Optical control of hard X-ray polarization by electron injection in a laser wakefield accelerator

  title={Optical control of hard X-ray polarization by electron injection in a laser wakefield accelerator},
  author={Michael Schnell and Alexander S{\"a}vert and Ingo Uschmann and Maria Reuter and Maria Nicolai and Tino K{\"a}mpfer and Bj{\"o}rn Landgraf and Oliver J{\"a}ckel and O. Jansen and Alexander Pukhov and Malte Christoph Kaluza and Christian Spielmann},
  journal={Nature Communications},
Laser-plasma particle accelerators could provide more compact sources of high-energy radiation than conventional accelerators. Moreover, because they deliver radiation in femtosecond pulses, they could improve the time resolution of X-ray absorption techniques. Here we show that we can measure and control the polarization of ultra-short, broad-band keV photon pulses emitted from a laser-plasma-based betatron source. The electron trajectories and hence the polarization of the emitted X-rays are… 

Characterization and application of hard x-ray betatron radiation generated by relativistic electrons from a laser-wakefield accelerator

The necessity for compact table-top x-ray sources with higher brightness, shorter wavelength and shorter pulse duration has led to the development of complementary sources based on laser-plasma

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Three-dimensional particle-in-cell simulations are used to propose a scheme to realize controllable electron dynamics and X-ray radiation in laser wakefield-based X-rays, leading to tunable radiations both in intensity and polarization.

Stable femtosecond X-rays with tunable polarization from a laser-driven accelerator

This article demonstrates the reliable production of X-ray beams with tunable polarization using ionization-induced injection in a gas mixture, and observes that both the signal and beam profile fluctuations are significantly reduced and that the beam pointing varies by less than a tenth of the beam divergence.

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It is demonstrated that a radiation source with millimeter size and peak brilliance of 2 × 1019 photons/s/mm2/mrad2/0.1% bandwidth can be made with moderate laser and electron beam parameters, suggesting that laser plasma based radiation sources are promising for advanced applications.

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Ultrafast high-brightness X-ray pulses have proven invaluable for a broad range of research. Such pulses are typically generated via synchrotron emission from relativistic electron bunches using

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Our previous experimental and three-dimensional (3D) particle-in-cell (PIC) simulation results demonstrated that a well-directed electron beam with space charge of about μC and maximum energy of 100

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Laser-wakefield accelerators (LWFAs) were proposed more than three decades ago, and while they promise to deliver compact, high energy particle accelerators, they will also provide the scientific

The X-Ray Emission Effectiveness of Plasma Mirrors: Reexamining Power-Law Scaling for Relativistic High-Order Harmonic Generation

The numerical results support the ω −4/3 scaling of the synchrotron emission model as a limiting efficiency of the process under most conditions, and suggest that with a 20-PW 800-nm driving laser, 1 TW/harmonic can be produced for 1-keV photons.

Gamma-ray emission from wakefield-accelerated electrons wiggling in a laser field

A new method for achieving high-energy radiation via accelerated electrons wiggling in an additional laser field whose intensity is one order of magnitude higher than that for the self-generated transverse field of the bubble, resulting in an equivalent wiggler strength parameter K increase of approximately twenty times.



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Ultrashort light pulses are powerful tools for time-resolved studies of molecular and atomic dynamics1. They arise in the visible and infrared range from femtosecond lasers2, and at shorter

Laser-driven soft-X-ray undulator source

High-intensity X-ray sources such as synchrotrons and free-electron lasers need large particle accelerators to drive them. The demonstration of a synchrotron X-ray source that uses a laser-driven

Femtosecond x rays from laser-plasma accelerators

Relativistic interaction of short-pulse lasers with underdense plasmas has recently led to the emergence of a novel generation of femtosecond x-ray sources. Based on radiation from electrons

Deducing the electron-beam diameter in a laser-plasma accelerator using x-ray betatron radiation.

The properties of a laser-plasma electron accelerator as a bright source of keV x-ray radiation is investigated and the oscillation amplitude of the electrons can be deduced which decreases with increasing electron energies.

Laser-wakefield acceleration of monoenergetic electron beams in the first plasma-wave period.

Beam profile measurements of laser-wakefield accelerated electron bunches reveal that in the monoenergetic regime the electrons are injected and accelerated at the back of the first period of the

All-optical steering of laser-wakefield-accelerated electron beams.

Evidence of collective electron-betatron oscillations due to off-axis electron injection into the wakefield induced by a pulse-front tilt is discovered and allowed for reproducible electron-beam steering within an 8 mrad opening window with respect to the initial laser axis.

Laser based synchrotron radiation

Beams of x rays in the kiloelectronvolt energy range have been produced from laser-matter interaction. Here, energetic electrons are accelerated by a laser wakefield, and experience betatron

Design considerations for table-top, laser-based VUV and X-ray free electron lasers

A recent breakthrough in laser-plasma accelerators, based upon ultrashort high-intensity lasers, demonstrated the generation of quasi-monoenergetic GeV-electrons. With future Petawatt lasers

GeV electron beams from a centimetre-scale accelerator

Gigaelectron volt (GeV) electron accelerators are essential to synchrotron radiation facilities and free-electron lasers, and as modules for high-energy particle physics. Radiofrequency-based

Direct observation of betatron oscillations in a laser-plasma electron accelerator

During experiments performed on a laser-plasma–based accelerator, correlation of the electron output angle with the electron energy has been observed. These spectral oscillations of the electron beam