Sustainable early-stage lasing in a low-emittance electron storage ring

TL;DR

This paper introduces a novel low-emittance electron storage ring capable of sustainable early-stage lasing, enabling efficient short-wavelength radiation generation with potential applications in advanced light sources.

Contribution

It presents a new concept and self-consistent model for a low-emittance storage ring that supports sustainable early-stage lasing, demonstrated through numerical design and analysis.

Findings

Feasibility of generating short-wavelength radiation at kW power levels.

Electron beams can sustain lasing without significant energy loss.

A self-consistent model accurately predicts beam properties during lasing.

Abstract

In this Letter, we report on the concept and analysis of a low-emittance electron storage ring, in which the electron beams undergo an early-stage self-amplified spontaneous emission lasing process on a turn-by-turn basis. The lasing process for each pass through a long undulator in the ring is terminated when the radiated power is still negligible compared to the total synchrotron loss of each circulation, and the electron beams can be maintained in an equilibrium state that supports sustainable lasing. A self-consistent model is derived for evaluation of the properties of the electron beams, and a design with numerical modeling is presented that demonstrates the feasibility of generating short-wavelength radiation at the kW power level.