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Tunable High Spatio-Spectral Purity Undulator Radiation from a Transported Laser Plasma Accelerated Electron Beam.

Abstract：

:Undulator based synchrotron light sources and Free Electron Lasers (FELs) are valuable modern probes of matter with high temporal and spatial resolution. Laser Plasma Accelerators (LPAs), delivering GeV electron beams in few centimeters, are good candidates for future compact light sources. However the barriers set by the large energy spread, divergence and shot-to-shot fluctuations require a specific transport line, to shape the electron beam phase space for achieving ultrashort undulator synchrotron radiation suitable for users and even for achieving FEL amplification. Proof-of-principle LPA based undulator emission, with strong electron focusing or transport, does not yet exhibit the full specific radiation properties. We report on the generation of undulator radiation with an LPA beam based manipulation in a dedicated transport line with versatile properties. After evidencing the specific spatio-spectral signature, we tune the resonant wavelength within 200-300 nm by modification of the electron beam energy and the undulator field. We achieve a wavelength stability of 2.6%. We demonstrate that we can control the spatio-spectral purity and spectral brightness by reducing the energy range inside the chicane. We have also observed the second harmonic emission of the undulator.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Ghaith A,Oumbarek D,Roussel E,Corde S,Labat M,André T,Loulergue A,Andriyash IA,Chubar O,Kononenko O,Smartsev S,Marcouillé O,Kitégi C,Marteau F,Valléau M,Thaury C,Gautier J,Sebban S,Tafzi A,Blache F,Briquez F,Tav

doi

10.1038/s41598-019-55209-4

subject

Has Abstract

pub_date

2019-12-13 00:00:00

pages

19020

issue

1

issn

2045-2322

pii

10.1038/s41598-019-55209-4

journal_volume

9

pub_type

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