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TY - UNPB AU - Gluskin, E. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Development and Operational Experience of APS Superconducting Undulators J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - Addressing a demand by Advanced Photon Source (APS) users for high-intensity circular polarized photon beams, development has begun at APS on circular polarising undulators. The first such device is currently being built for the APS storage ring. It is based on a superconducting magnet with a conventional double-helical coil structure. This helical superconducting undulator will be completed in 2017. In addition, the concept of a novel SuperConducting Arbitrarily Polarizing Emitter (SCAPE) has been suggested and is now under development. It consists of two pairs, both vertical and horizontal, of superconducting magnets assembled around a beam vacuum chamber. Such a device is capable of generating either planar or circular polarized photons, depending on which pair of magnets is energized. The SCAPE undulators could be attractive for the APS Upgrade and other fourth-generation storage rings with a multi-bend achromat lattice, as well as for FELs where utilization of round beam vacuum chambers becomes possible. This invited talk presents the status of work on the helical SCU, as well as a conceptual design of the SCAPE. PB - JACoW Publishing CP - Geneva, Switzerland ER -