LINAC2026 - 33rd Linear Accelerator Conference

Design and optimization of a compact THz-FEL oscillator with planar undulator

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC2.A04: FELs Poster Session

Speaker

Mr Chenyu Ji (Huazhong University of Science and Technology)

Description

In a THz FEL oscillator, the undulator and optical cavity are the key components for radiation. In this paper, we present an integrated optimization of the systematical parameters under the requirement of high compactness. The joint influence of the undulator and resonator on the FEL performance introduces a multi-parameter coupling that complicates the design. To address this, we simplify the optimization through dimensionality reduction, and then globally tune both sets of parameters to maximize the micropulse and macropulse energy. The joint GENESIS and OPC simulations show that, with an electron energy of 15 MeV and beam current of 100 A, the output micropulse and macropulse powers could reach 2.5 MW and 4.8 kW respectively, and the wavelength could be tuned continuously across the range of 30-100μm.