Speaker
Dr
Ibrahim Kesgin
(Argonne National Laboratory)
Description
Undulators are very important insertion devices for storage ring and free electron laser based light sources to produce high-brilliance hard X-ray photon beams. NbTi based superconductive undulators (SCUs) have been recently developed and shown to reach higher on-axis peak fields compared to the field values achieved with conventional undulators. However, cooling NbTi coils to 4.2 K requires complicated and expensive cryogenic equipment. High temperature superconductors (HTSs) have larger temperature stability margin; therefore, they can be operated at higher temperatures than NbTi greatly simplifying the cryogenic design. The engineering current densities of REBCO HTS wires have been also enhanced drastically during the past years. Because of these reasons, HTS undulators have recently become very attractive. Here, we discuss a design for a second-generation (2G) HTS undulator and address some of the problems related to resistive joints and winding schemes of the coils. In addition, the achievable on-axis peak field at 4.2 K has been calculated and shown to surpass that reached in NbTi-undulators.
Author
Dr
Ibrahim Kesgin
(Argonne National Laboratory)
Co-authors
Dr
Charless L. Doose
(Argonne National Laboratory)
Mr
Matthew T. Kasa
(Argonne National Laboratory)
Dr
Ulrich Welp
(Argonne National Laboratory)
Dr
Yury Ivanyushenkov
(Argonne National Laboratory)
