# Sub - THz Radiation from Dielectric Capillaries with Reflectors

## TL;DR

This paper reports experimental and simulation studies on THz radiation generated from dielectric capillaries with reflectors, examining angular distributions and beam propagation effects using femtosecond electron beams at KEK, Japan.

## Contribution

It provides new experimental data and simulation comparisons on THz radiation from corrugated and non-corrugated dielectric capillaries with reflectors.

## Key findings

- Angular distribution measurements match simulations
- Beam off-centering affects radiation characteristics
- Corrugated and non-corrugated capillaries produce comparable THz radiation

## Abstract

In this report we present experimental investigations of THz radiation generated from a corrugated and a non-corrugated capillary with reflectors, using a femtosecond electron beam of LUCX accelerator at KEK, Japan. We discuss measurements of radiation angular distributions and their comparison with Particle In Cell simulations, and also investigate an off-central propagation of the beam in the capillaries based on experimental measurements and simulations.

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Source: https://tomesphere.com/paper/1706.03054