Seeded quantum FEL at 478 keV

TL;DR

This paper introduces the concept of a seeded gamma quantum free-electron laser at 478 keV, aiming to produce highly intense, coherent gamma beams using novel focusing and monochromator technologies, marking a significant advancement in high-energy photon sources.

Contribution

The paper proposes the first design for a seeded gamma quantum FEL at 478 keV, utilizing quantum FEL principles and novel gamma optics to generate coherent high-energy gamma beams.

Findings

Conceptual demonstration of a seeded gamma QFEL at 478 keV.

Identification of novel gamma lenses and monochromator for beam production.

Highlighting the necessity of quantum FEL models at high photon energies.

Abstract

We present for the first time the concept of a seeded {\gamma} quantum Free-Electron-Laser (QFEL) at 478 keV, which has very different properties compared to a classical. The basic concept is to produce a highly brilliant {\gamma} beam via SASE. To produce highly intense and coherent {\gamma} beam, we intend to use a seeded FEL scheme. Important for the production of such a {\gamma} beam are novel refractive {\gamma} -lenses for focusing and an efficient monochromator, allowing to generate a very intense and coherent seed beam. The energy of the {\gamma} beam is 478 keV, corresponding to a wavelength in the sub-{\AA}ngstr{\o}m regime (1/38 {\AA}). To realize a coherent {\gamma} beam at 478 keV, it is necessary to use a quantum FEL design. At such high radiation energies a classical description of the {\gamma}-FEL becomes wrong.