Publications (12)
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…
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…
Energy recovery operation for continuous-wave X-ray free-electron lasers
Guanglei Wang, Jiawei Yan, Nanshun Huang +7
A superconducting linear accelerator operating in continuous-wave mode could produce X-ray free electron lasers (XFEL) at megahertz repetition rate, with the capability that delive…
Ultra-high harmonic conversion of a seeded free-electron laser via harmonic optical klystron
Xiaofan Wang, Li Zeng, Weiqing Zhang +1
External seeded free-electron lasers (FELs) are compelling tools for generating fully coherent EUV and soft X-ray radiations. Echo-enabled harmonic generation (EEHG), the most typi…
The Anion Effect on Li+ Ion Coordination Structure in Ethylene Carbonate Solutions
Bo Jiang, Veerapandian Ponnuchamy, Yuneng Shen +7
Rechargeable lithium ion batteries are an attractive alternative power source for a wide variety of applications. To optimize their performances, a complete description of the solv…
Every FLOP Counts: Scaling a 300B Mixture-of-Experts LING LLM without Premium GPUs
Ling Team, Binwei Zeng, Chao Huang +71
In this technical report, we tackle the challenges of training large-scale Mixture of Experts (MoE) models, focusing on overcoming cost inefficiency and resource limitations preval…