9 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…
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…
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…
The Performance of Seeded Free-Electron Lasers Through Dispersion Strength Tuning
Li Zeng, Chao Feng, Xiaofan Wang +2
Over the last decade, external seeded free electron lasers (FELs) have achieved significant advancements across various disciplines, progressively establishing themselves as indisp…
Synthesis of Electron Microbunching Rotation for Generating Isolated Attosecond Soft X-ray Free-electron Laser Pulses
Hao Sun, Xiaofan Wang, Li Zeng +1
Attosecond x-ray pulses play a crucial role in the study of ultrafast phenomena occurring within inner and valence electrons. Especially isolated attosecond pulses with high photon…
Attosecond two-color x-ray free-electron lasers with dual chirp-taper configuration and bunching inheritance
Hao Sun, Xiaofan Wang, Weiqing Zhang
Attosecond x-ray pulses play a crucial role in the study of ultrafast phenomena occurring within inner and valence electrons. To achieve attosecond time-resolution studies and gain…