DESIGN CONCEPTS FOR THE NGLS LINAC

The Next Generation Light Source (NGLS) is a design concept for a multi beamline soft x-ray FEL array powered by a ~2.4 GeV CW superconducting linear accelerator, operating with a 1 MHz evenly spaced bunch repetition rate. This paper describes the concepts under development for a linac operating at 1.3 GHz and based on minimal modifications to the design of ILC cryomodules in order to leverage the extensive R&D and infrastructure development that resulted from ILC community investments. Due to the different nature of the two applications, particular emphasis is given here to high loaded Q operation and microphonics control, as well as high reliability and operational up time.