Speaker
Description
With the development of plasma-based accelerators as a novel acceleration technology, beam phase space manipulation techniques based on plasma wakefields have also gradually begun to be applied, demonstrating their unique advantages in flexibility and device miniaturization compared to traditional beam manipulation techniques. Here, we demonstrate the saturation of a soft X-ray FEL driven by an electron beam that has undergone manipulations within a hollow plasma channel. We show that the plasma wakefield effectively modulates the beam energy while preserving the slice emittance and stability required for high-gain amplification. The manipulated beam drove robust XFEL at a central wavelength of 9.8 nm. The system generated stable, saturated pulses achieving saturation with a maximum single-pulse energy of 91 μJ and exhibited significant spectral tunability. Furthermore, by steering the electron beam within the plasma channel, we observed evidence of ultrafast pulse generation with durations estimated ~5 fs. This work provides a potential route for driving ultrafast XFELs.
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