Nonequilibrium electron rings for synchrotron radiation production

TL;DR

This paper proposes a method to surpass the brightness limit of traditional synchrotron radiation sources by using non-equilibrium electron rings with interleaved bunch injection and ejection, enabling higher flux soft X-ray production.

Contribution

It introduces a novel non-equilibrium operation technique for electron rings that can enhance synchrotron radiation brightness beyond equilibrium limits.

Findings

Feasible to use interleaved injection/ejection to exceed brightness limits.

Achieves high current pulses with short kicker pulses for soft X-ray flux.

Potential to adapt existing facilities or build smaller SR rings.

Abstract

Electron storage rings used for the production of synchrotron radiation (SR) have an output photon brightness that is limited by the equilibrium beam emittance. By using interleaved injection and ejection of bunches from a source with repetition rate greater than 1 kHz, we show that it is practicable to overcome this limit in rings of energy ~1 GeV. Sufficiently short kicker pulse lengths enable effective currents of many milliamperes, which can deliver a significant flux of diffraction-limited soft X-ray photons. Thus, either existing SR facilities may be adapted for non-equilibrium operation, or the technique applied to construct SR rings smaller than their storage ring equivalent.