THz-radiation production using dispersively-selected flat electron bunches

TL;DR

This paper introduces a novel, tunable THz radiation source using dispersive selection and flat electron bunches, capable of generating narrow-band or single-frequency THz radiation across 0.2 to 4 THz.

Contribution

It presents a new method combining dispersive selection and flat beam transformation to produce tunable, narrow-band THz radiation with a wide frequency range.

Findings

Achieves tunable THz radiation from 0.2 to 4 THz.

Enables generation of narrow-band and single-frequency THz spectra.

Utilizes a slit mask and beam shaping techniques for control.

Abstract

We propose an alternative scheme for a tunable THz radiation source generated by relativistic electron bunches. This technique relies on the combination of dispersive selection and flat electron bunch. The dispersive selection uses a slit mask inside a bunch compressor to transform the energy-chirped electron beam into a bunch train. The flat beam transformation boosts the frequency range of the THz source by reducing the beam emittance in one plane. This technique generates narrow-band THz radiation with a tuning range between 0.2 - 4 THz. Single frequency THz spectrum can also be generated by properly choosing the slit spacing, slit width, and the energy chirp.