6 papers
Attosecond Compression of Relativistic Electron Pulses via Continuous Harmonic Undulator Resonance
Hao Sun, Xiaofan Wang, Xiaozhe Shen +4
Extending megaelectronvolt ultrafast electron diffraction (MeV UED) into the attosecond regime is essential for resolving intrinsic structural dynamics, yet requires simultaneously…
Development of a quadripartite wakefield structure as dechirper for free electron laser
Yu Ji, Congrui Lei, Jiahang Shao +13
Wakefield structures are critical for beam manipulation in free-electron lasers (FELs), particularly when serving as dechirpers, where beam-induced longitudinal wakefields compensa…
Orbit-Controlled Generation of Two-color Attosecond Mode-locked Free-electron Lasers
Tu Lingjun, Sun Hao, Yi Huaiqian +5
The generation of attosecond X-ray pulses has garnered significant attention within the X-ray free-electron laser (FEL) community due to their potential for ultrafast time-resolved…
High-Efficiency Plasma-Based Compressor for Ultrafast Soft X-ray Free-Electron Lasers
Mingchang Wang, Li Zeng, Bingbing Zhang +5
The generation of intense, femtosecond-scale X-ray pulses is crucial for probing matter under extreme temporal and field conditions. Current chirped-pulse amplification (CPA) techn…
Demonstration of Direct-amplification Enabled Harmonic Generation in an Ultraviolet Free-Electron Laser
Hao Sun, Jitao Sun, Li Zeng +14
We report the experimental demonstration of direct-amplification enabled harmonic generation in an ultraviolet free-electron laser (FEL) driven by a low-intensity seed laser. By em…
Stability Enhancement of a Self-Amplified Spontaneous Emission Free-electron Laser with Bunching Containment
Huaiqian Yi, Xiaofan Wang, Li Zeng +2
The self-amplified spontaneous emission (SASE) mechanism, the fundamental operating principle of numerous free-electron laser (FEL) facilities, is driven by electron beam shot nois…