Compact Multistage Plasma-Based Accelerator Design for Correlated Energy Spread Compensation

Pousa, A. Ferran; Ossa, A. Martínez de la; Brinkmann, R.; Aßmann, Ralph

doi:10.1103/physrevlett.123.054801

Cited by 40 publications

(17 citation statements)

References 67 publications

(79 reference statements)

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“…The scheme-4 LPAS was studied under the blowout regime. As previously described, the acceleration in this scheme is performed in two identical plasma stages joined by a magnetic chicane in which the bunch chirp is inverted [45]. The externally injected beam is coming from the 250 MeV rf injector described above.…”

Section: Study Of Acceleration Stagesmentioning

confidence: 99%

“…Another technique which has been shown to successfully minimize the energy spread consists in splitting the acceleration process into two plasma stages joined by a magnetic chicane. In this way, the energy chirp accumulated in the first stage is inverted in the chicane and can then be effectively compensated for in the second stage [45]. The principle of this technique is sketched in Fig.…”

Section: Fig 6 the Three-laser System Of The Resonant Multipulse Inmentioning

confidence: 99%

“…The longitudinal phase space is shown at the chicane (a) entrance, (b) middle, and (c) exit. Darker color means higher energy [45].…”

Section: Beam Extraction Injection and Transport Issuesmentioning

confidence: 99%

See 2 more Smart Citations

Toward a plasma-based accelerator at high beam energy with high beam charge and high beam quality

Nghiem¹,

Aßmann²,

Beck³

et al. 2020

Phys. Rev. Accel. Beams

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From plasma-wakefield acceleration as a physics experiment toward a plasma-based accelerator as a user facility, the beam physics issues remaining to be solved are still numerous. Providing beams with high energy, charge, and quality simultaneously, not only within the plasma but also at the user doorstep itself, is the main concern. Despite its tremendous efficiency in particle acceleration, the wakefield displays a complex 3D profile which, associated to the beam-loading field induced by the accelerated beam itself, makes the acceleration of high charge to high energy often incompatible with high beam quality. Beam extraction from the plasma without quality degradation for a transfer either to the next plasma stage or to the user application is another difficulty to consider. This article presents the substantial studies carried out and the different innovative methods employed for tackling all these different issues. Efforts focused on achieving the challenging beam parameters targeted by the EuPRAXIA accelerator facility project. The lessons learned at the end of these in-depth simulations and optimizations are highlighted. The sensitivity to different error sources is also estimated to point out the critical components of such an accelerator. Finally, the needs in terms of laser and plasma parameters are provided.

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Section: Study Of Acceleration Stagesmentioning

confidence: 99%

Section: Fig 6 the Three-laser System Of The Resonant Multipulse Inmentioning

confidence: 99%

See 1 more Smart Citation

Toward a plasma-based accelerator at high beam energy with high beam charge and high beam quality

Nghiem¹,

Aßmann²,

Beck³

et al. 2020

Phys. Rev. Accel. Beams

Self Cite

View full text Add to dashboard Cite

show abstract

“…Minimizing this slice energy spread is especially important for PBAs based on chirp compensation schemes 32,33,35 . This is because although the average E experienced by the beam after acceleration might be 0, its value at any point of the accelerator is not, thus giving rise to the development of a slice energy spread which will remain in the de-chirped beam.…”

Section: Impact On Slice Energy Spreadmentioning

confidence: 99%

“…Major efforts have therefore been dedicated towards this objective, including the development of controlled injection techniques [23][24][25][26][27] as well as concepts for mitigating the correlated energy spread arising from the steep slope of the accelerating fields. These include beam loading the wake [28][29][30] , either by the accelerated bunch itself 31 or the injection of a secondary one 32 , the use of modulated 33 or tailored 34 plasma profiles, the insertion of a magnetic chicane in a multistage PBA 35 , or taking advantage of the beam-induced wakefields [36][37][38][39][40] .…”

Section: Introductionmentioning

confidence: 99%

Intrinsic energy spread and bunch length growth in plasma-based accelerators due to betatron motion

Pousa

Ossa

Aßmann

2019

Sci Rep

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Plasma-based accelerators (PBAs), having demonstrated the production of GeV electron beams in only centimetre scales, offer a path towards a new generation of highly compact and cost-effective particle accelerators. However, achieving the required beam quality, particularly on the energy spread for applications such as free-electron lasers, remains a challenge. Here we investigate fundamental sources of energy spread and bunch length in PBAs which arise from the betatron motion of beam electrons. We present an analytical theory, validated against particle-in-cell simulations, which accurately describes these phenomena. Significant impact on the beam quality is predicted for certain configurations, explaining previously observed limitations on the achievable bunch length and energy spread. Guidelines for mitigating these contributions towards high-quality beams are deduced.

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Plasma Photocathodes

Habib,

Heinemann,

Manahan

et al. 2023

Annalen der Physik

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Plasma wakefield accelerators offer accelerating and focusing electric fields three to four orders of magnitude larger than state‐of‐the‐art radiofrequency cavity‐based accelerators. Plasma photocathodes can release ultracold electron populations within such plasma waves and thus open a path toward tunable production of well‐defined, compact electron beams with normalized emittance and brightness many orders of magnitude better than state‐of‐the‐art. Such beams will have far‐reaching impact for applications such as light sources, but also open up new vistas on high energy and high field physics. This paper reviews the innovation of plasma photocathodes, and reports on the experimental progress, challenges, and future prospects of the approach. Details of the proof‐of‐concept demonstration of a plasma photocathode in 90° geometry at SLAC FACET within the E‐210: Trojan Horse program are described. Using this experience, alongside theoretical and simulation‐supported advances, an outlook is given on future realizations of plasma photocathodes such as the upcoming E‐310: Trojan Horse‐II program at FACET‐II with prospects toward excellent witness beam parameter quality, tunability, and stability. Future installations of plasma photocathodes also at compact, hybrid plasma wakefield accelerators, will then boost capacities and open up novel capabilities for experiments at the forefront of interaction of high brightness electron and photon beams.

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Compact Multistage Plasma-Based Accelerator Design for Correlated Energy Spread Compensation

Cited by 40 publications

References 67 publications

Toward a plasma-based accelerator at high beam energy with high beam charge and high beam quality

Toward a plasma-based accelerator at high beam energy with high beam charge and high beam quality

Intrinsic energy spread and bunch length growth in plasma-based accelerators due to betatron motion

Plasma Photocathodes

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