Quantum self-amplified spontaneous emission regime of the x-ray Compton laser

H K Avetissian,G F Mkrtchian

doi:10.1103/physrevstab.10.030703

H K Avetissian, G F Mkrtchian

Open Access

https://doi.org/10.1103/physrevstab.10.030703

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Abstract

In this work we consider in general the high-gain SASE x-ray Compton FEL in the quantum regime of amplification arising from the self-consistent set of the Maxwell and relativistic quantum kinetic equations. The analytical solutions are obtained which are valid before the saturation. The quantum seed-shot noise and subsequent SASE power are calculated. A considerable increase in start-up and narrowing of the spectrum of the SASE power for amplifying x-ray frequencies is shown compared with the classical SASE regime.

Highlights

The creation of x-ray lasers is a subject of extreme interest at the present time, and numerous projects around the world are focused on the development of so-called fourth generation light sources
The problem of creation of short-wave coherent electromagnetic radiation sources in general aspects reduces to the implementation of freeelectron lasers (FEL) [1]
Regarding the problem of the x-ray FEL, there is an actual design currently in progress based on the FEL in the undulator [2]

Summary

INTRODUCTION

The creation of x-ray lasers is a subject of extreme interest at the present time, and numerous projects around the world are focused on the development of so-called fourth generation light sources. The nonlinear single-pass steady-state quantum regimes were considered in [9] for the x-ray Compton and undulator FELs in the regime when the quantum recoil is much larger than the electron beam energy spreads and electron beam momentum distribution is centered at the exact resonant condition for x-ray emission The operation of this quantum regime is similar to conventional atomic lasers (two momentum states are involved in the interaction process) and one can expect a new, unexplored quantum SASE regime of FEL [10]. A scheme of x-ray coherent radiation generation in the quantum high gain and SASE regimes by means of a mildly relativistic high-density electron beam and a strong pump laser field is investigated.

QUANTUM HIGH-GAIN REGIME

QUANTUM SASE REGIME OF FEL

CONCLUSION