| アブストラクト: |
An X-ray synchrotron light source, a multi-GeV ERL, is one of the targets of our Japanese collaboration towards future ERL light sources. As an option of the multi-GeV ERL, we consider an X-ray FEL oscillator (XFEL-O) to produce hard X-ray pulses with excellent temporal coherence. In this study, we present simulation results of the XFEL-O such as FEL lasing including spectral narrowing and nonlinear phase shift at Bragg reflectors. We also propose a scheme of velocity bunching in an ERL main linac for X-FELO operation. The velocity bunching brings significant enhancement of the small-signal gain and an X-FELO at 0.1 nm is feasible with a 5-GeV electron beam from the ERL light source planned in Japan. |
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