Speaker
Description
Cavity-based X-ray free-electron lasers (CBXFELs), including the X-ray regenerative amplifier FEL (XRAFEL) and the XFEL oscillator (XFELO), have been proposed as sources of highly coherent and stable hard X-rays. XRAFELs can generate high-peak-power X-ray pulses with bandwidths limited by Bragg-crystal filtering, whereas XFELOs provide much narrower bandwidths but at substantially lower peak power. In this work, we introduce an ultra-bright CBXFEL scheme that uses a staged configuration to simultaneously enhance peak power and reduce bandwidth. Start-to-end simulations show that this approach can be applied to high-repetition-rate FEL facilities to generate ultra-bright hard X-ray pulses, enabling a further two to three orders of magnitude improvement in spectral flux compared with existing CBXFEL designs.
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