The new free electron laser facility Linear Coherent Light Source II (LCLS-II) under construction at SLAC National Accelerator Laboratory will use planar variable gap undulators of hybrid type for the production of free electron laser (FEL) radiation. The LCLS-II will include two FELs with two separate rows of undulators to generate soft and hard x-rays. The soft x-rays will be produced by undulators with 39 mm period length (SXR) and the hard x-rays will be produced by undulators with 26 mm period length (HXR). Both the SXR and the HXR undulators are 3.4 m long and they use a common support structure and frame. In total 21 SXR and 32 HXR undulators will be produced by Lawrence Berkeley National Laboratory in collaboration with SLAC National Accelerator Laboratory. A full-scale prototype with 32 mm period length, called HXU, has been assembled at Lawrence Berkeley National Laboratory (LBNL). The present status of the design, prototyping, and pre-series production of the SXR and HXR undulators are presented in this paper together with the first results from measurements on the full scale HXU prototype.
Status of the LCLS-II undulators
E. Wallén, D. Arbelaez, A. Brown, M. D’Ewart, J. Dougherty, J. Corlett, A. DeMello, K. Hanzel, J.-Y. Jung, M. Leitner, A. Madur, K. McCombs, S. Marks, D. Munson, D. Plate, J. Pucci, M. Rowen, K. Ray, R. Schlueter, E. San Mateo; Status of the LCLS-II undulators. AIP Conf. Proc. 27 July 2016; 1741 (1): 020025. https://doi.org/10.1063/1.4952804
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