All-optical Terahertz-driven Photogun

by Prof. Dongfang Zhang (Shanghai Jiao Tong University, China)

Wednesday 12 Feb 2025, 13:00 → 14:00 Europe/Berlin

XHQ / E1.173 (European XFEL Schenefeld)

Recent advancements in terahertz (THz) based electron manipulation and acceleration have shown significant potential for developing compact, cost-effective electron sources. In this talk, I will present our latest contributions, which include the development of a multifunctional THz-driven photogun [1,3]. This device enables high-gradient acceleration up to 3 GV/m and generates a high-quality electron beam suitable for femtosecond (fs) ultrafast imaging applications. Additionally, I will introduce a two-dimensional electron diagnostic scheme that achieves femtosecond temporal resolution and offers a scalable time window for real-time electron temporal profile measurements [2]. These developments represent a critical milestone in the evolution of all-optical THz-driven electron devices, highlighting the technology’s maturity and its potential for precision applications.

1. J. Ying, et al., High gradient terahertz-driven ultrafast photogun. Nature Photonics 18, 758-765 (2024) (Featured on the cover).

2. X. He, et al., Terahertz-driven Two-Dimensional Mapping for Electron Temporal Profile Measurement. arXiv:2412.04108

3. D. Zhang, et al., Segmented Terahertz Electron Accelerator and Manipulator (STEAM). Nature Photonics 12, 336–342 (2018) (Featured on the cover).

 

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https://xfel.zoom.us/j/98977274641?pwd=xNu6q524PhUKLQwhzacVTbafoHkRXb.1

 

Meeting ID: 989 7727 4641

Passcode: 371468