Towards a free electron laser based on laser plasma accelerators

Couprie, Marie-Emmanuelle; Loulergue, Alexandre; Labat, M.; Lehe, Rémi; Malka, Victor

doi:10.1088/0953-4075/47/23/234001

Cited by 54 publications

(39 citation statements)

References 136 publications

(140 reference statements)

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“…To deal with those realistic high energy spread and high divergence, three techniques have been proposed: horizontally disperse and couple the beam in a Transverse Gradient Undulator (Huang et al, 2012), decompress and couple the beam in a suitably tapered undulator (Maier et al, 2012;Seggebrock et al, 2013;Couprie et al, 2014) and finally decompress and synchronize the beam waist advance with the FEL slippage (Loulergue et al, 2015). While previous methods have never been implemented, the chromatic matching is presently being tested on COXINEL (Couprie et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Electron and photon diagnostics for plasma acceleration-based FELs

Labat

Ajjouri

Hubert

et al. 2018

J Synchrotron Radiat

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It is now well established that laser plasma acceleration (LPA) is an innovative and good candidate in the beam acceleration field. Relativistic beams are indeed produced up to several GeV but their quality remains to be demonstrated in the highly demanding case of Free Electron Lasers (FELs). Several experiments already showed the feasibility of synchrotron radiation delivery based on a LPA but free electron lasing has still to be achieved. Since the quality of the LPA beam inside the undulator is the critical issue, any LPA based FEL experiment requires a refined characterization of the beam properties along the transport line and of the photon beam at the undulator exit. This characterization relies on diagnostics which must be adapted to the LPA specificities. We will review the electron and photon diagnostics already used on LPAs and required for LPA based FELs, and illustrate the critical points using recent experiments performed around the world.

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Section: Introductionmentioning

confidence: 99%

Electron and photon diagnostics for plasma acceleration-based FELs

Labat

Ajjouri

Hubert

et al. 2018

J Synchrotron Radiat

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“…The other three LPA FEL projects propose to rely on longitudinal dispersion with a chicane for energy spread mitigation. The COXINEL collaboration [21] at SOLEIL/LOA near Paris, France, is relying on transport through a chicane and into a 5-m planar undulator (without strong-focusing). To improve FEL gain and make efficient use of the energy spread, a chromatic transport scheme [22,23] is proposed where the various electron energies are focused at various locations within the undulator.…”

Section: Lpa Fel Experimentsmentioning

confidence: 99%

Free-electron lasers driven by laser plasma accelerators

Tilborg

Barber

Isono

et al. 2017

AIP Conference Proceedings

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Abstract. Laser-plasma accelerators (LPAs) have the potential to drive compact free-electron lasers (FELs). Even with LPA energy spreads typically at the percent level, the e-beam brightness can be excellent, due to the low normalized emittance (<0.5 μm) and high peak current (multi-kA) resulting from the ultra-short e-beam duration (few fs). It is critical, however, that in order to mitigate the effect of percent-level energy spread, one has to actively manipulate the phase-space distribution of the e-beam. We provide an overview of the methods proposed by the various LPA FEL research groups. At the BELLA Center at LBNL, we are pursuing the use of a chicane for longitudinal e-beam decompression (therefore greatly reducing the slice energy spread), in combination with short-scale-length e-beam transportation with an active plasma lens and a strong-focusing 4-m-long undulator. We present ELEGANT & GENESIS simulations on the transport and FEL gain, showing strong enhancement in output power over the incoherent background, and present estimates of the 3D gain length for deviations from the expected e-beam properties (varying e-beam lengths and emittances). To highlight the role of collective effects, we also present ELEGANT & GENESIS simulation results.

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“…Different strategies have been proposed, such as a decompression chicane [139,140] combined to supermatching [141], or a transverse gradient undulator [142].…”

Section: Electron Beam Manipulation With a Laser Plasma Accelerator Amentioning

confidence: 99%

Strategies towards a compact XUV free electron laser adopted for the LUNEX5 project

Couprie

Labat

Évain

et al. 2015

Journal of Modern Optics

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More than 50 years after the laser discovery, X-ray free electron lasers (FEL), the first powerful tuneable, short pulse lasers in the X-ray spectral range, are now blooming in the world, enabling new discoveries on the ultra-fast dynamics of excited systems and imaging. LUNEX5 demonstrator project aims at investigating paths towards advanced and compact FELs. Two strategies are adopted. The first one concerns the FEL line where seeding and echo harmonic generation are implemented together with compact cryogenic in-vacuum undulators. In the second one, the electron beam is no longer provided by a conventional linear accelerator but by a laser plasma process, while a necessary particular electron beam manipulation is required to handle the electron properties to enable FEL amplification.

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Towards a free electron laser based on laser plasma accelerators

Cited by 54 publications

References 136 publications

Electron and photon diagnostics for plasma acceleration-based FELs

Electron and photon diagnostics for plasma acceleration-based FELs

Free-electron lasers driven by laser plasma accelerators

Strategies towards a compact XUV free electron laser adopted for the LUNEX5 project

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