IPAC'25 - the 16th International Particle Accelerator Conference

Design study of a THz SASE FEL at NSRRC

TUPM034

3 Jun 2025, 16:00

2h

Exhibiton Hall A _Magpie (TWTC)

Poster Presentation MC2.A25 THz sources Tuesday Poster Session

Speaker

Shan-You Teng (National Central Univeristy)

Description

NSRRC has developed a superradiant terahertz (THz) free-electron laser (FEL) that utilizes a photoinjector operating in its velocity bunching mode. This system currently achieves a maximum THz frequency of 1.4 THz, constrained by the shortest electron bunch duration of 240 fsec attainable with the photoinjector. To extend the operation THz range to higher frequencies, we are exploring the potential of implementing a self-amplified spontaneous emission (SASE) FEL in the 3-30 THz regime. This approach is considered to be promising to overcome current frequency limitations and enable access to a broader spectrum of high-intensity THz radiation. In such setup, a dogleg bunch compressor will be installed after the photoinjector, and followed by a dielectric-lined waveguide dechirper to remove residual energy chirp left after bunch compression. The proposed THz SASE FEL is currently under simulation study and will be reported. This effort represents an exciting step forward in broadening the scope and applications of THz science and technology at NSRRC.