NSLS-II Seminar

Recently, long and high-energy linear accelerator based X-ray Free Electron Laser (XFEL) projects were launched at DESY, SLAC, and SPring-8 to supply coherent, ultra-bright, and ultra-fast hard X-rays. We expect that those XFEL facilities can open various new research fields in biology, chemistry, physics, and material science where femtosecond (or
sub-femtosecond) temporal resolution and atomic-scale spatial resolution are required. Even though future of XFEL projects is very bright, many laboratories failed to get their construction budgets due to huge size and long length of the XFEL facilities. From various experiences of accelerator designs, start-to-end simulations, and commissioning works at several FEL projects and facilities (FLASH and European XFEL of DESY, SCSS and XFEL/SPring-8, PAL-XFEL of PAL, Sapphire Project of Diamond Light Source, Mark-III and OK-5 FEL of Duke University, 250 MeV Injector and PSI-XFEL projects of PSI), recently, speaker found a good way to build a more compact and stable XFEL facility with a lower energy linear accelerator. During this talk, speaker will talk about important beam dynamics and lattice design concepts from the gun to the end of linear accelerator to realize such a more compact XFEL facility with higher performance. Then he will present lattice design works and start-to-end simulation results of one compact XFEL facility, which were mainly done with ASTRA and ELEGANT codes.