Compact narrow-band THz radiation source based on photocathode rf gun

2013/05/29 by Weiwei Li, Wei-Wei, Li, Zhigang He +2
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Particle Accelerators and Free-Electron Lasers #Terahertz technology and applications

paper · pdf · doi:10.48550/arxiv.1305.6787

openalex publication_date 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Narrow-band THz coherent Cherenkov radiation can be driven by a subpicosecond electron bunch traveling along the axis of a hollow cylindrical dielectric-lined waveguide. We present a scheme of compact THz radiation source based on the photocathode rf gun. On the basis of our analytic result, the subpicosecond electron bunch with high charge (800pC) can be generated directly in the photocathode rf gun. A narrow emission spectrum peaked at 0.24 THz with 2 megawatt (MW) peak power is expected to gain in the proposed scheme (the length of the facility is about 1.2 m), according to the analytical and simulated results.

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