Longitudinal emittance growth is a critical challenge in RF linacs. We propose a novel solution to mitigate this issue: employing temporally spaced laser pulses to selectively photo-detach electrons from the longitudinal head and tail regions of H- ion bunches. This removal is theorized to reduce particle distributions in the extreme orbits, thereby improving beam uniformity and minimizing...
A thorough understanding of the Longitudinal Phase Space (LPS) of the
electron beam is of great advantage to any modern linear accelerator, and of
critical importance for operating a Free Electron Laser (FEL). A diagnostic system
equipped with a Transverse Deflecting Structure (TDS) allows full imaging
of a beam’s LPS. However, measurements with a TDS are not always easily
accessible and...
The absolute characterization of the electron pulse duration- bunch length - in the ultra-short and low- charge (3-10 pC) operation mode of SwissFEL is relevant to a deeper understanding of the spectral structure and broad-band distribution of the resultant Free-Electron-Laser (FEL) pulse. Under this operation mode of SwissFEL, the output signals of the Bunch-Compressor-Monitor (BCM) in...
