Heinrich Braun ... [Ed.] : FLS2023 : Proceedings of the 67th ICFA Advanced Beam Dynamics Workshop on Future Light Sources, Swiss Museum of Transport in Lucerne, 27 August–1 September 2023Geneve: JACoW, 2023. - ISBN 978-3-95450-224-0, p. TU1B1/1-4

Open Access Version

Abstract:
The PTB, Ger­many’s na­tional in­sti­tute for stan­dards and metrol­ogy, has re­lied on syn­chro­tron ra­di­a­tion for metrol­ogy pur­poses for over 40 years and the most promi­nent cus­tomers are lith­o­g­ra­phy sys­tems from ASML/ZEIS. HZB is now work­ing on a con­cept for a BESSY II suc­ces­sor, based on a 4th gen­er­a­tion light source with an emit­tance of 100 pmrad @ 2.5 GeV. It is es­sen­tial, that this new fa­cil­ity con­tin­ues to serve the PTB for metrol­ogy pur­poses. This sets clear bound­ary con­di­tions for the lat­tice de­sign, in par­tic­u­lar, the need for ho­mo­ge­neous bends as metro­log­i­cal ra­di­a­tion sources. Dif­fer­ent Higher-Or­der-Multi-Bend-Achro­mat lat­tices have been de­vel­oped, based on com­bined func­tion gra­di­ent bends and ho­mo­ge­neous bends in a sys­tem­atic lat­tice de­sign ap­proach. All lat­tices are lin­early equiv­a­lent with the same emit­tance and max­i­mum field strength. How­ever, they dif­fer sig­nif­i­cantly in their non-lin­ear be­hav­ior. Based on this analy­sis, the choice of the BESSY III lat­tice type is mo­ti­vated. A spe­cial focus is set also on TRIBs (Trans­verse Res­o­nance Is­land Buck­ets) to op­er­ate with two or­bits as a bunch sep­a­ra­tion scheme in MBAs, for dif­fer­ent rep­e­ti­tion rates or for the sep­a­ra­tion of short and long bunches.