First observation of generation in the backward wave oscillator with a "grid" diffraction grating and lasing of the volume FEL with a "grid" volume resonator

TL;DR

This paper reports the first experimental demonstration of generation in a backward wave oscillator using a 'grid' diffraction grating and also demonstrates lasing in a volume FEL with a 'grid' volume resonator made of metallic threads inside a waveguide.

Contribution

It introduces a novel 'grid' diffraction grating and volume resonator design for backward wave oscillators and FELs, marking a first in experimental observation.

Findings

Successful generation observed in backward wave oscillator with 'grid' diffraction grating.

Lasing achieved in volume FEL with 'grid' volume resonator.

First experimental demonstration of these configurations.

Abstract

First observation of generation in the backward wave oscillator with a "grid" diffraction grating and lasing of the volume FEL with a "grid" volume resonator that is formed by a perodic set of metallic threads inside a rectangular waveguide is considered.