Robustness of a plasma acceleration based free electron laser

Labat, M.; Loulergue, Alexandre; André, Thomas; Andriyash, Igor; Ghaith, Amin; Khojoyan, M.; Marteau, F.; Valléau, Mathieu; Briquez, F.; Benabderrahmane, C.; Marcouillé, Olivier; Évain, C.; Couprie, M.E.

doi:10.1103/physrevaccelbeams.21.114802

Cited by 14 publications

(10 citation statements)

References 74 publications

(89 reference statements)

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“…Actually, it is the slice energy spread at the undulator entrance s g which is directly driven by the initial beam divergence ( figure 5(c)). This can be explained deriving analytically the electron beam slice energy spread [56] at the undulator entrance: with R 522,544 the transport matrix coefficients and s z0 the length of the initial beam (at the LPA source). This simple formula properly fits the simulation results (figure 5(c) with black line).…”

Section: Analytic Modeling Of the Fel Linewidthmentioning

confidence: 99%

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

et al. 2020

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The spectacular development of Laser-Plasma Accelerators (LPA) appears very promising for a free electron laser application. The handling of the inherent properties of those LPA beams already allowed controlled production of LPA-based spontaneous undulator radiation. Stepping further, we here unveil that the forthcoming LPA-based seeded FELs will present distinctive spatio-spectral distributions. Relying on numerical simulations and simple analytical models, we show how those interferometric patterns can be exploited to retrieve, in single-shot, the spectro-temporal content and source point properties of the FEL pulses.

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Section: Analytic Modeling Of the Fel Linewidthmentioning

confidence: 99%

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

et al. 2020

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“…The influence of the skew components of the first quadrupoles was tested on the LPA-based COXINEL line [67,[72][73][74], designed for FEL. For such a purpose, the relative energy spread (RMS) σ γ over one coherent length should be less than σ γ < ρ, with ρ as the Pierce parameter [75].…”

Section: Experimental Test Bench: the Coxinel Linementioning

confidence: 99%

“…The product of the different matrix elements of the line (drift, quadrupole, dipole, etc.) by a particle array gives the 6D phase space of the particle [72]. The code was benchmarked on COXINEL with ASTRA [73,85], ELEGANT [86], and OCELOT [87].…”

Section: Electron Beam Transport For Ideal Magnetic Elementsmentioning

confidence: 99%

Skew Quadrupole Effect of Laser Plasma Electron Beam Transport

et al. 2019

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Laser plasma acceleration (LPA) capable of providing femtosecond and GeV electron beams in cm scale distances brings a high interest for different applications, such as free electron laser and future colliders. Nevertheless, LPA high divergence and energy spread require an initial strong focus to mitigate the chromatic effects. The reliability, in particular with the pointing fluctuations, sets a real challenge for the control of the dispersion along the electron beam transport. We examine here how the magnetic defects of the first strong quadrupoles, in particular, the skew terms, can affect the brightness of the transported electron beam, in the case of the COXINEL transport line, designed for manipulating the electron beam properties for a free electron laser application. We also show that the higher the initial beam divergence, the larger the degradation. Experimentally, after having implemented a beam pointing alignment compensation method enabling us to adjust the position and dispersion independently, we demonstrate that the presence of non-negligible skew quadrupolar components induces a transversal spread and tilt of the beam, leading to an emittance growth and brightness reduction. We are able to reproduce the measurements with beam transport simulations using the measured electron beam parameters.

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“…Further, the beams produced by LPAs possess parameters that are competitive with certain classes of present day injectors. As such, much research has been focused recently on radiation production by LPA-produced beams, not only from FELs [53,54], but also including hard photon emission from Compton scattering sources [55], and from betatron radiation [56].…”

Section: Alternative Approaches For High Brightness Beam Productionmentioning

confidence: 99%

Towards an ultra-compact x-ray free-electron laser (Conference Presentation)

Rosenzweig

2019

Advances in Laboratory-Based X-Ray Sources, Optics, and Applications VII

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In the field of beam physics, two frontier topics have taken center stage due to their potential to enable new approaches to discovery in a wide swath of science. These areas are: advanced, high gradient acceleration techniques, and xray free electron lasers (XFELs). Further, there is intense interest in the marriage of these two fields, with the goal of producing a very compact XFEL. In this context, recent advances in high gradient radio-frequency cryogenic copper structure research have opened the door to the use of surface electric fields between 250 and 500 MV/m. Such an approach is foreseen to enable a new generation of photoinjectors with sixdimensional beam brightness beyond the current state-of-the-art by well over an order of magnitude. This advance is an essential ingredient enabling an ultra-compact XFEL (UC-XFEL). In addition, one may accelerate these bright beams to GeV scale in less arXiv:2003.06083v1 [physics.acc-ph]An Ultra-Compact X-Ray Free-Electron Laser 2 than 10 meters. Such an injector, when combined with inverse free electron laserbased bunching techniques can produce multi-kA beams with unprecedented beam quality, quantified by 50 nm-rad normalized emittances. These beams, when injected into innovative, short-period (1-10 mm) undulators uniquely enable UC-XFELs having footprints consistent with university-scale laboratories. We describe the architecture and predicted performance of this novel light source, which promises photon production per pulse of a few percent of existing XFEL sources. We review implementation issues including collective beam effects, compact x-ray optics systems, and other relevant technical challenges. To illustrate the potential of such a light source to fundamentally change the current paradigm of XFELs with their limited access, we examine possible applications in biology, chemistry, materials, atomic physics, industry, and medicine which may profit from this new model of performing XFEL science.

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Robustness of a plasma acceleration based free electron laser

Cited by 14 publications

References 74 publications

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

Skew Quadrupole Effect of Laser Plasma Electron Beam Transport

Towards an ultra-compact x-ray free-electron laser (Conference Presentation)

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